Wednesday Warm Up

Within the carbon cycle, anything that absorbs more carbon from the atmosphere than it releases.

• carbon sink

• carbon source

Within the carbon cycle, anything that releases more carbon into the atmosphere than it absorbs.

• carbon sink

• carbon source

Select all that apply.

Which of the following are carbon sources.

• fossil fuel combustion

• volcanic eruptions

• forests

• oceans

Select all that apply.

Which of the following are carbon sinks.

• soil and rocks

• fossil fuels

• forests

• oceans

Forests are carbon sinks because they remove carbon dioxide from the atmosphere through ____________.

• combustion

• respiration

• photosynthesis

• decomposition

Human activities add greenhouse gases to the atmosphere, therefore we are carbon ________.

• sinks

• sources

Which of the following have been changed or altered due to climate change ?

• droughts

• flooding

• melting of polar ice caps

• all of the above

The average temperature of the surface of Earth has increased approximately 1°C in the past century. Which reason best explains this increase in temperature?

• lower levels of ozone in the atmosphere
• lower levels of nitrogen in the atmosphere
• higher levels of carbon dioxide and other greenhouse gases in the atmosphere
• higher levels of oxygen in the atmosphere

How do animals get carbon?

• By eating plants and or other animals.

• They absorb it from the atmosphere.

• From the ground

• They do not get carbon from anywhere.

The total amount of the carbon on Earth is constant.

• True

• False