Understanding the Oxygen Cycle

Which of the following is considered a major reservoir of oxygen on Earth?

• The Earth's core

• The atmosphere

• The Earth's mantle

• The Earth's crust

What process primarily contributes to the release of oxygen into the atmosphere?

• Respiration

• Photosynthesis

• Combustion

• Decomposition

Tags

NGSS.MS-LS1-6

Which of the following is a significant way oxygen is removed from the atmosphere?

• Photosynthesis

• Evaporation

• Respiration

• Precipitation

Tags

NGSS.MS-LS1-6

In which form is oxygen most commonly found in the Earth's crust?

• Silicate minerals

How does oxygen contribute to the process of weathering rocks?

• By forming carbonic acid

• Through oxidation reactions

• By dissolving minerals

• By freezing and thawing

Tags

NGSS.MS-PS1-2

Which of the following best describes the role of the oxygen cycle in supporting life on Earth?

• It provides energy for cellular processes.

• It regulates Earth's temperature.

• It supplies oxygen for respiration.

• It controls the water cycle.

What is the primary role of marine phytoplankton in the oxygen cycle?

• They consume oxygen during photosynthesis.

• They release oxygen through respiration.

• They produce oxygen through photosynthesis.

• They store oxygen in their cells.

Tags

NGSS.MS-LS1-6

Which of the following processes is responsible for the conversion of oxygen into ozone in the stratosphere?

• Photosynthesis

• Respiration

• Photodissociation

• Combustion

What is the significance of the ozone layer in the context of the oxygen cycle?

• It absorbs harmful ultraviolet radiation.

• It releases oxygen into the atmosphere.

• It stores carbon dioxide.

• It regulates Earth's temperature.

Which of the following statements about the oxygen cycle is true?

• Oxygen is only cycled through the atmosphere and biosphere.

• The oxygen cycle is independent of other biogeochemical cycles.

• Oxygen is cycled through the atmosphere, biosphere, hydrosphere, and lithosphere.

• Oxygen is only produced by terrestrial plants.