Biogeochemical cycles Test review

ATP is...

• a unit of energy in the cell
• a type of lipid
• a molecule of DNA

A plant is an example of an autotroph because ...

• they make their own food
• they eat other organisms for food

Which biomolecules contain nitrogen in their chemical structure?

• 
• 
• 
• 

Match the following description to the name of the process.

• evaporation of water in plants

• precipitation

• clouds

• condensation

• water vapor

• transpiration

• rain, snow, sleet

• evaporation

What events release carbon dioxide in the air?

Check all that apply.

• respiration of humans and animals

• decomposition of organisms

• burning of fossil fuels

• deforestation

Match the following description to the event.

• a phenomenon that increases ocean water acidity by lowering its pH due to high levels of CO₂

• ocean acidfication

• a natural phenomenon where greenhouses gases, like CO₂, traps sunlight and wams the planet

• pollution

• a contamination of air dues to introduction of pollutants/chemicals

• global warming

• a phenomenon showing a gradual increase of Earth's temperature due to unnaturally high levels of CO₂

• greenhouse

​ ​ ​ ​ The substances​ (a)   , a sugar/carbohydrate and (b)   gas is produced when plants, algae, and cyanobacteria photosynthesize.​

• glucose
• oxygen
• carbon dioxide
• water

What do you call organisms that undergo photosynthesis?

• producers/

  autotrophs

• consumers/

  heterotrophs

Plants use _____________ to make their own food during photosynthesis.

• water
• energy from the Sun
• CO2
• water, energy from Sun, CO2

What produces oxygen?

• People and animals

• All plants

• Only green plants

• All living organisms