Environmental Science Unit 2.1 - biogeochemical cycles

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What is a biogeochemical cycle?

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A biogeochemical cycle is the movement of elements and compounds through living organisms and the physical environment, involving biological, geological, and chemical processes.

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Why is burning fossil fuels harmful?

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It increases the amount of carbon dioxide and greenhouse gases in the air.

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Which process does not add CO2 to the atmosphere?

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Planting trees.

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What percentage of Earth's oxygen is produced by phytoplankton?

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More than half of Earth's oxygen is created by phytoplankton in the ocean.

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What is precipitation?

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Precipitation is the process of water falling out of clouds in our atmosphere and returning back to Earth.

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What type of energy is involved in pushing a filing cabinet across the room?

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Mechanical energy.

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What is the greenhouse effect?

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The greenhouse effect is the warming of Earth's surface due to the trapping of heat by greenhouse gases in the atmosphere.

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What role do trees play in the carbon cycle?

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Trees absorb carbon dioxide during photosynthesis, helping to reduce the amount of CO2 in the atmosphere.

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What is photosynthesis?

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Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll.

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What are greenhouse gases?

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Greenhouse gases are gases that trap heat in the atmosphere, including carbon dioxide, methane, and nitrous oxide.

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