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- 1. Multiple Choice
Why is carbon dioxide important for plants?
Carbon dioxide gives plants their green color.
Plants can release carbon dioxide into the air.
Plants use carbon dioxide to make their own food.
Carbon dioxide lets plants absorb their roots.
- 2. Multiple Choice
What is the first element of the food web?
Eagle
Sun
Water
Wolf
- 3. Multiple Choice
Every ecosystem supplies the basic needs for the organisms that live there. What are the basic needs of all organisms?
Air, water, food, habitat
Food, water, habitat, space
Air, water, food, protection
Food, attention, change, water
- 4. Multiple Choice
During which stage of complete metamorphosis does an insect change itself completely from a larva to an adult?
Egg stage
Larva stage
Nymph stage
Pupa stage
- 5. Multiple Choice
Which organism in a food web is a producer?
Aphid
Beetle
Rosebush
Spider
- 6. Multiple Choice
Ecosystem change for many different reasons. Which of the following is a natural cause of changes in an ecosystem?
Farming
Housebuilding
Hurricanes
Pollution
- 7. Multiple Choice
Saguro Cacti live in parts of California, Arizona and Mexico. Gila woodpeckers build their nests inside saguro cacti. The saguro cacti and the gila woodpeckers are both part of the same:
atmosphere
ecosystem
food web
species
- 8. Multiple Choice
Which organisms release oxygen into the air as part of the carbon dioxide - oxygen cycle?
Consumers
Decomposers
Predators
Producers
- 9. Multiple Choice
Plants in a food web are:
consumers
decomposers
producers
suppliers
- 10. Multiple Choice
Which of the following statements is correct?
Every organism in an ecosystem eats plants to get energy.
Predators in an ecosystem get their energy directly from plants.
All organisms in an ecosystem get their energy from both living and non-living things.
Every animal in an ecosystem gets its energy from another organism in the ecosystem.
- 11. Multiple Choice
The purpose of a food chain is to show:
the flow of energy through an ecosystem.
the number of organism in an ecosystem.
how animals compete for food in an ecosystem.
the organism living near each other in an ecosystem.
- 12. Multiple Choice
Living things that make their own food using air, light, soil and water are called:
changers
consumers
decomposers
producers
- 13. Multiple Choice
People can affect environment in both good and bad ways. Which is one way that people can affect the environment in a good way?
Watering their lawns every day.
Reducing the amount of driving they do.
Sorting their trash before throwing it out.
Watching television specials about nature.
- 14. Multiple Choice
A porcupine is covered with a coat of sharp spines called quills. Quills help the porcupine survive in its environment by:
helping it locate sources of food.
keeping it warm in cold weather.
defending the porcupine from enemies.
making it easier for the porcupine to climb trees.
- 15. Multiple Choice
The plants process of making food and releasing oxygen into the air is called:
energy release
photosynthesis
the carbon cycle
the oxygen cycle
- 16. Multiple Choice
The falcon has a sharp, hooked beak. It also has sharp, curved claws called talons. The falcon's beak and talons are most likely adaptations for:
hiding
hunting
protection
swimming
- 17. Multiple Choice
Insects go through stages to grow and change form. This process is called:
adaptation
cycle
development
metamorphosis
- 18. Multiple Choice
If the mouse population disappeared from the ecosystem, the fox would most likely:
hunt owls and birds
eat grasses and grains
disappear from the food web
eat more rabbits and squirrels
- 19. Multiple Choice
Which of the following statements is correct?
Plants are the source of all energy in an ecosystem.
The removal of one organism would not affect an ecosystem.
All of the organisms within an ecosystem are important to its survival.
An increase in an organism's population would not affect an ecosystem.
- 20. Multiple Choice
Some insects hatch directly from eggs during incomplete metamorphosis. These young insects are called:
adults
larva
nymphs
pupa
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