M2 L3 Cycling of matter G6

Plants use ____________ to make their own food

• Water

• Sunlight

• Carbon dioxide

• All of these

Water in any form falls to Earth.

• Condensation

• Sublimation

• Evaporation

• Precipitation

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

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

What is the water cycle?

• Water changes from a liquid to a gas.

• The process through which water moves around the Earth.

• The sun heats the ocean.

What converts nitrogen gas into a usable form for plants and animals?

• bacteria

• rain

• fungi

• car exhaust

Organisms that need nitrogen to survive.

• only plants

• only animals

• only bacteria

• all living things

How is nitrogen "fixed" into a usable form for plants?

• Through action of bacteria only

• Through lightning only

• Through action of bacteria and lightning

• Through photosynthesis

oxygen is a gas produced by _ and used by  _ 

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

What is the process of combining nitrogen gas with other elements to make nitrogen into usable compounds?

• nitrogen composition

• nitrogen fixation

• ammonia

• denitrification

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

• Gas

• Clouds

• Carbon dioxide in the atmosphere

• Nitrogen in the atmosphere