Cycles Review

Front

What is decomposition in the context of the oxygen cycle?

Back

Decomposition is the process by which organic substances are broken down into simpler organic or inorganic matter, releasing oxygen back into the atmosphere.

Front

Which spheres of Earth are involved in the oxygen cycle?

Back

The oxygen cycle involves the biosphere, atmosphere, and lithosphere, but not the geosphere.

Front

What percentage of Earth's atmosphere is made up of oxygen?

Back

21% of Earth's atmosphere is composed of oxygen.

Front

What is evaporation in the water cycle?

Back

Evaporation is the process where liquid water changes into water vapor, contributing to the water cycle.

Front

Which process is NOT one of the four main processes of atmospheric oxygen?

Back

Photosynthesis is NOT one of the four main processes of atmospheric oxygen; the main processes include respiration, combustion, rusting, and decomposition.

Front

What role does photosynthesis play in the oxygen cycle?

Back

Photosynthesis is the process by which green plants use sunlight to convert carbon dioxide and water into glucose and oxygen, thus replenishing atmospheric oxygen.

Front

Define the term 'water cycle'.

Back

The water cycle is the continuous movement of water on, above, and below the surface of the Earth, involving processes such as evaporation, condensation, and precipitation.

Front

What is the significance of the oxygen cycle?

Back

The oxygen cycle is crucial for maintaining the balance of oxygen in the atmosphere, which is essential for the survival of aerobic organisms.

Front

Explain the process of condensation in the water cycle.

Back

Condensation is the process where water vapor cools and changes back into liquid water, forming clouds.

Front

What is transpiration in the context of the water cycle?

Back

Transpiration is the process by which water is absorbed by plants and then released as water vapor into the atmosphere.