Carbon Cycle and Greenhouse Gases

The video explains the carbon cycle, focusing on processes that add and remove carbon from the atmosphere, such as combustion, respiration, photosynthesis, and diffusion. It discusses the relationship between carbon dioxide levels and global temperatures, highlighting the role of CO2 as a greenhouse gas. The video also covers the involvement of different spheres in the carbon cycle and examines historical CO2 trends, emphasizing the impact of human activities like fossil fuel combustion during the industrial revolution.

Which process involves the release of carbon from fossil fuels into the atmosphere?

• Photosynthesis

• Diffusion

• Combustion

• Respiration

What is the process called when carbon dioxide is absorbed by plants?

• Combustion

• Respiration

• Deforestation

• Photosynthesis

What happens to carbon during the process of diffusion?

• It is used by plants for growth

• It is converted into fossil fuels

• It is absorbed by water bodies

• It is released into the atmosphere

How does carbon dioxide affect global temperatures?

• It increases temperatures

• It has no effect

• It decreases temperatures

• It stabilizes temperatures

Which of the following is a greenhouse gas?

• Hydrogen

• Oxygen

• Nitrogen

• Carbon Dioxide

Which sphere contains fossil fuels like oil and coal?

• Geosphere

• Atmosphere

• Biosphere

• Hydrosphere

What is the role of carbonic acid in the carbon cycle?

• It is a greenhouse gas

• It is a byproduct of combustion

• It absorbs carbon from the atmosphere

• It releases carbon into the atmosphere

Which process is most impacted by human activities?

• Photosynthesis

• Respiration

• Diffusion

• Combustion

What has caused the dramatic rise in CO2 levels over the last 200 years?

• Increased photosynthesis

• Deforestation

• Industrial activities

• Natural cycles

Which activity contributes to the combustion process?

• Recycling waste

• Driving cars

• Planting trees

• Using solar panels