Biogeochemical cycles

What is a biogeochemical cycle?

• matter and energy circulation through living beings and the environment

• matter circulation through the environment

• energy circulation through living beings and the environment

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Which are the main reservoirs of water?

• oceans

• earth

• oceans and earth

• oceans, earth, and atmosphere

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Where is the largest phosphorus reserve found?

• in the ground

• in the rocks

• in sea sediments

What is the process that extracts phosphorus from the rocks?

• sedimentation

• petrification

• weathering

• erosion

How is phosphorus returned to the atmosphere?

• by the actions of decomposers

• by the actions of erosion

• by the actions of weathering

Why is phosphorus important in animals?

• It intervenes in energy transference

• it is an important component of genetic material

• intervenes in complex biochemical reactions

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What are the products of the photosynthesis process?

• carbon dioxide + water

• glucose + water

• glucose + oxygen

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What is Ozone?

• It is a gas composed of two molecules of oxygen

• It is a gas composed of three molecules of oxygen

• It is a gas composed of two oxygen and one hydrogen molecules

Why is Ozone important for living beings?

• Because it forms a layer that protects the Earth from the UV rays

• Because it forms a layer that keeps the Earth warm

• Because is important for the decomposition process

How is Carbon Dioxide released and returned to the atmosphere?

• by the process of photosynthesis

• by the process of weathering

• by burning fossil fuels

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