8.11c

Which process involves cells obtaining energy by combining glucose and oxygen?

• Photosynthesis

• Respiration

• Carbon cycle

• Hydrosphere

Answer explanation

Respiration is the process where cells obtain energy by breaking down glucose in the presence of oxygen, producing carbon dioxide and water as byproducts. This is essential for cellular energy production.

Tags

NGSS.MS-LS1-7

Through what do carbon atoms move when animals eat plants?

• Atmosphere

• Food web

• Hydrosphere

• Geosphere

Answer explanation

Carbon atoms move through the food web when animals eat plants, as they transfer energy and nutrients from one organism to another, illustrating the interconnectedness of ecosystems.

Tags

NGSS.MS-LS2-3

How does carbon move from living things into the atmosphere?

• Through the geosphere

• By burning fossil fuels

• Through photosynthesis

• By dissolving in water

Answer explanation

Carbon moves from living things into the atmosphere primarily by burning fossil fuels, which releases stored carbon as CO2. Other processes like photosynthesis and dissolving in water do not directly transfer carbon to the atmosphere.

Tags

NGSS.HS-ESS2-6

NGSS.HS-LS2-5

Where is carbon stored in rocks and soil?

• Atmosphere

• Hydrosphere

• Geosphere

• Biosphere

Answer explanation

Carbon is primarily stored in the geosphere, which includes rocks and soil. This storage occurs in the form of carbonates and organic matter, making the geosphere a significant carbon reservoir.

What happens to carbon when fossil fuels are burned?

• It moves to the soil

• It moves to the atmosphere

• It dissolves in water

• It is stored in rocks

Answer explanation

When fossil fuels are burned, carbon is released into the atmosphere as carbon dioxide (CO2), contributing to greenhouse gas emissions and climate change.

Tags

NGSS.MS-ESS3-4

What are large, natural reservoirs where carbon is stored called?

• Carbon sources

• Carbon sinks

• Geosphere

• Hydrosphere

Answer explanation

Large, natural reservoirs that store carbon are known as carbon sinks. They play a crucial role in mitigating climate change by absorbing more carbon dioxide than they release.

Which of the following is an example of a carbon sink?

• Volcanoes

• Factories

• Forests

• Forest fires

Answer explanation

Forests act as carbon sinks by absorbing carbon dioxide from the atmosphere during photosynthesis, thus helping to mitigate climate change. In contrast, volcanoes, factories, and forest fires release carbon rather than sequester it.

Tags

NGSS.MS-LS2-3

What releases carbon dioxide into the atmosphere?

• Carbon sinks

• Carbon sources

• Hydrosphere

• Geosphere

Answer explanation

Carbon sources, such as fossil fuels and deforestation, release carbon dioxide into the atmosphere. In contrast, carbon sinks absorb CO2, making carbon sources the correct choice for this question.

What is an example of a process that releases carbon dioxide into the atmosphere?

• Photosynthesis

• Respiration

• Carbon cycle

• Geosphere

Answer explanation

Respiration is a process where organisms convert glucose and oxygen into energy, releasing carbon dioxide as a byproduct. In contrast, photosynthesis absorbs carbon dioxide, making respiration the correct choice for this question.

Which of the following substances necessary for human life is produced by ocean organisms that photosynthesize?

• Nitrogen

• Oxygen

• Carbon dioxide

• Helium

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3