Unit 6 Review Question Preview (ID: 41240)
Energy Flow And Cycling Of Matter.
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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) Wait for teacher directions.
b) Put on the goggles.
c) Waft the beaker.
d) Read the procedure.
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) microscope, microscope slides, notebook
b) graduated cylinder, meter stick, thermometer
c) balance, hand lens, beaker
d) hot plate, stereoscope, tape measure
What amount of stored chemical energy is passed from one trophic level to the next?
a) 10%
b) 5%
c) 90%
d) 100%
On an island, the old moose population decreased and the number of wolves increased. What conclusion is best supported by this?
a) Wolves prey on older moose.
b) Young moose are protected by their mothers.
c) Vegetation on the island decreases as the moose population ages.
d) Wolves do not prey on female moose and their calves.
Carbon dioxide + water + sunlight energy yields glucose + oxygen. Which molecule in the equation represents food energy made by plants?
a) glucose
b) carbon dioxide
c) water
d) oxygen
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.
What kind of energy is necessary to initiate the process of photosynthesis?
a) radiant
b) heat
c) electrical
d) wind
Which correctly describes the process of photosynthesis?
a) Carbon dioxide, water and radiant energy enter the leaf. Glucose is formed and oxygen exits.
b) Radiant energy, water and glucose enter the leaf. Carbon dioxide and water exit.
c) Radiant energy, oxygen, and glucose enter the leaf. Carbon dioxide and water exit.
d) Radiant energy, oxygen and carbon dioxide enter the leaf. Glucose and water exit.
Which of the following can undergo photosynthesis?
a) plants only
b) animals and plants
c) plants and fungi
d) animals and fungi
What happens to the solar energy absorbed by plants during photosynthesis?
a) It is transformed into chemical energy.
b) It is recycled by plants and returned to the atmosphere.
c) It is converted into oxygen and glucose.
d) It is stored as heat within the plant for cellular functions.
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) 10%
b) 1%
c) 50%
d) 90%
Which of the following is not a consumer?
a) plants
b) turtles
c) mosquito larvae
d) dragonfly larvae
What concept does an energy pyramid demonstrate?
a) An energy pyramid shows the ratio of organisms needed at each trophic level in order to support the ecosystem.
b) The energy pyramid is a model that shows the transformation of energy between all organisms in an ecosystem.
c) An organism that appears at the top of the pyramid is always the largest compared to the organisms below it.
d) They pyramid explains how energy flows from the top to the bottom because the top is larger and needs the most energy.
What is missing? Carbon dioxide + Water produces Glucose + Oxygen
a) Light energy on the left side of the equation because light is necessary for the reaction to occur.
b) Light energy on the right side of the equation because light is produced from this reaction.
c) Electrical energy on the right side of the equation because electricity is produced from this reaction.
d) Electrical energy on the left side of the equation because electricity is needed for this reaction to occur.
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 snakes, coyotes, and hawks.
b) There will be an increase in the number of ants, tarantulas and snakes.
c) There will be an increase in the number of snakes, coyotes, and hawks.
d) There will be a decrease in the number of cacti and sagebrush plants.
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) chemical to chemical
b) mechanical to thermal
c) thermal to chemical
d) thermal to radiant
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) chemical to thermal
b) mechanical to radiant
c) mechanical to thermal
d) radiant to chemical
Which of the following would be a reason to wear goggles during a lab?
a) All of these.
b) unknown blue liquid
c) glass beaker
d) other glass objects
Which of these are producers?
a) Cacti and sagebrush
b) Hawks and coyotes
c) Ants and tarantulas
d) Rats and snakes
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