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1. 
The ultimate source of energy in our Solar System comes from:
A.
water
B.
oxygen
C.
the sun
D.
forces with the earth
2. 
Sunlight provides light and thermal energy and is referred to as:
A.
wave energy
B.
radiant energy
C.
kinetic energy
D.
chemical energy
3. 
Autotrophs are at the beginning of all food chains because they:
A.
produce biomass
B.
get their energy from consumers
C.
produce their own energy
D.
produce radiant energy
4. 
Producers create energy by transforming ___________ to ____________.
A.
soil/glucose
B.
sugar/radiation
C.
chemical energy/radiant energy
D.
radiant energy/chemical energy
5. 
Plants are important to ecosystems because they:
A.
are instrumental in gas exchange between organsims
B.
help prevent damaging erosion
C.
provide energy for consumers
D.
all choices are correct
6. 
Autotroph means 'to feed oneself'. The process of an autotroph 'feeding' itself is called:
A.
chemosynthesis
B.
photosynthesis
C.
phototropism
D.
chemotropism
7. 
The REACTANTS in photosynthesis are:
A.
water and oxygen
B.
oxygen and carbon dioxide
C.
water and carbon dioxide
D.
sunlight and water
8. 
The products of photosynthesis are:
A.
glucose and oxygen
B.
oxygen and carbon dioxide
C.
water and oxygen
D.
carbon dioxide and glucose
9. 
Which correctly states the flow of energy in a food chain?
A.
sun--deer--grass--coyote
B.
deer--grass--sun--coyote
C.
sun--grass--deer--coyote
D.
sun-grass--coyote--deer
10. 
If a food chain includes: sun--grass--deer-coyote. What's missing?
A.
producer
B.
primary consumer
C.
secondary consumer
D.
tertiary consumer
11. 
Energy pyramids get small at the top to represent what?
A.
Energy is lost ate each trophic level as it flows through a food chain
B.
Organisms are smaller as you look down the food chain
C.
Each higher level consumer has fewer choices to feed on
D.
All choices are correct
12. 
Which organism would belong in the SECOND level of an energy pyramid?
A.
sun
B.
grass
C.
deer
D.
coyote
13. 
How much energy is passed on to the next trophic level in a food chain?
A.
100%
B.
90%
C.
25%
D.
10%
14. 
Which organism would most likely only eat producers?
A.
mouse
B.
racoon
C.
coyote
D.
snake
15. 
Which type of organism breaks down dead organisms and waste, returning important nutrients to the environment?
A.
Detritivore
B.
Herbivore
C.
Omnivore
D.
Carnivore
16. 
Which type of organism eats plants and meat?
A.
Detritivore
B.
Omnivore
C.
Carnivore
D.
Herbivore
17. 
Which statement correctly describes the flow of energy through the food chain to the right?
A.
Plants get their energy from insects.
B.
Peccaries are a source of energy for mice.
C.
Coyotes prey on peccaries for energy and nutrients.
D.
The bobcat population receives the most energy from its food.
18. 
Oxygen is a gas produced by ____ and used by _____
A.
plants and animals
B.
photosynthesis and carbon dioxide
C.
animals and plants
D.
carbon dioxide and photosynthesis
19. 
Which of the following removes carbon from the atmosphere?
A.
combustion
B.
respiration
C.
photosynthesis
D.
death
20. 
Organisms that do not decompose can be buried and become what?
A.
water
B.
nutrients
C.
air
D.
fossil fuels
21. 
If the plant population decreased, the amount of carbon would _________.
A.
stay the same
B.
increase
C.
decrease
22. 
Why do all organisms need nitrogen?
A.
To live and grow
B.
to build phosphorus
C.
To make oxygen levels grow
D.
To help blood circulate better
23. 
What percent of gases in the atmosphere does nitrogen make up?
A.
20%
B.
9%
C.
50%
D.
78%
24. 
After decomposers return the nitrogen into the soil, what transforms a small amount of nitrogen into nitrogen gas?
A.
Bacteria
B.
Carbon
C.
Phosphorus
D.
Proteins
25. 
How nitrogen is "fixed" into usable form for plants
A.
only through action of bacteria
B.
only through lightning
C.
through action of bacteria & lightning
D.
through photosynthesis
26. 
Organism that breaks down dead plants & animals and releases nitrogen back into atmosphere
A.
bacteria
B.
plants
C.
animals
D.
producers
27. 
How plants get the nitrogen they need
A.
from the air
B.
from the soil or water in which they live
C.
from the Sun
D.
from broken down rocks
28. 
Bacteria fix nitrogen on plant roots. Plant roots provide sugar to bacteria. This is an example of
A.
mutualism
B.
parasitism
C.
commensalism
D.
competition
29. 
Organisms that play a role in the nitrogen cycle
A.
animals
B.
plants
C.
bacteria
D.
plants, animals, & bacteria
30. 
What part of the water cycle does this picture show?
A.
condensation
B.
precipitation
C.
evaporation
D.
sublimation
31. 
Which is the opposite of condensation?
A.
runoff
B.
evaporation
C.
precipitation
D.
transpiration
32. 
Does evaporation happen before or after condensation?
A.
before
B.
after
C.
during
33. 
What is it called when plants give off water vapor as a waste product?
A.
condensation
B.
evaporation
C.
sublimation
D.
transpiration
34. 
Which stage does the #2 show in the diagram?
A.
condensation
B.
evaporation
C.
precipitation
D.
run off
35. 
Which stage does the #3 show in the diagram?
A.
condensation
B.
evaporation
C.
precipitation
D.
run off
36. 
what does the #4 show in the diagram?
A.
condensation
B.
evaporation
C.
precipitation
D.
run off