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- 1. Multiple Choice
What trophic level is found at the very base of the pyramid?
Producers
Primary Consumers
Secondary Consumers
Top Consumers
- 2. Multiple Choice
What do we call the organisms that break down dead material?
Consumers
Producers
Decomposers
Omnivores
- 3. Multiple Choice
What kinds of food can secondary consumers eat?
Plants only
Animals only
Plants and animals both
- 4. Multiple Choice
What percent of energy is conserved (saved) with every move up the pyramid?
90%
50%
1%
10%
- 5. Multiple Choice
Why are producers important for ecosystems?
They provide all the energy to the ecosystem
They cannot easily be killed so they are a good food source
They create habitats for consumers
They are replaced quickly after being lost
- 6. Multiple Choice
If the producers in an ecosystem start with 25,000 kCal, how much energy will be left when you get to the secondary consumers?
2,500 kCal
250 kCal
25 kCal
2.5 kCal
- 7. Multiple Choice
Which of the following food chains would be accurate?
hawk --> snake --> rabbit --> grass
rabbit --> grass --> snake --> hawk
grass --> hawk --> rabbit --> snake
grass --> rabbit --> snake --> hawk
- 8. Multiple Choice
Which of the following is not an example of habitat loss?
Deforestation
Nature reserves
Beach erosion
Coral reef bleaching
- 9. Multiple Choice
What does it mean for an organism to be an invasive species?
It harms the other organisms that live near it
It moves in from another place and out competes with the native species
It is brought from somewhere and benefits it's new ecosystem
It grows quickly and can spread easily
- 10. Multiple Choice
Why should we be concerned about invasive species?
They can take over a whole native ecosystem
They usually are not useful to our economy (we can't make money off them)
They are unattractive and do not match native habitats
They are not edible by humans so we cannot eat them
- 11. Multiple Choice
Which of the following is NOT a reason invasive species can be so successful?
They have lots of space to reproduce in a new habitat
They will have lots of food in a new habitat
They will add nutrition and value to a new habitat
They usually do not have predators in a new habitat
- 12. Multiple Choice
Which of the following is NOT a reason deforestation is a problem?
Animals lose their habitat when trees are cut down
Trees pull CO2 out of the air, so when we cut trees down, we lose that ability
Trees create oxygen for humans and animals, so we will lose their oxygen production
New species can move in to a deforested area
- 13. Multiple Choice
What process do plants go through to make their own food?
Cellular respiration
Photosynthesis
- 14. Multiple Choice
What element is important in both photosynthesis and cellular respiration?
Carbon
Nitrogen
Phosphorus
Hydrogen
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