- According to the text, why is pollination important for plants?
Answer: It helps flowers make seeds, so new plants can grow
The text says pollination helps a flower make seeds, which lets new plants grow, so answer A is correct. Choice B is wrong because pollination is not about nests. Choice C is wrong because nectar and pollen are two different things. Choice D is wrong because the text does not mention flowers changing color.
- According to the passage, how are buses and cars different?
Answer: Buses stop at set places, but cars go where families choose.
The passage says buses stop at the same spots each day, but cars go wherever a family picks. Choice B is wrong because trains, not cars, carry the most riders. Choice C is wrong because the passage says too many cars can make roads slow. Understanding this difference helps readers compare types of transportation.
- What is the main idea of this passage?
Answer: Neighbors work together to grow food in a garden.
The passage describes neighbors picking a spot, planting, watering, and sharing food together, so the main idea is that neighbors work together to grow food, making answer A correct. Choice B is wrong because the passage never compares pulling weeds to planting. Choice C is wrong because the passage does not say plants grow only in sunny spots. Choice D is wrong because the passage does not say gardens are too much work.
- According to the passage, how are granite and basalt different?
Answer: Granite cools slowly and has big grains, while basalt cools fast and has tiny grains.
Granite cools slowly and has bigger grains, while basalt cools fast from a volcano and has tiny grains. Choice B is wrong because the passage does not talk about oceans or deserts. Choice C is wrong because the passage does not say basalt is always light and granite always dark. Choice D is wrong because both rocks start as melted rock, not mud or sand.
- According to the text, how are a cactus and a fern alike?
Answer: Both plants need sunlight to grow.
The text says both plants need sunlight. In this text, the cactus lives in the desert, stores water in a thick stem, and has spines; the fern lives in a wet, shady forest. Those details do not describe both plants.
- According to the text, why does a pulley help lift a bucket?
Answer: It changes the direction of the pull, making lifting feel easier.
A pulley works by changing the direction someone pulls, so pulling down can lift something up. This makes lifting feel easier, even though the object's weight has not changed. The pulley does not remove water from the bucket, so that answer is incorrect. It also does not stop the rope from moving or turn the bucket into a wheel, so those answers do not match the text.
- Why was the refrigerator an important invention?
Answer: It let food stay fresh longer, so families wasted less.
The refrigerator kept food cold with power instead of ice, so food lasted longer and families wasted less. Choice B is wrong because the refrigerator replaced ice, it did not make ice melt faster. Choice C is wrong because refrigerators reduced the need for ice, not increased ice sales. Choice D is wrong because the passage never says anything about taste.
- According to the text, why does a bear hibernate?
Answer: Because winter has less food, so sleeping helps the bear save energy.
Choice C is correct because the passage says food is hard to find in winter, and a slower body uses less energy, which helps the bear get through winter. Choice A is wrong because the passage says food is hard to find in winter, not summer. Choice B is wrong because sleeping does not change the weather outside. Choice D is wrong because the passage never mentions a coat or fur growing thicker.
- What does the word "embryo" mean in this passage?
Answer: a tiny plant that has not grown yet
The passage says an embryo is a tiny plant that has not grown yet, protected inside the seed. Choice B is wrong because that describes the seed's outer coat, not the embryo. Choice C is wrong because soil is not what an embryo is. Understanding this word helps readers picture what is inside a seed.
- What happens because an animal's body slows down during hibernation?
Answer: It needs less food for a long time.
The passage says a slower body uses less energy, so the animal does not need to search for food, making answer A correct. Choice B is wrong because animals store fat before winter, not after. Choice C is wrong because animals do not control the weather. Choice D is wrong because the animal sleeps through winter instead of staying awake.
- According to the text, why can being awake at night help an animal?
Answer: It can help the animal stay cool and hide from other animals.
Choice B is correct because the text says being awake at night can help an animal stay cool and hide. Choice A is wrong because the text never mentions sleeping longer. Choice C is wrong because the text says big eyes help owls see, not that eyes get weaker. Choice D is wrong because sunlight is not present at night. Look for the exact reason the text gives.
- According to the text, why do bears hibernate in winter?
Answer: Bears hibernate because sleeping uses less energy when food is hard to find.
The text says bears sleep through winter because it lets their bodies use less energy, which helps them live when food is hard to find, so answer B is correct. Choice A is wrong because gathering nuts is something squirrels do. Choice C is wrong because hibernating does not change the weather. Choice D is wrong because the text never says bears' dens are too cold to leave.
- What is the main idea of this passage?
Answer: Town helpers have different jobs that help the town.
The passage names several helpers, such as firefighters, trash workers, and doctors, who each do a different job to help the town, so that is the main idea. The passage does not say firefighters are the most important; every job matters. How often trash should be picked up is never discussed in the passage. Doctors are only one of several helpers named, not the only one a town needs.
- Why did many communities start using money instead of barter?
Answer: Money made trading easier, since everyone agreed on its value.
The passage says people agreed on what money was worth, which made trading easier, so answer A is correct. Choice B is wrong because the passage says barter could feel unfair, not that it took a long time. Choice C is wrong because the passage does not say money was mostly for land and animals. Choice D is wrong because the passage does not say barter only worked in cities.
- According to the text, why do rainbows appear after rain?
Answer: Sunlight bends and spreads colors through water drops.
Rainbows appear because sunlight bends as it passes through tiny water drops, which spreads out the colors, so answer B is correct. Choice A is wrong because the passage does not say rain cools the air. Choice C is wrong because the passage does not say clouds paint colors. Choice D is wrong because the passage does not say wind pushes colors.
- What is one reason plants spread their seeds far away?
Answer: So new plants do not crowd each other.
Plants spread seeds far away so new plants do not crowd each other. A dandelion's seeds float on the wind, and a coconut floats on water, so each new plant can land in its own space. Choice A is wrong because seeds do not only grow on beaches. Choice B is wrong because the parent plant does not move, and choice D is wrong because the passage does not say animals eat all the seeds right away.
- What does the passage explain about pulleys?
Answer: They help lift loads by moving a rope over a wheel.
The passage explains that a pulley helps lift loads by moving a rope over a wheel. Choice A is wrong because the passage does not say pulleys only work if made of wood. Choice B is wrong because the passage says a pulley makes lifting easier, not that the load actually weighs less. Choice D is wrong because a pulley can be used again and again, not just once.
- How are metal and wool different in this passage?
Answer: Metal moves heat fast, but wool slows heat down.
Metal moves heat quickly, so a metal spoon feels hot fast. Wool slows heat down, so it helps keep warmth in. Choice A is wrong because metal does not stop heat completely. Choice B mixes up which material holds air and which moves heat. Choice D is wrong because wool holds heat in rather than letting it out.
- Based on the passage, why do these special parts help buildings in earthquakes?
Answer: They let the building move a little, so less shaking reaches it
The passage says these special parts let the bottom of the building move a little, so less shaking travels up, making answer A correct. Choice B is wrong because the ground does not stop moving. Choice C is wrong because the passage never mentions adding weight to the top. Choice D is wrong because height is not mentioned.
- What is one effect of the river picking up and dropping soil?
Answer: They can reshape land by moving and dropping soil
The passage says the river picks up soil, carries it, and drops it to form new land, so moving and dropping soil can reshape the land, making answer A correct. Choice B is wrong because the passage does not say rivers stop flowing. Choice C is wrong because it does not say plants lose roots everywhere. Choice D is wrong because ice is not mentioned.
