Cycles of Life: Exploring Water, Carbon, and Nitrogen Dynamics

The video tutorial explains the flow of energy and cycling of matter in ecosystems, focusing on the water, carbon, and nitrogen cycles. It details processes like evaporation, transpiration, photosynthesis, and nitrogen fixation. The tutorial also covers the greenhouse effect and its impact on Earth's climate due to human activities.

Which of the following is NOT one of the main cycles in an ecosystem?

• Carbon cycle

• Nitrogen cycle

• Water cycle

• Oxygen cycle

What process in the water cycle involves plants releasing water from their leaves?

• Evaporation

• Precipitation

• Transpiration

• Condensation

During which process do water molecules bunch together to form clouds?

• Evaporation

• Transpiration

• Condensation

• Precipitation

In the carbon cycle, what process involves plants using carbon dioxide to produce energy?

• Combustion

• Photosynthesis

• Respiration

• Decomposition

What is the process called when animals release carbon dioxide as they breathe?

• Combustion

• Decomposition

• Photosynthesis

• Respiration

Which process in the carbon cycle involves the breakdown of dead plants and animals?

• Photosynthesis

• Combustion

• Decomposition

• Respiration

What is the role of bacteria in the nitrogen cycle?

• They store nitrogen in plants

• They consume nitrogen

• They release nitrogen into the atmosphere

• They fix nitrogen into usable forms

What is the process called when nitrogen is returned to the atmosphere?

• Nitrogen fixation

• Decomposition

• Combustion

• Denitrification

Which two gases are primarily responsible for the greenhouse effect?

• Oxygen and nitrogen

• Carbon dioxide and water vapor

• Methane and ozone

• Hydrogen and helium

What human activities are contributing to the increase in greenhouse gases?

• Planting trees

• Burning fossil fuels

• Using solar panels

• Recycling waste