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Unit 6 Review
Test Description: Energy Flow and Cycling of Matter
Instructions: Answer all questions to get your test result.
1) Animals are consumers, meaning they need to eat food for energy because they cannot make their own. What energy transformation is taking place when an animal eats food so it can keep warm?
A
mechanical to thermal
B
radiant to chemical
C
chemical to thermal
D
mechanical to radiant
2) When a person eats too much food, they store the extra energy as fat. What type of energy transformation is occurring in the body as energy from food is turned into fat?
A
mechanical to thermal
B
thermal to radiant
C
chemical to chemical
D
thermal to chemical
3) In a community with hawks, coyotes, tarantulas, snakes, ants, rats, cacti and sagebrush what would happen with a large decrease in rats?
A
There will be a decrease in the number of cacti and sagebrush plants.
B
There will be a decrease in the number of snakes, coyotes, and hawks.
C
There will be an increase in the number of snakes, coyotes, and hawks.
D
There will be an increase in the number of ants, tarantulas and snakes.
4) What is missing? Carbon dioxide + Water produces Glucose + Oxygen
A
Electrical energy on the right side of the equation because electricity is produced from this reaction.
B
Electrical energy on the left side of the equation because electricity is needed for this reaction to occur.
C
Light energy on the right side of the equation because light is produced from this reaction.
D
Light energy on the left side of the equation because light is necessary for the reaction to occur.
5) Which of the following is not a consumer?
A
mosquito larvae
B
turtles
C
dragonfly larvae
D
plants
6) What concept does an energy pyramid demonstrate?
A
They pyramid explains how energy flows from the top to the bottom because the top is larger and needs the most energy.
B
An organism that appears at the top of the pyramid is always the largest compared to the organisms below it.
C
An energy pyramid shows the ratio of organisms needed at each trophic level in order to support the ecosystem.
D
The energy pyramid is a model that shows the transformation of energy between all organisms in an ecosystem.
7) When energy is passing through a food web, some of the energy is lost as heat. How much energy is passed from one level to the next?
A
90%
B
50%
C
10%
D
1%
8) What happens to the solar energy absorbed by plants during photosynthesis?
A
It is recycled by plants and returned to the atmosphere.
B
It is transformed into chemical energy.
C
It is converted into oxygen and glucose.
D
It is stored as heat within the plant for cellular functions.
9) Which of the following can undergo photosynthesis?
A
plants and fungi
B
animals and plants
C
animals and fungi
D
plants only
10) Which correctly describes the process of photosynthesis?
A
Radiant energy, water and glucose enter the leaf. Carbon dioxide and water exit.
B
Radiant energy, oxygen, and glucose enter the leaf. Carbon dioxide and water exit.
C
Carbon dioxide, water and radiant energy enter the leaf. Glucose is formed and oxygen exits.
D
Radiant energy, oxygen and carbon dioxide enter the leaf. Glucose and water exit.
11) What kind of energy is necessary to initiate the process of photosynthesis?
A
electrical
B
heat
C
radiant
D
wind
12) Carbon dioxide + water + sunlight energy yields glucose + oxygen. Which molecule in the equation represents food energy made by plants?
A
oxygen
B
water
C
glucose
D
carbon dioxide
13) Mushrooms and bacteria serve an important role in an ecosystem, that of the decomposer. Why are decomposers important to the ecosystem?
A
They release stored energy and allow nutrients from dead organisms to be cycled back into the ecosystem.
B
They eat the dead animals in the ecosystem, cleaning the habitat.
C
They provide a direct food source for producers and consumers in the ecosystem.
D
They are not an important component in the ecosystem.
14) On an island, the old moose population decreased and the number of wolves increased. What conclusion is best supported by this?
A
Wolves do not prey on female moose and their calves.
B
Wolves prey on older moose.
C
Young moose are protected by their mothers.
D
Vegetation on the island decreases as the moose population ages.
15) What amount of stored chemical energy is passed from one trophic level to the next?
A
10%
B
5%
C
100%
D
90%
16) After observing a compost bin, a student wanted to investigate what microscopic organisms were living in it. What equipment would be needed to view the microscopic animals?
A
balance, hand lens, beaker
B
hot plate, stereoscope, tape measure
C
microscope, microscope slides, notebook
D
graduated cylinder, meter stick, thermometer
17) You enter the classroom and you see a lab procedure, a glass beaker with a blue liquid, a pipette, a glass graduated cylinder, a glass petri dish, leaves and goggles on your table. What should you do first?
A
Waft the beaker.
B
Wait for teacher directions.
C
Read the procedure.
D
Put on the goggles.
18) Which of the following would be a reason to wear goggles during a lab?
A
unknown blue liquid
B
All of these.
C
glass beaker
D
other glass objects
19) Which of these are producers?
A
Hawks and coyotes
B
Cacti and sagebrush
C
Ants and tarantulas
D
Rats and snakes
*select an answer for all questions
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