4/9/09 Science Assessment Practice Questions

1. Which statement describes a species variation that could be created by interspecies interactions?

a. an arctic fox has a thicker coat of fur than a desert fox.

b. a gene mutates and produces as entirely new trait in an animal.

c. ants protect acacia trees from grasshoppers that eat their leaves.

d. pants on one side of a mountain have a large root system to survide dry conditions.

2. Which of these best identifies biotic factors in the forest environment?

a. plants, animals, and their surroundings; including wildflowers, birds, rocks and water.

b. the features of the habitat and decaying material; including soil, air, dead trees, and bacteria

c. the things living plants and animals need; including air ,water, soil, and nutrients

d. producers, consumers, and decomposers; including  wildflowers, deer,  songbirds, and mushrooms

3. Which statement describes an abiotic factor in the system?

a. the sun is shining in the sky

b. the frog is sitting on a lily pad

c. the butterfly is searching for food.

d. the plants are growing upright

4. Which statement describes only biotic factors in the forest ecosystem?

a. a bird and a squirrel are living in a tree.

b. birds and clouds are moving in the wind

c. sunlight, air, and water are used by grass

d. a fish, rocks, and a turtle exist within a stream

5. A group of students learned that there are many types of bacteria living inside their bodies. These bacteria are considered part of the biotic environment. Which statement best explains why?

a. they are living organisms

b. they provide nutrients  to their host.

c. they exist within other living organisms

d. they are dependent on other organisms.

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