Science Revision

Humans are biotic factors in our environment. A. True B. False

True

Which is not needed for an ecosystem to support life? A. water B. mercury C. nutrients D. space

mercury

Rabbits are important grazers, maintaining some important grassland habitats. If another catastrophe were to reduce rabbit populations what would happen? A. Important grassland butterflies would be lost B. There would be more grass for the surviving rabbits C. The grassland would be invaded by trees and shrubs D. All of the above

All of the above

A decaying plant is considered an abiotic factor in an ecosystem. A. True B. False

FALSE

Soil does not affect where plants can live. A. True B. False

FALSE

All the energy in a food chain originates from: A. plant B. Farmers C. The Sun D. An electric outlet

The Sun

A nonliving factor such as light or temperature is a(n) _________________. A. organism. B. abiotic factor. C. range of tolerance. D. biotic factor.

abiotic factor

Which of the following best describes the types of things that make up an ecosystem? A. plants only B. all living and nonliving things C. only living things D. humans and animals

all living and nonliving things

Collectively, physical factors such as light, temperature, and moisture that affect an organism's life and survival are called the ___________ A. biotic environment B. ecosystem C. abiotic environment D. all of the above

biotic environment

Which is a biotic factor that affects the size of a population in a specific ecosystem? A. average temperature B. type of soil C. number and kinds of predators D. concentration of oxygen

number and kinds of predators

Which are examples of non-living things? A. chair, desk, window, dog B. dog, cat, frog, tree, wood C. plastic, cup, window, rock D. dinosaur, paper, pencil

plastic, cup, window, rock

What does shade provide for animals? A. sunlight B. protection C. hot temperatures D. nutrients

protection

Which is an abiotic factor in an ecosystem? A. ant B. decaying plant C. earthworm D. sand

sand

. Which of the following should replace the question mark below?Biotic factors - pine trees, squirrels, bacteria Abiotic factors - light, water, __________? A. soil B. ferns C. worms D. cacti

soil

A living thing will survive only __________. A. where its needs are met. B. in the desert. C. in the shade. D. in a polar ecosystem.

where its needs are met.