Science Unit 2 Leap Review

3rd Grade Unit 2
Inheritance of Traits
Practice test slides

Standards: 3-LS1-1, 3-LS2-1, 3-LS3-1, 3-LS3-2

Which statement explains the most likely reason why the spoonbills in the zoo have a paler pink color than
those in the wild?
A. Spoonbills in the zoo live very close to fresh water.

B. Spoonbills in the zoo sit in the sun for much of the day.

C. Spoonbills in the zoo are older than spoonbills in the wild.

D. Spoonbills in the zoo have a different diet than spoonbills in the wild.

1 of 5

2 of 5

Part A Which statement best explains a reason why musk oxen live in groups?

A. It allows them to share their food.

B. It allows them to provide shade for their young.

C. It allows them to travel a long way without getting lost.

D. It allows them to stay warm when the tundra is very cold.

Part B A student argues that a group of musk oxen face out when forming a circle as shown in
Image 3 because it helps them survive. Which statement is evidence that best supports the
student’s argument?

A. Oxen face outward toward the Sun so that the herd stays warmer.

B. Oxen face outward to defend against predators by hiding their young inside the circle.

C. Oxen face outward so that they can walk while pressed together to travel long distances.

D. Oxen face outward so that they are better able to find food by seeing in all directions at once.

3 of 5

Female caribou in a herd all give birth at the same time. They gather in large
groups with their babies. How does staying with the herd instead of going off by
themselves help the female caribou?

A. In a large herd, more individuals can keep watch for predators than can a lone
individual.

B. In a large herd, more individuals are able to hunt for food than can a lone
individual.

C. In a large herd, fewer individuals are needed to care for more young.

D. In a large herd, fewer individuals are likely to become sick or injured.

4 of 5

Why do caribou and musk oxen form larger herds in the winter than in the
summer?

A. It is harder for smaller herds to find food in the summer than in the winter.

B. It is easier for larger herds to travel long distances in the summer than in the
winter.

C. Larger herds can defend themselves better against predators than smaller herds
can.

D. Smaller herds do not blend in as well with their environment in the winter as
larger herds do.

5 of 5

1 of 2

2 of 2

Item Set: Burmese Pythons

1 of 10

2 of 10

3 of 10

4 of 10

5 of 10

6 of 10

7 of 10

8 of 10

9 of 10

10 of 10

1 of 6

2 of 6

3 of 6

4 of 6

5 of 6

6 of 6

Let’s work together to Score these student Responses! Use the Rubric on this slide to score
each response.