What is combustion?
Carbon Cycle

Quiz
•
Science
•
9th Grade
•
Hard
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15 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
A process of freezing substances in the presence of nitrogen.
A chemical reaction that involves the burning of substances, typically in the presence of oxygen, resulting in the release of energy, carbon dioxide, and water.
A method of purifying water through evaporation.
A reaction that absorbs energy and produces heat.
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What gas do humans depend on for survival?
Carbon Dioxide
Nitrogen
Oxygen
Hydrogen
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What is the significance of decomposition in the carbon cycle?
Decomposition helps in the formation of fossil fuels.
Decomposition is the process by which dead organic matter is broken down by decomposers, returning carbon to the soil and atmosphere, thus continuing the carbon cycle.
Decomposition prevents the release of carbon into the atmosphere.
Decomposition is the process of photosynthesis in plants.
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Why is the carbon cycle important?
It helps in the formation of fossil fuels.
It is essential for maintaining the balance of carbon in the environment, supporting life, and regulating the Earth's climate.
It increases the amount of carbon dioxide in the atmosphere.
It has no significant impact on the environment.
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What do plants depend on for photosynthesis?
Oxygen, sunlight, and minerals
Carbon dioxide, sunlight, and water
Nitrogen, heat, and soil
Hydrogen, sunlight, and air
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What role do plants play in the carbon cycle?
Plants absorb carbon dioxide from the atmosphere during photosynthesis and release oxygen, thus regulating atmospheric carbon levels.
Plants release carbon dioxide into the atmosphere during photosynthesis.
Plants do not play any significant role in the carbon cycle.
Plants only absorb oxygen from the atmosphere.
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What is a carbon sink?
A natural or artificial reservoir that absorbs and stores carbon from the atmosphere, such as forests, oceans, and soil.
A process that releases carbon dioxide into the atmosphere.
A type of plant that grows in carbon-rich environments.
A method of measuring carbon emissions in urban areas.
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