Unit 1 Review- Aquatic Science

What is the process by which plants convert carbon dioxide into energy rich carbon compounds?

• Combustion

• Fossil Fuels

• Photosynthesis

• Decomposition

What percentage of the air is nitrogen?

• 78%

• 1%

• 0.5%

• 50%

When decomposition is blocked in the carbon cycle, what may be available?

• photosynthesis

• exhaling Carbon Dioxide

• fossil fuels

• absorption of carbon dioxide

Which terms are considered part of the nitrogen cycle?

• ammonification

• nitrification

• denitrification

• consumption

A carbon store is a natural or artificial sink that accumulates and stores carbon-containing chemical compounds. Which of the following is not a carbon store?

• phytoplankton

• soil and organic matter

• ocean

• atmosphere

What are the sources of usable nitrogen for plants?

• atmospheric nitrogen and nitrogen gas

• nitrate and nitrite ions

• protein and carbohydrates

• ammonium and nitrate ions

Where is nitrogen found in the nitrogen cycle?

• Atmosphere

• Seawater

• Rocks

• Desks

Plants use energy from the sun to convert carbon dioxide gas into oxygen molecules.

• sun, carbon dioxide, oxygen

• water, nitrogen, hydrogen

• moon, oxygen, carbon monoxide

• wind, methane, helium

Which process is where carbon is taken out of the atmosphere?

• Photosynthesis
• animal respiration

• organic carbon

• auto and factory emissions

What process makes nitrogen in the atmosphere usable for living things?

• Nitrogen Fixation

• Photosynthesis

• Decomposition

• Respiration