Carbon Cycle and Ecosystem Dynamics

What is the primary greenhouse gas that contributes to climate change?

• Carbon Dioxide

• Methane

• Oxygen

• Nitrogen

What is the process called where plants use sunlight and carbon dioxide to create stored energy in the form of carbohydrates?

• Respiration

• Photosynthesis

• Decomposition

• Combustion

How does energy primarily move through an ecosystem, starting from the sun?

• Through decomposition

• Through the food chain

• Through burning fossil fuels

• Through human respiration

What happens to carbon-based organisms like plants and animals when they get stuck in the Earth and are compressed under tons of pressure?

• They turn into soil

• They evaporate into the atmosphere

• They decompose into water

• They are turned into carbon-based fossil fuels

What human activity, prevalent since the Industrial Revolution, releases large amounts of stored carbon dioxide back into the atmosphere?

• Planting trees

• Decomposing waste

• Burning fossil fuels

• Eating plants

How do plants help balance the carbon cycle?

• By releasing oxygen and carbon dioxide

• By consuming animals

• By sucking up large amounts of carbon dioxide

• By producing fossil fuels

What effect does deforestation have on the carbon cycle?

• It increases the number of plants that store CO2

• It helps balance the cycle

• It reduces the plants that store CO2

• It has no significant effect

What is a key characteristic of sustainable technologies, as described in the video?

• They produce more output than input

• They create negative externalities

• Their output is equal to their input

• They rely solely on fossil fuels