What is the carbon cycle?
Science Grade 8, Unit 5 Test

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Science
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8th Grade
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Hard
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1.
FLASHCARD QUESTION
Front
Back
The carbon cycle is the process by which carbon is exchanged among the atmosphere, land, water, and living organisms. It involves processes like photosynthesis, respiration, decomposition, and combustion.
2.
FLASHCARD QUESTION
Front
What is photosynthesis?
Back
Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy, usually from the sun, into chemical energy in the form of glucose, using carbon dioxide and water.
3.
FLASHCARD QUESTION
Front
What is cellular respiration?
Back
Cellular respiration is the process by which cells break down glucose and oxygen to produce energy (ATP), carbon dioxide, and water.
4.
FLASHCARD QUESTION
Front
What are producers in an ecosystem?
Back
Producers are organisms, such as plants and algae, that can make their own food through photosynthesis and serve as a food source for consumers.
5.
FLASHCARD QUESTION
Front
What are consumers in an ecosystem?
Back
Consumers are organisms that cannot produce their own food and rely on eating other organisms (plants or animals) for energy.
6.
FLASHCARD QUESTION
Front
What is the role of decomposers in an ecosystem?
Back
Decomposers, such as bacteria and fungi, break down dead organic matter, returning nutrients to the soil and making them available for producers.
7.
FLASHCARD QUESTION
Front
What is the biosphere?
Back
The biosphere is the global sum of all ecosystems, where life exists, including land, water, and the atmosphere.
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