Cycles in Nature (Water, Carbon, Nitrogen, Succession)

Carbon molecules cannot be created or destroyed

• True

• False

• Not enough information to answer

In the nitrogen cycle, what does label A in the diagram represent?

• Gas

• Clouds

• Carbon dioxide in the atmosphere

• Nitrogen in the atmosphere

Organisms that do not decompose can be buried and become what?

• water
• nutrients
• air
• fossil fuels

Organisms that need nitrogen to survive.

• only plants

• only animals

• only bacteria

• all living things

What % of the air is made of nitrogen?

• 21%

• 52%

• 61%

• 78%

What is the role of decomposing bacteria in the nitrogen cycle?

• change Nitrogen gas into Nitrate

• Return the nitrogen compounds to the soil

• Turn nitrogen into water

• Turn nitrate into nitrogen gas

oxygen is a gas produced by _ and used by  _ 

• plants and animals 
• photosynthesis and carbon dioxide 
• animals and plants 
• carbon dioxide and photosynthesis

carbon dioxide is a gas produced  by ________ and used by __________

• plants and animals 
• carbon and photosynthesis
• animals and plants 
• photosynthesis

What are examples of pioneer species in a primary succession?

• Bushes and Shrubs
• Oak trees
• Mossess and Lichens 
• A rose Bush

Which example is a form of precipitation?

• Dew

• Fog

• Frost

• Hail