OAT Practice 5 th Grade Science Life Science. Brought to you by:

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1 OAT Practice 5 th Grade Science Life Science Brought to you by:

2 Many plants and animals live in and around the pond. One year the pond dried up. 1) Which organism in the pond ecosystem was still able to take in oxygen? A. Turtle B. Trout C. Sunfish D. Tadpole

3 1) Which organism in the pond ecosystem was still able to take in oxygen? A. Turtle This is the correct answer. The only organism with lungs is the turtle, so the turtle has to breathe air to take in oxygen. The other animals listed have to get oxygen from water because they have gills and not lungs. So if the pond dried up, only the turtle could still take in oxygen. B. Trout If a student chooses B, he or she may be choosing the largest organism, but the trout has gills and takes in oxygen from the water. C. Sunfish If a student chooses C, he or she may think that the sunfish spends time out of the water, sunbathing like the turtle. The turtle has lungs; therefore, the sunfish must have lungs. The sunfish has gills and takes in oxygen from the water. D. Tadpole If a student chooses D, he or she may think that a tadpole can breathe out of water because frogs can breathe out of water. Tadpoles have gills and take in oxygen from the water.

4 In the winter, the pond starts to freeze. The ducks leave the pond. They migrate to warmer climates. 2) Which statement explains one reason why ducks migrate? A. The ducks have too many enemies. B. The ducks have difficulty finding food. C. The ducks have to lay eggs near water. D. The ducks have too few places to hibernate.

5 2) Which statement explains one reason why ducks migrate? A. The ducks have too many enemies. If a student chooses A, he or she may think that more predators come to the ecosystem (environment) in the winter, but there are usually fewer predators in the winter because many mammals hibernate (sleep through the winter) and birds that are predators usually migrate (fly south for the winter). B. The ducks have difficulty finding food. This is the correct response. C. The ducks have to lay eggs near water. If a student chooses C, he or she may think that ducks lay their eggs in the winter, but ducks usually lay their eggs in the spring. D. The ducks have too few places to hibernate. If a student chooses D, he or she may think that ducks hibernate during the winter, but ducks do not hibernate; they migrate to warmer places.

6 3) Which organism uses sunlight to produce food that others eat? A. Snail B. Sunfish C. Butterfly D. Green Algae

7 3) Which organism uses sunlight to produce food that others eat? A. Snail If a student chooses A, he or she may think that snails can make food by photosynthesis. Plants are capable of photosynthesis. Snails are not plants so they cannot make food by photosynthesis. B. Sunfish If a student choose B, he or she may think that fish can make food by photosynthesis. Fish are not plants so they cannot make food by photosynthesis. C. Butterfly If a student chooses C, he or she may think that butterflies are active during the day so they must use sunlight to make food. Butterflies are not plants so they cannot make food by photosynthesis. D. Green Algae This is the correct answer. Green algae use sunlight to make sugar. Other organisms in the habitat eat the green algae. The green algae are producers in the habitat.

8 4) Which organism in the pond ecosystem completely changes its physical features and food source when it becomes an adult? A. Duck B. Turtle C. Trout D. Butterfly

9 4) Which organism in the pond ecosystem completely changes its physical features and food source when it becomes an adult? A. Duck If a student chooses A, he or she may think that ducks eat different things when they are adults because ducks change color as they mature, but ducks have the same shape and eat the same things their entire life. B. Turtle If a student chooses B, he or she may think that turtles do not grow a shell until they are adults, but turtles have a shell and eat the same things their entire life. C. Trout If a student chooses C, he or she may think that trout change their diet and how they look when they swim upstream. Although young trout eat different things than do adults, juvenile trout look very similar to adult trout. D. Butterfly This is the correct answer. The butterfly looks different at each stage of its life cycle. It changes from a caterpillar to a butterfly. Caterpillars eat leaves and adults eat plant fluids (if they eat at all).

10 5) Which seed has structures that allow animals to transport the seed on their fur? A. B. C. D.

11 5) Which seed has structures that allow animals to transport the seed on their fur? A. If a student chooses A, he or she may think that the smooth surface of the corn seed will make it stick to an animal s fur. But actually, the corn seed s surface is so smooth that it won t stick to the fur. B. C. This is the correct answer. The cocklebur is a seed that is covered with spines. The spines of the cocklebur stick to the fur as an animal passes by it. The seed stays on the animal until it falls off when the animal rubs against something or picks the seed off its fur. If a student chooses C, he or she may know that this type of seed is carried by wind. But this seed is thin, light and does not easily stick to an animal s fur. D. If a student chooses D, he or she may think that an acorn s stem will help it to stick to the animal s fur. But acorns are large and heavy and do not stick to an animal s fur.

12 6) In a forest, how do decomposers help other organisms survive? A. They release oxygen into the air that animals breathe. B. They put nutrients into the soil that plants use to grow. C. They provide shelter in forests where animals can hide. D. They use sunlight to make food for plants and animals.

13 6) In a forest, how do decomposers help other organisms survive? A. They release oxygen into the air that animals breathe. If a student chooses A, he or she may be thinking of producers (plants). Producers take energy from the sun and change it into a form of energy that can be used by living things. B. They put nutrients into the soil that plants use to grow. This is the correct answer. Decomposers break down dead material (plants, animals, and their wastes). They break down this dead material into nutrients. Plants then remove these nutrients from the soil and use them to grow and live. C. They provide shelter in forests where animals can hide. If a student chooses C, he or she may be thinking that because some decomposers (fungi) are organisms that grow in trees, that makes them a good hiding place. It is the tree that is a good shelter or habitat for other animals, not the decomposer (fungi). D. They use sunlight to make food for plants and animals. If a student chooses D, he or she may be thinking of producers (plants). Producers make food by using sunlight (photosynthesis). Decomposers are usually fungi, bacteria, or worms, and they cannot use sunlight to make food for plants and animals.

14 Some Animals Found in Ohio 7) Which animals give birth to live young? A. hawk and black bear B. beaver and black bear C. hawk and potato beetle D. beaver and potato beetle

15 7) Which animals give birth to live young? A. hawk and black bear If a student chooses A, he or she may think that hawks give birth to live young. Hawks are birds and hawks lay eggs, which hatch after incubation in the nest. B. beaver and black bear This is the correct answer. Beavers and black bears are mammals. Most mammals give birth to live young. C. hawk and potato beetle If a student chooses C, he or she may think that these animals give birth to live young. This is incorrect, because both the hawk and the beetle lay eggs. D. beaver and potato beetle If a student chooses D, he or she may think that potato beetles give birth to live young because they think that only birds lay eggs. This is incorrect: beetles also lay eggs.

16 A teacher gives students five rock samples to describe and sketch. The students record their observations in the table below. The limestone sample was found in an area of Wyoming that is now a desert. 8) Which statement describes what scientists can learn from the rock? A. There once was a lake in that area. B. There once was a glacier in that area. C. There once were a lot of trees and plants in that area. D. There once were fish that lived on dry land in that area.

17 8) Which statement describes what scientists can learn from the rock? A. There once was a lake in that area. This is the correct answer. The fish fossil found in the limestone sample means that in the past there must have been water where the sample was found. Limestone forms chemically in solution. Water is required to form limestone. B. There once was a glacier in that area. If a student chooses B, he or she may think that limestone is formed by glaciers (mountains of ice). But limestone is formed in water and fish do not live in glaciers. C. There once were a lot of trees and plants in that area. If a student chooses C, he or she may link trees and plants with fish. The rock only contains a fish fossil. There is no evidence of plants or trees based on examination of the rock. D. There once were fish that lived on dry land in that area. If a student chooses D, he or she may think that fish lived on dry land at some point in time, but fish need to live in water to survive.

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