Read Grade-Level Informational Texts
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5th Grade Reading › Read Grade-Level Informational Texts
Read the passage, then answer the question.
Seeds of Change: How a New Crop Traveled
In the 1500s, ships crossed the Atlantic Ocean more often than ever before. People usually remember this time for exploration, but another kind of travel was just as significant: the movement of plants. When a crop moved to a new place, it could change what people ate, how they worked, and even where they lived.
One crop that traveled widely was maize, which many people today call corn. Long before Europeans arrived in the Americas, Indigenous farmers had investigated which seeds produced the strongest plants. Over many generations, they selected seeds from the best harvests. This careful process, sometimes called selective breeding (choosing traits on purpose), made maize more reliable and easier to grow.
After contact between continents increased, maize seeds were carried on ships to Europe and then to parts of Africa and Asia. Maize spread partly because it could grow in different climates and soils. In contrast, some familiar European grains needed cooler weather or special kinds of fields. As a result, farmers in new regions could plant maize where other crops struggled.
However, the new crop did not solve every problem. In some places, leaders encouraged farmers to grow maize because it produced considerable food per acre. Yet when communities relied on one crop too much, they became less prepared for droughts, pests, or plant diseases. This risk is called dependence (needing something so much that it is hard to replace).
Maize also affected trade. When harvests increased, some towns had extra food to sell, and markets expanded. Consequently, more people could live in cities, where they worked at crafts and services instead of farming. Still, the benefits were not equal everywhere, because geography, weather, and local choices shaped what happened next.
Which statement best summarizes the passage?
Maize was invented in Europe and quickly replaced all other crops because it grew best in cold climates.
Maize traveled to new continents, and it influenced farming and trade while also creating risks when people depended on it too much.
Indigenous farmers refused to share maize seeds, so the crop stayed in the Americas for hundreds of years.
Cities grew smaller after maize arrived because fewer people needed to buy food at markets.
Explanation
This question assesses CCSS.RI.5.10: reading and comprehending informational texts at the high end of grades 4-5 text complexity band independently and proficiently. It specifically tests main idea comprehension. This passage is at the high end of grades 4-5 complexity (Lexile 850-900 range) with sophisticated vocabulary like 'selective breeding' and 'dependence,' complex sentence structures averaging 15-20 words, and abstract concepts such as agricultural trade relationships. The question tests whether students can identify the overall focus amidst multiple details about maize's journey and impact. Choice B is correct because it accurately captures the main idea of the entire passage: maize traveled globally, influenced farming and trade, but also created risks from over-dependence. This demonstrates proficient comprehension of complex grade-level text. Choice A represents a too-specific error that contradicts the text (maize originated in the Americas, not Europe) and misses the broader impact. Students who select this may have misread key details or focused on one aspect without considering the whole passage. To help students comprehend complex grade-level texts independently: (1) Build stamina for longer, more sophisticated passages (300-400 words with academic vocabulary and complex sentences). (2) Teach annotation while reading: underline key terms, bracket main ideas, circle transition words, note relationships with arrows. (3) Model strategic reading: preview headings/structure, read actively asking questions (What's this about? Why is this important? How do ideas connect?), summarize sections mentally, identify text structure. (4) Explicitly teach complexity features: point out sophisticated vocabulary, analyze complex sentence structures, identify abstract concepts and how they're explained. (5) Practice close reading: read once for general understanding, re-read to answer specific questions, check answers against text. (6) For main idea comprehension: distinguish topic from main point, check if answer captures whole passage not just one section. (7) Gradually release support: start with think-alouds, move to guided practice, then independent reading with accountability.
Read the passage, then answer the question.
A Small City, Big Water Problem
Sofia’s town is located near a lake, so people assume water will always be plentiful. Yet in late summer, the lake level sometimes drops, and the water becomes warmer. Warmer water can hold less dissolved oxygen, which fish need to survive. At the same time, fertilizers from nearby lawns and farms may wash into the lake after rain.
Fertilizers contain nutrients that help plants grow. In water, those nutrients can cause algae to grow quickly. This sudden growth is called an algal bloom. At first, a bloom may look like a green paint spill on the surface, but the real problem often happens later.
When the algae die, bacteria break them down. That process uses oxygen, so the amount of oxygen in the water can fall. Consequently, fish and other animals may struggle, especially if the lake is already warm. The town noticed that fish were staying near the surface, where oxygen was slightly higher.
Local leaders discussed several solutions. They asked residents to use less fertilizer and to plant native grasses near the shore. These grasses act like a filter, slowing runoff and trapping soil. The town also tested the water more often, because good decisions require accurate information.
By early fall, the lake improved. The leaders understood that the lake’s health depended on many connected factors, not one single cause. Sofia realized that protecting water is not only a science issue; it is also a community responsibility.
Based on the passage, what caused the fish to struggle in the lake?
Native grasses added fertilizer to the lake, which increased fish food.
Too much oxygen entered the lake, which made fish swim to the bottom.
The lake became colder, which made algae stop growing.
Warm water and oxygen being used up as algae were broken down lowered oxygen levels.
Explanation
This question assesses CCSS.RI.5.10: reading and comprehending informational texts at the high end of grades 4-5 text complexity band independently and proficiently. It specifically tests understanding cause-effect relationships in scientific contexts. This passage is at the high end of grades 4-5 complexity (Lexile 850-900 range) with sophisticated scientific vocabulary like 'algal bloom' and 'dissolved oxygen,' complex sentence structures, and abstract concepts about ecosystem interactions. The question tests whether students can identify the compound causes that led to fish struggling in the lake. Choice C is correct because it accurately combines both factors mentioned in the text: warm water (which holds less oxygen) and oxygen depletion from bacteria breaking down dead algae. This demonstrates proficient comprehension of multiple interacting causes in complex text. Choice A represents a reversed cause-effect error - the text states warm water was a problem, not cold water stopping algae. Students who select this may have confused the sequence of events or made assumptions contrary to the text. To help students comprehend complex grade-level texts independently: (1) Build stamina for longer, more sophisticated passages (300-400 words with academic vocabulary and complex sentences). (2) Teach annotation while reading: underline key terms, bracket main ideas, circle transition words, note relationships with arrows. (3) Model strategic reading: preview headings/structure, read actively asking questions (What's this about? Why is this important? How do ideas connect?), summarize sections mentally, identify text structure. (4) Explicitly teach complexity features: point out sophisticated vocabulary, analyze complex sentence structures, identify abstract concepts and how they're explained. (5) Practice close reading: read once for general understanding, re-read to answer specific questions, check answers against text. (6) For cause-effect relationships: trace the chain of events (fertilizer → algae growth → algae death → bacteria use oxygen → fish struggle), identify multiple contributing factors. (7) Gradually release support: start with think-alouds, move to guided practice, then independent reading with accountability.
Read the passage, then answer the question.
Measuring Earth’s Shaking: The Richter Scale and Beyond
When the ground shakes during an earthquake, the movement can be gentle or severe. To describe earthquakes, scientists use measurements, not guesses. One early tool was the Richter scale, which compared the size of earthquake waves recorded by a machine called a seismograph.
The Richter scale is logarithmic, meaning each whole number increase represents a much larger change than it seems. For example, a magnitude 6 earthquake creates waves about ten times larger than a magnitude 5 earthquake. Because energy also rises quickly, the difference in damage can be considerable.
However, scientists do not rely on one number alone. They also examine where the earthquake happened, how deep it was, and what kind of ground is nearby. Soft soil can shake more than solid rock, which may increase damage in certain neighborhoods. As a result, two earthquakes with the same magnitude can have different effects.
Today, scientists use several scales and maps to communicate risk. These tools help engineers design safer buildings and help communities plan emergency drills. Although people cannot prevent earthquakes, they can reduce harm by understanding measurements and preparing.
As used in paragraph 2, what does the word considerable most nearly mean?
Able to be argued about
Hard to remember
Very small
Large or significant
Explanation
This question assesses CCSS.RI.5.10: reading and comprehending informational texts at the high end of grades 4-5 text complexity band independently and proficiently. It specifically tests vocabulary in context. This passage is at the high end of grades 4-5 complexity (Lexile 850-900 range) with sophisticated scientific vocabulary like 'logarithmic' and 'seismograph,' complex mathematical concepts, and abstract ideas about measurement scales. The question tests whether students can determine the meaning of 'considerable' using context clues about earthquake magnitude differences. Choice D is correct because the context indicates that when earthquake waves increase tenfold between magnitudes, 'the difference in damage can be considerable,' clearly suggesting something large or significant rather than small. This demonstrates proficient comprehension of academic vocabulary in complex text. Choice A represents selecting the opposite meaning - the context clearly indicates the difference is large, not small. Students who select this may have misunderstood the mathematical relationship or not used context clues effectively. To help students comprehend complex grade-level texts independently: (1) Build stamina for longer, more sophisticated passages (300-400 words with academic vocabulary and complex sentences). (2) Teach annotation while reading: underline key terms, bracket main ideas, circle transition words, note relationships with arrows. (3) Model strategic reading: preview headings/structure, read actively asking questions (What's this about? Why is this important? How do ideas connect?), summarize sections mentally, identify text structure. (4) Explicitly teach complexity features: point out sophisticated vocabulary, analyze complex sentence structures, identify abstract concepts and how they're explained. (5) Practice close reading: read once for general understanding, re-read to answer specific questions, check answers against text. (6) For vocabulary in context: examine the sentence containing the word, consider what makes sense given the topic (tenfold increase suggests big difference), eliminate illogical choices. (7) Gradually release support: start with think-alouds, move to guided practice, then independent reading with accountability.
Read the passage, then answer the question.
From Ore to Object: The Journey of Aluminum
Aluminum is used in many products, from bicycles to food containers. It is light, does not rust easily, and can be shaped into many forms. Yet aluminum does not start out as shiny metal. It begins as a rock called bauxite, which must be processed in several steps.
First, miners remove bauxite from the ground. Then factories crush it and treat it with chemicals to separate out alumina, a white powder. In the next stage, electricity is used to turn alumina into aluminum metal. This step requires a great deal of energy, so the location of aluminum plants often depends on access to affordable power.
Because making new aluminum takes so much electricity, recycling becomes especially important. When aluminum is recycled, it can be melted and reused without repeating every earlier step. Consequently, recycling can save energy and reduce the need for new mining. It can also lower the amount of waste sent to landfills.
Still, recycling only works when people participate. Communities need collection programs, and individuals must sort materials carefully. A greasy container, for instance, might contaminate a batch of recycling. In this context, “batch” means a group processed together.
Understanding the full journey of aluminum helps people see how everyday choices connect to larger systems. When a student drops a can into the correct bin, that small action can support a process that saves resources.
What is the author’s main purpose in writing this passage?
To explain how aluminum is made and why recycling it can save energy and resources
To argue that recycling programs should accept every material without sorting
To persuade readers that aluminum is the only useful metal for building
To entertain readers with a fictional story about a miner’s adventure
Explanation
This question assesses CCSS.RI.5.10: reading and comprehending informational texts at the high end of grades 4-5 text complexity band independently and proficiently. It specifically tests identifying author's purpose. This passage is at the high end of grades 4-5 complexity (Lexile 850-900 range) with sophisticated technical vocabulary like 'bauxite' and 'alumina,' complex multi-step processes, and abstract concepts about resource conservation. The question tests whether students can determine the author's main purpose across the entire passage. Choice C is correct because it accurately captures both major topics covered: the explanation of how aluminum is made (from bauxite through multiple steps) and why recycling matters (saves energy and resources). This demonstrates proficient comprehension of author's purpose in complex informational text. Choice B represents a too-narrow interpretation that adds a persuasive claim not present in the text - the passage explains aluminum's properties but doesn't argue it's the only useful metal. Students who select this may have confused explanation with persuasion or focused on one detail. To help students comprehend complex grade-level texts independently: (1) Build stamina for longer, more sophisticated passages (300-400 words with academic vocabulary and complex sentences). (2) Teach annotation while reading: underline key terms, bracket main ideas, circle transition words, note relationships with arrows. (3) Model strategic reading: preview headings/structure, read actively asking questions (What's this about? Why is this important? How do ideas connect?), summarize sections mentally, identify text structure. (4) Explicitly teach complexity features: point out sophisticated vocabulary, analyze complex sentence structures, identify abstract concepts and how they're explained. (5) Practice close reading: read once for general understanding, re-read to answer specific questions, check answers against text. (6) For author's purpose: distinguish between inform/explain, persuade, and entertain; look at the whole passage not just one section; check if the purpose covers all major topics. (7) Gradually release support: start with think-alouds, move to guided practice, then independent reading with accountability.
Read the passage, then answer the question.
Turning Sunlight into Sugar: Photosynthesis
Plants cannot walk to find food, so they make their own. The process is called photosynthesis (using sunlight to make sugar). Although it sounds like magic, it is a set of chemical steps that happen mostly in leaves.
First, a plant takes in carbon dioxide from the air through tiny openings. It also pulls water up from the soil through its roots. Inside the leaf, a green substance called chlorophyll captures light energy. This energy helps the plant combine carbon dioxide and water into sugar.
Sugar is important because it stores energy. The plant can use that energy to grow new leaves, build roots, or produce flowers. Some of the sugar may be stored for later, like saving money in a bank. In addition, oxygen is released during photosynthesis, which is one reason animals can breathe.
However, photosynthesis does not happen equally fast all the time. If a plant does not get enough light or water, the process slows. Temperature also matters, because chemical reactions often work best within a certain range. When conditions improve, photosynthesis can increase again.
Scientists measure photosynthesis to understand ecosystems, which are communities of living things and their environment. When plants make more sugar, they can support more insects and animals. Consequently, a change in sunlight or rainfall can affect many living things, not just the plants.
Which detail best supports the idea that photosynthesis affects more than just plants?
A plant takes in carbon dioxide through tiny openings in its leaves.
Temperature matters because chemical reactions often work best within a certain range.
Oxygen is released during photosynthesis, which is one reason animals can breathe.
Plants cannot walk to find food, so they make their own.
Explanation
This question assesses CCSS.RI.5.10: reading and comprehending informational texts at the high end of grades 4-5 text complexity band independently and proficiently. It specifically tests identifying supporting details for a broader concept. This passage is at the high end of grades 4-5 complexity (Lexile 850-900 range) with sophisticated scientific vocabulary like 'photosynthesis' and 'chlorophyll,' complex sentence structures, and abstract concepts about energy transformation. The question tests whether students can identify which detail best supports the idea that photosynthesis has effects beyond individual plants. Choice C is correct because it explicitly states that oxygen released during photosynthesis 'is one reason animals can breathe,' directly showing how the process affects other organisms. This demonstrates proficient comprehension of supporting evidence in complex text. Choice A represents selecting a detail about plants only, not their broader impact. Students who select this may have focused on an interesting fact without considering whether it supports the specific claim about affecting more than just plants. To help students comprehend complex grade-level texts independently: (1) Build stamina for longer, more sophisticated passages (300-400 words with academic vocabulary and complex sentences). (2) Teach annotation while reading: underline key terms, bracket main ideas, circle transition words, note relationships with arrows. (3) Model strategic reading: preview headings/structure, read actively asking questions (What's this about? Why is this important? How do ideas connect?), summarize sections mentally, identify text structure. (4) Explicitly teach complexity features: point out sophisticated vocabulary, analyze complex sentence structures, identify abstract concepts and how they're explained. (5) Practice close reading: read once for general understanding, re-read to answer specific questions, check answers against text. (6) For supporting detail questions: identify the claim being supported, evaluate each choice for relevance to that specific claim, choose the detail that most directly connects. (7) Gradually release support: start with think-alouds, move to guided practice, then independent reading with accountability.
Read the passage, then answer the question.
How a Bill Becomes a Law (In a Simplified Way)
In a democracy, citizens share power by choosing leaders and by following laws that apply to everyone. A law does not usually appear overnight. Instead, it is created through a process meant to be careful, because a rule that affects many people should be examined from more than one angle.
A new idea for a law often begins as a proposal (a plan suggested for others to consider). A community member might notice a problem, such as unsafe crosswalks, and ask an elected official to help. The official can write the idea as a bill, which is a written plan for a possible law.
Next, a group of lawmakers may discuss the bill in a committee. They might investigate facts, listen to experts, and revise the bill’s wording. This step is important because small changes in language can have a significant effect. For example, the word “may” gives choice, while “must” requires action.
After that, lawmakers debate and vote. If the bill passes, it may be sent to another group of lawmakers to be considered again. This second review can slow things down, but it also helps prevent careless decisions. Finally, if leaders approve the bill, it becomes law.
Even after a law is passed, people can evaluate whether it works as intended. If it causes unexpected problems, lawmakers can propose changes. In this way, democracy is not only about voting; it is also about improving rules over time.
As used in paragraph 2, what does the word proposal mean?
A disagreement between two lawmakers
A plan suggested for others to consider
A payment collected by the government
A final rule that everyone must follow
Explanation
This question assesses CCSS.RI.5.10: reading and comprehending informational texts at the high end of grades 4-5 text complexity band independently and proficiently. It specifically tests vocabulary in context. This passage is at the high end of grades 4-5 complexity (Lexile 850-900 range) with sophisticated civic vocabulary, complex sentence structures about governmental processes, and abstract concepts about democracy. The question tests whether students can determine word meaning in an academic context using context clues. Choice B is correct because it accurately captures the meaning of 'proposal' as defined in the parenthetical explanation: 'a plan suggested for others to consider.' This demonstrates proficient comprehension of academic vocabulary in complex text. Choice A represents a common meaning in the wrong context error - while proposals can lead to rules, the text specifically defines it as a suggestion, not a final requirement. Students who select this may have used their general understanding without checking the specific context. To help students comprehend complex grade-level texts independently: (1) Build stamina for longer, more sophisticated passages (300-400 words with academic vocabulary and complex sentences). (2) Teach annotation while reading: underline key terms, bracket main ideas, circle transition words, note relationships with arrows. (3) Model strategic reading: preview headings/structure, read actively asking questions (What's this about? Why is this important? How do ideas connect?), summarize sections mentally, identify text structure. (4) Explicitly teach complexity features: point out sophisticated vocabulary, analyze complex sentence structures, identify abstract concepts and how they're explained. (5) Practice close reading: read once for general understanding, re-read to answer specific questions, check answers against text. (6) For vocabulary in context: read surrounding sentences carefully, look for definition clues (especially parenthetical explanations), consider domain-specific meaning over common usage. (7) Gradually release support: start with think-alouds, move to guided practice, then independent reading with accountability.
Read the passage, then answer the question.
A River’s Slow Work: Erosion and Communities
A river can look calm from a bridge, but it is always doing work. As water moves, it carries tiny pieces of rock and soil. Over time, this movement can shape the land in ways that are easy to see, such as sandbars, curved banks, and wide floodplains.
The process is called erosion (wearing away and moving earth materials). Erosion happens faster when water flows quickly, especially after heavy rain. When a river bends, the current often strikes the outside bank more strongly, so that side may crumble. Meanwhile, the inside of the bend can collect sediment, building new land.
These changes can create both opportunities and problems for people. Farmers may appreciate floodplains because the soil is often rich. However, homes built too close to a shifting bank can be at risk. A river that erodes one side may also deposit mud in another place, which can make boats harder to steer.
Communities have tried different solutions. Some towns build walls or plant trees to hold soil in place. In other areas, people choose to move buildings farther from the river, even though it requires planning and money. Each choice has trade-offs: a wall may protect one spot but speed up erosion downstream.
Scientists and local leaders often analyze maps and measure water speed before deciding what to do. Although no plan can stop a river completely, careful investigation can demonstrate where the greatest risks are. In the end, understanding erosion helps communities live with the river’s slow, powerful work.
Based on the passage, why might a town decide to move buildings farther from the river instead of building a wall?
Because moving buildings can avoid causing faster erosion in other places downstream.
Because floodplains have poor soil that cannot support farms.
Because walls always make the river stop flowing completely.
Because erosion only happens in deserts, not near rivers.
Explanation
This question assesses CCSS.RI.5.10: reading and comprehending informational texts at the high end of grades 4-5 text complexity band independently and proficiently. It specifically tests inference and cause-effect relationships. This passage is at the high end of grades 4-5 complexity (Lexile 850-900 range) with sophisticated vocabulary like 'erosion' and 'sediment,' complex sentence structures, and abstract concepts about environmental trade-offs. The question tests whether students can draw logical conclusions from evidence about why communities might choose one solution over another. Choice A is correct because it accurately infers the reason based on the text's statement that 'a wall may protect one spot but speed up erosion downstream.' This demonstrates proficient comprehension through logical inference from complex text. Choice B represents an explicitly contradicted error (the text discusses river erosion, not desert erosion). Students who select this may have made assumptions without checking the text or confused different types of erosion. To help students comprehend complex grade-level texts independently: (1) Build stamina for longer, more sophisticated passages (300-400 words with academic vocabulary and complex sentences). (2) Teach annotation while reading: underline key terms, bracket main ideas, circle transition words, note relationships with arrows. (3) Model strategic reading: preview headings/structure, read actively asking questions (What's this about? Why is this important? How do ideas connect?), summarize sections mentally, identify text structure. (4) Explicitly teach complexity features: point out sophisticated vocabulary, analyze complex sentence structures, identify abstract concepts and how they're explained. (5) Practice close reading: read once for general understanding, re-read to answer specific questions, check answers against text. (6) For inference questions: find text evidence that supports the conclusion, verify the answer isn't directly stated but logically follows from what is stated. (7) Gradually release support: start with think-alouds, move to guided practice, then independent reading with accountability.
Read the informational text, then answer the question.
Paragraph 1
Long before airplanes, people traveled and traded using rivers. Rivers acted like natural roads because boats could carry heavy goods more easily than wagons on rough land.
Paragraph 2
However, rivers were not always easy to use. Some had waterfalls or shallow areas that blocked travel. In the 1800s, builders created canals, which are human-made waterways, to connect rivers and lakes.
Paragraph 3
Canals often included locks. A lock is a chamber with gates that can raise or lower a boat by changing the water level. First, a boat enters the chamber and the gate closes behind it. Next, water is added or drained until the boat reaches the new height. Finally, the front gate opens and the boat continues.
Paragraph 4
Canals changed where people settled. Towns grew near canal routes because workers, shops, and warehouses were needed. Consequently, farmers could send crops to distant cities, and city factories could ship tools back to rural areas.
Paragraph 5
Eventually, railroads became faster in many regions. Even so, canals demonstrate how engineering can solve geographic problems and influence migration and trade.
Question: How is the information in the passage mainly organized?
Problem-solution focused only on why railroads replaced canals
Sequence and cause-effect, explaining how canals work and how they changed settlements and trade
Compare-contrast between canals and oceans
Description of famous canal workers and their daily routines
Explanation
This question assesses CCSS.RI.5.10: reading and comprehending informational texts at the high end of grades 4-5 text complexity band independently and proficiently. It specifically tests text structure recognition. This passage is at the high end of grades 4-5 complexity with sophisticated vocabulary like 'locks,' 'chamber,' and 'engineering,' complex sentence structures, and abstract concepts about human-made waterways and their impacts. The question tests whether students can recognize the organizational structure of the entire passage. Choice B is correct because it accurately identifies the text's dual structure: sequence (paragraph 3's step-by-step explanation of how locks work with 'First...Next...Finally') AND cause-effect (paragraph 4's explanation of how canals caused settlement changes with 'Consequently'), demonstrating proficient comprehension of complex text organization. Choice C represents a one-part-only error, identifying problem-solution but missing the sequence structure and incorrectly stating the passage focuses only on railroad replacement. Students who select this may have identified structure of one section without analyzing the whole passage's organization. To help students comprehend complex grade-level texts independently: (1) Build stamina for longer, more sophisticated passages (300-400 words with academic vocabulary and complex sentences). (2) Teach annotation while reading: underline key terms, bracket main ideas, circle transition words, note relationships with arrows. (3) Model strategic reading: preview headings/structure, read actively asking questions (What's this about? Why is this important? How do ideas connect?), summarize sections mentally, identify text structure. (4) Explicitly teach complexity features: point out sophisticated vocabulary, analyze complex sentence structures, identify abstract concepts and how they're explained. (5) Practice close reading: read once for general understanding, re-read to answer specific questions, check answers against text. (6) For text structure: identify transition words and organizational patterns throughout the passage, recognize when multiple structures are used, distinguish between structure of individual paragraphs versus overall passage organization. (7) Gradually release support: start with think-alouds highlighting structure clues, move to guided practice mapping text organization, then independent reading with accountability.
Read the informational text, then answer the question.
Paragraph 1
An ecosystem is a community of living things, such as plants and animals, interacting with their environment. Even a small pond can be an ecosystem because many organisms depend on one another.
Paragraph 2
In a pond, algae and water plants capture sunlight and make food through photosynthesis. These producers form the base of a food web. Small insects and snails eat the plants, and then fish may eat the insects.
Paragraph 3
Not every organism gets energy by hunting or grazing. Decomposers, including bacteria and fungi, break down dead plants and animals. This process returns nutrients to the water and mud, which helps producers grow again.
Paragraph 4
Changes in one part of the pond can affect many others. For example, if pollution blocks sunlight, producers may grow more slowly. As a result, there is less food for insects, and fish populations may also decrease.
Paragraph 5
Scientists often analyze ecosystems by looking for relationships. When they observe a pond over time, they can investigate which changes are temporary and which are long-lasting.
Question: As used in paragraph 3, what does the word returns most nearly mean?
Turns around quickly
Refuses to share
Earns a reward
Goes back or gives back
Explanation
This question assesses CCSS.RI.5.10: reading and comprehending informational texts at the high end of grades 4-5 text complexity band independently and proficiently. It specifically tests vocabulary in context. This passage is at the high end of grades 4-5 complexity with sophisticated scientific vocabulary like 'ecosystem,' 'photosynthesis,' and 'decomposers,' complex sentence structures, and abstract ecological concepts. The question tests whether students can determine word meaning in academic context using surrounding text clues. Choice A is correct because 'returns' in this context means 'gives back'—the text states decomposers break down dead matter and this process 'returns nutrients to the water and mud,' clearly indicating nutrients are given back to the environment. This demonstrates proficient comprehension of academic vocabulary in complex text. Choice C represents a common meaning in wrong context error—while 'returns' can mean 'turns around quickly' in some contexts, this physical motion meaning doesn't fit the scientific process being described. Students who select this may have used the most familiar word meaning without checking context clues about nutrients and decomposition. To help students comprehend complex grade-level texts independently: (1) Build stamina for longer, more sophisticated passages (300-400 words with academic vocabulary and complex sentences). (2) Teach annotation while reading: underline key terms, bracket main ideas, circle transition words, note relationships with arrows. (3) Model strategic reading: preview headings/structure, read actively asking questions (What's this about? Why is this important? How do ideas connect?), summarize sections mentally, identify text structure. (4) Explicitly teach complexity features: point out sophisticated vocabulary, analyze complex sentence structures, identify abstract concepts and how they're explained. (5) Practice close reading: read once for general understanding, re-read to answer specific questions, check answers against text. (6) For vocabulary in context: read surrounding sentences for clues, consider domain-specific meaning in science texts, substitute answer choices into the sentence to check which makes sense, look for explanation or examples that clarify meaning. (7) Gradually release support: start with think-alouds, move to guided practice, then independent reading with accountability.
Read the informational text, then answer the question.
Paragraph 1
When engineers design a bridge, they do not begin by choosing paint colors. First, they identify the problem: the bridge must safely carry people and vehicles over an obstacle, such as a river.
Paragraph 2
Next, engineers list criteria and constraints. Criteria are goals the design should meet, like holding a certain weight. Constraints are limits, such as a budget or the materials available.
Paragraph 3
Then they create and test models. A model might be a small structure made from wood or a computer simulation. If a model bends too much, engineers analyze why it failed and revise the design.
Paragraph 4
Testing happens more than once. In fact, a successful bridge is usually the result of many improvements, not a single perfect idea. Furthermore, engineers must consider the environment, because wind, water, and temperature changes can weaken materials over time.
Paragraph 5
Finally, builders follow the plan to construct the bridge. Even during construction, inspectors measure and investigate to make sure the bridge matches the design and remains safe.
Question: As used in paragraph 2, what does the word constraints mean?
Instructions that are optional and rarely followed
Decorations added at the end of a project
Mistakes that engineers ignore during testing
Limits or restrictions that affect what can be done
Explanation
This question assesses CCSS.RI.5.10: reading and comprehending informational texts at the high end of grades 4-5 text complexity band independently and proficiently. It specifically tests vocabulary in context. This passage is at the high end of grades 4-5 complexity with sophisticated engineering vocabulary like 'criteria,' 'constraints,' and 'simulation,' complex sentence structures, and abstract concepts about design processes. The question tests whether students can determine technical word meaning using context clues. Choice A is correct because 'constraints' means 'limits or restrictions'—the text explicitly defines it as 'limits, such as a budget or the materials available,' making this the accurate meaning in engineering context. This demonstrates proficient comprehension of technical vocabulary in complex text. Choice B represents a partial-meaning error, confusing 'constraints' with decorative elements, possibly because both relate to design projects but in completely different ways. Students who select this may not have used the direct definition provided in the text immediately after the term. To help students comprehend complex grade-level texts independently: (1) Build stamina for longer, more sophisticated passages (300-400 words with academic vocabulary and complex sentences). (2) Teach annotation while reading: underline key terms, bracket main ideas, circle transition words, note relationships with arrows. (3) Model strategic reading: preview headings/structure, read actively asking questions (What's this about? Why is this important? How do ideas connect?), summarize sections mentally, identify text structure. (4) Explicitly teach complexity features: point out sophisticated vocabulary, analyze complex sentence structures, identify abstract concepts and how they're explained. (5) Practice close reading: read once for general understanding, re-read to answer specific questions, check answers against text. (6) For vocabulary in context: look for direct definitions or explanations following technical terms, use examples given to understand meaning, recognize when texts define terms explicitly versus requiring inference from context. (7) Gradually release support: start with think-alouds identifying context clues and definitions, move to guided practice, then independent reading with accountability.