Cycling of Matter

The following are part of the carbon cycle EXCEPT _________.

• respiration
• precipitation
• decomposition
• photosynthesis

Plants rely heavily on ____ in the nitrogen cycle to incorporate nitrogen into organic compounds

• bacteria
• viruses
• fungi
• oxygen

Plants absorb and store some of the energy in sunlight through a process called …

• Cellular respiration

• Photosynthesis

• Carbon Cycle

• Decomposer

Green plants and algae make their own food through photosynthesis. What is photosynthesis?

• a cell process that uses energy from sunlight to convert water and oxygen into food

• a cell process that uses energy from sunlight to convert water and glucose into food

• a cell process that uses energy from sunlight to convert water and chlorophyll into food

• a cell process that uses energy from sunlight to convert water and carbon dioxide into food

_______________________ converts nitrogen into a form that plants can absorb.

• Denitrifying bacteria

• Nitrogen fixing bacteria

• Decomposers

How do living organisms return carbon to the atmosphere in the carbon cycle?

• respiration and photosynthesis
•  decomposition and respiration

Which component is missing from the chemical equation for photosynthesis?carbon dioxide + water + light energy --> ? + oxygen

• hydrogen

• chlorophyll

• glucose

• light energy

Which of the following does not move through cycles?

• Nitrogen
• Phosphorus
• Carbon
• Sulfur

oxygen is a gas produced by _____ and used by ________

• plants and animals

• photosynthesis and carbon dioxide

• animals and plants

• carbon dioxide and photosynthesis

Plants use ____________ to make their own food

• Water

• Sunlight

• Carbon dioxide

• All of these