Flow of Energy In Ecosystems
Starting with Question 8 they are in order through your spiral.
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Name and Period Number
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Your answer
Extra Credit 1: What organism did we study in the film: "In the Valley of the Wolves?"
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Your answer
Extra Credit 2: Is a human a producer, a primary consumer, or a secondary consumer?
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Your answer
Extra Credit 3:George walked for thirty minutes in the pouring rain without getting a single hair on his head wet. He didn't have a hat or an umbrella and his coat had no hood.
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Your answer
1. The flow of energy through living systems can be modeled as food chains, food webs, or energy pyramids. The energy organisms need to live and grow first enters the ecosystem when which of the following occurs?
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4 points
plants take in light energy from the sun
decomposers break down dead organisms
primary consumers eat plants for food
secondary consumers eat primary consumers
2. Matter is passed from the living part of an ecosystem to the non-living part when which of the following takes place?
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4 points
plants absorb gases
plants decompose
animals eat plants
animals drink water
Food Web Diagram
3. A food web diagram is provided above. Based on the diagram, it is reasonable to conclude that matter could follow which of the following paths as it cycles through this ecosystem?
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4 points
sun, grass, robin
plant seeds, field mouse, robin
eagle, deer, plant seeds
grass, deer, mountain lion
Predator/Prey in Four Ecosystems
4. An example of a predator and a prey species for four separate ecosystems is provided below. Which of the following would demonstrate an appropriate prediction for the changes to one of the populations of organisms due to a predator/prey interaction?
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4 points
When the population of sharks decreases because of fishing, the population of small fish will decrease.
After a period of heavy rainfall and warmer temperatures, the population of mosquitos will increase.
When abundant resources allow the population of mice to increase, the population of snakes will decrease.
During hunting season, when many deer are killed by hunters, the mountain lion population will decline
5. The energy organisms need to live and grow first begins to move through the ecosystem when–
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4 points
plants take in light energy from the Moon
decomposers break down dead organisms.
primary consumers eat plants for food.
secondary consumers eat primary consumers.
6. Green plants are producers. Producers bring energy into an ecosystem when they
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4 points
reproduce by generating seeds
absorb water and nutrients from soil.
release oxygen into the atmosphere.
make their own food using sunlight .
7. In a typical forest ecosystem, what will be true about the energy used in the system?
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4 points
All of it came, originally, from sunlight, converted to chemical energy by plants.
The total amount of energy will increase as every organism generates its own energy.
Eventually, the energy level will renew itself as it moves through the ecosystem.
No matter where the energy is used in the ecosystem, it will always be in the same form.
8. An organism that eats another organism is a/an
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4 points
producer
decomposer
consumer
alien
9. The position an organism occupies in a food web is known as a/an
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4 points
nutrient
matter cycle
energy transfer
trophic level
10. A horse is a secondary consumer.
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4 points
True
False
11. At what trophic level would you find a squirrel?
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4 points
Level 1, Producer
Level 2, Primary Consumer
Level 3, Secondary Consumer
12. In a food web, energy is_________ while matter is ___________________.
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4 points
increased, decreased
lost, recycled
replaced, restarted
carbon, oxygen
13. In the relationship between the living and nonliving environments, _____________ is used by plants to make food and released by consumers, while ______________ is used by consumers and released by plants.
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4 points
air, water
soil, nitrogen
sunlight, air
carbon dioxide, oxygen
14. Matter is recycled as it passes through an ecosystem.
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4 points
True
False
15. Using the chart on journal page 23, which of the following is NOT a biotic organism that requires water?
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4 points
rabbit
fish
soil
tree
16. Using the chart on journal page 23, which of the following does NOT provide carbon dioxide for the tree?
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4 points
rabbit
grass
fish
atmosphere
17. Animals get their energy by
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4 points
burning wood
eating other organisms
doing a lot of exercise
competing for food
18. What happens to most of the atoms that make up organisms when they die?
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4 points
they decompose and are returned to the soil as nutrients
they go straight into the air and mix with all the other atoms their
they flow on water into the sea
they are molded together to form new organisms
19. A trophic level is also known as a
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4 points
atomic particle
feeding level
racing level
energy cycle
20. Autotrophs are consumers, while heterotrophs are producers.
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4 points
True
False
21. Herbivores are secondary consumers at the third trophic level.
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4 points
True
False
22. Which of the following is an accurate example of a food chain?
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4 points
grass----mouse----tree
grass---dragonfly---bat
tree---bird---nest
gopher---snake---burrow
23. Which of the following statements is not true about an energy pyramid?
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4 points
98% of the sun's energy is absorbed by plants to make food
1-2% of the sun's energy is absorbed by plants to make food
primary consumers get their energy by eating plants
secondary consumers get their energy by eating other animals
24. Zooplankton is part of an aquatic ecosystem.
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4 points
True
False
25. Decomposers are
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4 points
musicians who break down their music
poets who burn their poems
teachers who change their lesson plans
students who create new ways to torture teachers
organisms that break down dead organisms and put their atoms back into the soil
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