3rd Grade Science : Life Science

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

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Example Questions

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Example Question #1 : Life Science

Select the answer choice that is not a basic need of a human. 

Possible Answers:

Water

Food

Shelter 

Schooling 

Correct answer:

Schooling 

Explanation:

Basic needs are things that people need to survive. In order to survive, people require food, water, shelter, and clothing. Though schooling is an important benefit to help people be successful, it is not needed for survival. 

Example Question #1 : Life Science

Select the part of the plant that keeps a plant in the ground and absorbs water and nutrients. 

Possible Answers:

Roots

Leaves

Stems

Flowers

Correct answer:

Roots

Explanation:

The answers choices provide various parts of a plant:

Roots keeps a plant in the ground and absorbs water and nutrients.

Stems provide support for plants and carry water and nutrients from the roots to the leaves. 

Leaves are where the food is made in a plant. 

Flowers are essential for seed creation. 

The correct answer is roots. 

Example Question #2 : Life Science

Select the part of the plant that supports the plant and carries water and nutrients to the leaves. 

Possible Answers:

Roots

Flowers

Leaves

Stems

Correct answer:

Stems

Explanation:

The answers choices provide various parts of a plant:

Roots keeps a plant in the ground and absorbs water and nutrients.

Stems provide support for plants and carry water and nutrients from the roots to the leaves. 

Leaves are where the food is made in a plant. 

Flowers are essential for seed creation. 

The correct answer is stems. 

Example Question #1 : Life Science

Select the part of the plant where the food is made. 

Possible Answers:

Flowers

Stems

Roots

Leaves

Correct answer:

Leaves

Explanation:

The answers choices provide various parts of a plant:

Roots keeps a plant in the ground and absorbs water and nutrients.

Stems provide support for plants and carry water and nutrients from the roots to the leaves. 

Leaves are where the food is made in a plant. 

Flowers are essential for seed creation. 

The correct answer is leaves. 

Example Question #1 : Argue That Some Animals Form Groups For Survival

Why do animals form groups?

Possible Answers:

They do not form groups

They enjoy having friends

To help them survive

To do as they are told

Correct answer:

To help them survive

Explanation:

Animals form groups to increase their chance of survival. The animals work together to hunt, raise their young, protect each other, and more. Survival would be much more difficult if some animals lived on their own rather than in a group.

Example Question #1 : Why Animals Form Groups

Meerkats live in large families. Some are look-outs while others care for the young. Other meerkats are in charge of digging tunnels, and some are hunters. The meerkats will trade jobs and take turns.

Meerkat, Herd, Meerkats, Group, Rodents

Why does living in this large family benefit the meerkats?

Possible Answers:

The meerkats like having company around and other animals to play with.

There is no benefit to meerkats living in family groups; they just do it out of habit.

There are more members to split up the work and help with survival needs.

The meerkats don't have to do as much work, so they get to be lazier.

Correct answer:

There are more members to split up the work and help with survival needs.

Explanation:

Living in a large family benefits the meerkats because they can split up the work and have members of the family working together to keep the family safe and healthy. Rather than all of the work falling on a few animals, it can be split up amongst dozens. Living in large groups like this help with protection, food collection, and general survival.

Example Question #1 : Why Animals Form Groups

Elephants live in large herds. When traveling, they keep the babies in the middle of the line or center of the group.

Elephant, Serengeti, National Park

How do these large groups help babies survive?

Possible Answers:

The group allows babies to drink more water.

The group keeps the babies from seeing the scenery.

These groups do not help babies survive.

These groups protect babies from predators.

Correct answer:

These groups protect babies from predators.

Explanation:

Large herds of elephants can be seen moving across the plains of Africa with their babies in the middle of the group's lines as they travel. If predators attack them, the babies are usually targets because they are smaller and weaker. If the female elephants keep them hidden and guarded, they are protected. This technique is to help babies survive.

Example Question #1 : Why Animals Form Groups

Fish are one of many animals who form groups for survival. They will form "bait balls" with hundreds (even thousands) of fish to scare away predators and make it more difficult for predators to catch them.

School, Fish, Underwater, Tropical

Fish form these groups to help them _____________.

Possible Answers:

swim

survive

splash

hunt

Correct answer:

survive

Explanation:

Fish form these "bait balls" to distract their predators and make it more difficult for them to be eaten. This technique is all about survival. Forming groups makes each fish safer than if they were swimming alone.

Example Question #2 : Why Animals Form Groups

How do groups help animals to survive?

Possible Answers:

It helps them to find food, care for young, and protect one another

It does not help them to survive; it makes their lives worse

It helps them to feel less lonely, have more fun, and play together

It allows them to look cooler like they have more friends

Correct answer:

It helps them to find food, care for young, and protect one another

Explanation:

Living in groups provides animals with many benefits. A large group of animals is less likely to be bothered by predators, there are more females to care for and protect the young, and more members to look for food sources. Working together provides them with more opportunities for survival than living alone does.

Example Question #1 : Life Science

Which answer choice(s) is a benefit of animals forming groups?

Possible Answers:

Animals can assist each other with jobs and tasks when in a group.

Animals can help to protect each other when in groups.

All of the answer choices are correct.

Animals help each other raise the babies in the group.

Correct answer:

All of the answer choices are correct.

Explanation:

All of the answer choices list a benefit to animals forming groups. When animals form groups for survival, they can help each other raise the young, hunt, keep watch, gather food, find shelter, and survive. Animals in groups have more eyes looking for predators or prey. They also have less work to do individually because they can share the workload. Animals in groups often survive better than if they lived alone.

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