4th Grade Science

Help Questions

4th Grade Science › 4th Grade Science

Questions 1 - 10
1

This is a map of different active volcanoes in California and their hazard levels and zones.

Screen shot 2020 06 18 at 8.23.01 am

Based on the map provided, what pattern can be identified with the location of the volcanoes?

The most hazardous volcanoes are located in the northern part of the state.

The most hazardous volcanoes are located in the southern part of the state.

The most hazardous volcanoes are located in the western part of the state.

There are no identifiable patterns on this map.

Explanation

Maps are a tool used to not only find locations and directions to a specific place but also a way to find patterns about Earth's landforms. When looking at this legend, we can see that the red triangles represent the most hazardous volcanoes in the state. Most of the high to very high hazard level volcanoes are located in Northern California. This pattern can be recognized based on the information from this map.

2

Animals have different sense receptors that are specialized for particular kinds of information.

True

False

Explanation

This is a true statement. Animals have specific receptors that do a specialized job. Animals use their five sense just like humans to take in information that later is processed. They may have different levels of abilities with the senses (exceptional eyesight, night vision, echolocation, etc.), but they all use them to receive information.

3

Which of the following is NOT an example of a feature an animal may use to receive information about its surroundings?

Whiskers

Ears

Sight

Stomach

Explanation

Animals have many different features that they use to receive information about their surroundings. For example, a cat can use its whiskers to determine whether its body would fit through a tight space. Moths use their sense of hearing to avoid being hunted by bats. Birds of prey have long-distance sight to be able to spot prey from far away.

4

Some plants have fibrous roots that branch in many different directions. These roots help the plants to absorb water quickly, while also holding them in the ground. In which of the following scenarios would fibrous roots serve as a structure for a plant’s survival?

A forest fire overtakes a large area of land

A hurricane ravages a beachfront

A storm causes a river to crest and flood the surrounding area

A bolt of lightning strikes a tall tree

Explanation

Because fibrous roots can help hold a plant in the ground, in the event of flooding, this root system would help anchor the plant in place, thus allowing it to survive. While these types of roots do enable plants to absorb water, this ability alone would not cause the plant to survive an event such as a forest fire, lightning strike, or hurricane.

5

The brain is where all information received from the senses is processed.

True

False

Explanation

Animals take in information through their five senses, just like humans. Once the information is received, it is processed for understanding and reaction. The brain is the hub for all processing. The mind will send out messages to the rest of the body with instructions on how to react or behave with the information the five senses collected.

6

When a habit has limited resources, there is a struggle between organisms within the habit to survive. What can this be described as?

Competition

Predation

Prey

Predator

Explanation

In order to answer this question correctly, we need to understand the terms in the answer choices.

Predation is when an organism hunts and kills another organism to eat.

Prey: Within the process of predation, the prey is the organism that gets killed.

Predator: Within the process of predation, the predator is the organism that does the killing.

Competition is when a habit has limited resources and there is a struggle between organisms within the habit to survive

The correct answer for this question is competition.

7

Andy says that animals have structures that help them survive, but the skin is not one of those structures. Which of the following arguments DISPROVES Andy’s statement?

Armadillos, hedgehogs, and porcupines all have armor-like skin, which protects them from predators and harsh environments.

Arthropods have exoskeletons that they molt as their bodies grow.

Mollusks, like snails, have calcified shells that protect them from predators and rough seas.

None of these arguments disprove Andy’s statement.

Explanation

Andy is arguing that skin cannot help an animal survive, but he can be proven wrong. Many mammals, such as armadillos, hedgehogs, and porcupines, have protective skin features, such as quills and bony plates. These features of skin not only protect the animals from predators but also harsh habitats.

8

Platypus have a "sixth-sense" that allows them to hunt underwater: electroreception. To find meals in the mud, it uses its bill to detect movements and subtle electric fields produced by its prey. Receptors on the bill detect changes in pressure and motion. Two types of receptors track the electrical signals produced by small prey when they contract their muscles. The platypus moves its head side-to-side to determine the direction and distance of its next meal by collecting and processing this sensory information. The platypus has about 40,000 of these special receptors.

Based on the passage, which of the following sentences best describes how the platypus processes an electrical signal?

Screen shot 2020 08 20 at 8.05.03 am

The platypus’ tail first detects the signal and works as an oar to turn it in the right direction.

The platypus’ eyes see the movement of the electrical signal, which is then processed by its brain.

The platypus cannot process electrical signals because it is a platypus.

The platypus’ bill detects the movement of the electrical signal, which is then processed by its brain.

Explanation

The passage explains that platypus use electroreception signals via their bills to locate prey. Their bill may first detect the signal, but their brains must process the signal to then begin their hunt. Remember that the brain processes all information received from the senses.

9

If a bike traveled in , how fast was the bike traveling?

Explanation

To answer this question, we need to recall the formula for speed:

We can plug in the known values from the question to solve:

10

Plants do not have structures that aid in their survival.

True

False

Explanation

This statement is false. Plants have many structures that are suited for survival. Leaves, roots, flowers, petals, stems, and seeds are all examples of a structure that a plant has that keeps it alive. Each feature plays a specific part in the plant's survival. Plants have adapted to their surroundings to have the best opportunity at life.

Page 1 of 95