3rd Grade Science : Life Science

Study concepts, example questions & explanations for 3rd Grade Science

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Example Questions

Example Question #3 : Environmental Changes That Cause Problems

Plants will open their leaves during the daytime to collect sunlight. At night they will close their leaves up to conserve water.

This statement is an example of plants changing due to the environment.

Possible Answers:

False

True

Correct answer:

True

Explanation:

The statement in the question is correct. Plants reacting to the presence of sunlight or lack of the sun is a change in the environment, and the plants are adapting as necessary. The plants are reacting and making a change based on their environment and the changes happening around them. The plants are responding to the daily cycle of light and dark. This environmental change causes the plants to open or close their leaves, and it is done daily.

Example Question #1 : Explain How Plants May Change Due To Environmental Changes

Chloe added some new plants to her garden that she got from a friend. She noticed within a few days, her plants were getting brown spots, and the leaves were wilting. She saw spots like this on her friend's plants but didn't think anything of it. She researches it and thinks her plants might be sick.

What could Chloe have done differently to keep the plants from changing?

Possible Answers:

Buy new pots for all the plants so they will match.

Trade the old plants with her friend so she can keep the new ones.

Keep the new plants separate until they are not sick anymore.

Plant them in the ground so the soil can heal them.

Correct answer:

Keep the new plants separate until they are not sick anymore.

Explanation:

Chloe's plants have experienced an environmental change with the introduction of new plants. Chloe mentioned that she noticed spots on the plants she brought home but didn't pay much attention. This is a clue that the new plants were probably already sick. This type of environmental change is common in forests and natural areas as well. People plant invasive plants that wipe out notice plants or accidentally bring home diseased plants, and it spreads through the plants that are already living there.

Chloe should have kept the plants separate and not introduced them into the same environment until the new plants were no longer sick.

Example Question #1 : Explain How Plants May Change Due To Environmental Changes

Fruit and vegetable plants rely on pollinators to spread pollen from flower to flower for reproduction. To make new plants, the dust has to be transported.

Which answer choice(s) represent an environmental change that may affect the flowering plants?

Possible Answers:

Drought

Increase in pests

All of the answer choices are correct

Wildfire

Correct answer:

All of the answer choices are correct

Explanation:

All of the presented answer choices would affect the flowering plants. A drought would mean no water, which could be devastating for the plants because they rely on water to stay hydrated. Wildfires would wipe out the plants in the area, and they would be forced to regrow from the beginning of their life cycles. If there is an increase in pests in the habitat, the plants may be eaten or damaged, causing a negative effect.

Example Question #6 : Explain How Plants May Change Due To Environmental Changes

Which scenario below is an example of plants being affected by an environmental change?

Possible Answers:

Cindy throws away the dead leaves from a house plant.

Amelia gets a new potted plant from the store and adds it to her collection.

Robert gives his wife a bouquet of roses for their wedding anniversary.

Johnny's tomato plants withered and died during a drought.

Correct answer:

Johnny's tomato plants withered and died during a drought.

Explanation:

All of these scenarios feature plants, but only one highlights a change in the environment, which in turn affects the plants. The tomato plants were deprived of water due to the drought, so they withered and died. Plants need water to survive, and the change in the environment negatively affected the tomato plants.

Example Question #1 : Explain How Animals May Change Due To Environmental Changes

Environmental changes cannot cause problems for animals.

 

Possible Answers:

True

False

Correct answer:

False

Explanation:

This is a false statement. Environmental changes can cause significant problems for animals. If humans cut down a forest to build a new neighborhood, animals are displaced, maybe without homes, or food sources are lost. These would be terrible changes to the environment that would have long-lasting effects on animals.

Example Question #11 : Environmental Changes That Cause Problems

Birds that are migrating to California usually stop along the way to rest, eat, and drink water. The birds head to California to get away from the frigid weather in Canada. They would not survive without migrating. This year as the birds land at their usual stopping points, they notice it is hotter and dryer than average. As humans, we realize we are in a drought, but the birds do not know this. They are struggling to make the rest of the journey because it is too hot, and there is no water to drink.

How could the animals adjust their behaviors because of the environmental changes?

Possible Answers:

The birds may have to take a different route to their destination.

Birds cannot adjust their behaviors, so they are doomed.

The birds could bring water with them on the long journey.

The birds could stop migrating and just stay in the cold.

Correct answer:

The birds may have to take a different route to their destination.

Explanation:

The birds are facing more than one problem caused by the environment in this scenario. They have to get to California to stay out of the cold weather in Canada, but there is nowhere to rest with food and water on their current route. The birds may have to change their course to avoid the drought-ridden areas to survive the migration.

Example Question #11 : Environmental Changes That Cause Problems

What is a negative effect that an environmental change may have on an animal?

Possible Answers:

Jacey got a new puppy for a pet, and he loves fetching sticks in the yard.

A baby bird fell out of its nest and is now separated from its family.

New highways were built, and now the animals are being hit while trying to cross.

Spiders are nocturnal, so they hunt their food at night.

Correct answer:

New highways were built, and now the animals are being hit while trying to cross.

Explanation:

Animals can suffer adverse consequences that require them to change their behavior to survive. If animals are used to crossing through a wooded area to get to a food or water source, they will continue to do so even after a road or neighborhood is built. Animals will have to change this behavior to avoid being hit by vehicles.

Example Question #11 : Environmental Changes That Cause Problems

What does the term environmental change mean?

Possible Answers:

There is not a definition or meaning for the term environmental changes

When the weather changes from hot to cold

Human activities that create a new environment

A disturbance of the environment that causes changes

Correct answer:

A disturbance of the environment that causes changes

Explanation:

An environmental change is a disturbance that causes changes. It can be human-made or something caused by nature. It can cause plants and animals to adjust and adapt their behaviors to the new environment to survive.

Example Question #4 : Explain How Animals May Change Due To Environmental Changes

Which answer choice is an example of a change that an animal would NOT be able to make due to the environment changing?

Possible Answers:

Bat's improve their eyesight so they can see more insects as some species start to disappear.

Birds move to taller trees for nesting to stay away from neighborhood cats.

Orcas expand their hunting grounds so they can collect more food.

Alligators move to other water sources that have more food available due to overfishing.

Correct answer:

Bat's improve their eyesight so they can see more insects as some species start to disappear.

Explanation:

Animals often have to change their behaviors to adapt to changes in the environment. Bats would not be able to improve their eyesight to locate more insects suddenly. Bats have poor vision and use echolocation to find food; they cannot control their sight to make it easier for locating bugs. This is a change that they would not be able to do.

Example Question #142 : 3rd Grade Science

Environmental changes will only affect animals if they make temperatures warmer.

Possible Answers:

True

False

Correct answer:

False

Explanation:

This is a false statement. Environmental changes can cause significant problems for animals. These effects are not solely because of temperatures rising. If temperatures dropped and animals were not well-adapted or equipped to deal with the change, they may not survive. If forests are cut down, droughts occurred, or massive flooding engulfed an area, animals would be affected. These would be terrible changes to the environment that would have long-lasting effects on animals.

 

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