Water Cycle
What are the the three main processes used in the water cycle?
Evaporation, Condensation, Precipitation
What do living things use nitrogen for?
To make proteins.
Why do all living things need oxygen?
What is one way that carbon from living things return to the environment?
When living things die, they decompose and the carbon is returned to the environment
What is evaporation?
liquid water changes to a gas called water vapor
How is nitrogen returned to the soil?
Through the decay of organic material and wastes.
How is oxygen a part of other cycles?
It is a part of the carbon cycle because carbon and oxygen combine to create CO2
What role does photosynthesis play in the carbon cycle?
Plants take in the CO2 to carry out photosynthesis where the CO2 is incorporated into food molecules
What is condensation?
water vapor changes to liquid water
How is lightning apart of the Nitrogen cycle?
It changes Nitrogen gas in the atmosphere to nitrogen compounds, these compounds fall to the ground and then are found in the soil.
How are humans involved in the oxygen cycle?
Humans take in O2 when they breathe in and they breathe out CO2 into the atmosphere
What processes release carbon into the atmosphere?
Cellular respiration, decomposition, and combustion
What is precipitation?
When water that falls from the clouds hits Earth's surface
What is Nitrogen Fixation?
Nitrogen is converted to a form that can be used by living things.
Did Earth's early atmosphere contain oxygen gas? why?
Probably not because our planet had to evolve to have bacteria that could carry out photosynthesis.
What is it called when we have too much carbon dioxide in the air causing the temperatures to rise?
Global warming
What are other ways that water vapor enters the atmosphere?
Through transpiration
How do farmers help aid the nitrogen cycle?
They use animal waste to provide nitrogen to plants for better growth.
Draw a diagram of the oxygen cycle. Include oxygen, dioxide, and photosynthesis.
Answers will vary.
- plants, protists, and bacteria in the water
- decomposition
- Sediments