Review
The heat of the sun changes water on Earth's surface into water vapor. This process is called....
Evaporation
Earth's water moves through the environment in what is called....
The Water Cycle
Plants and animals put back water into the environment through the process of...
Transpiration
The process of ______ is when water vapor changes back into a liquid
Condensation
Any form of water that falls from clouds is called...
Precipitation
What are the two forms of fixed nitrogen?
Nitrates and Ammonia
Does evaporation happen before or after condensation?
Before
What is the energy source for the water cycle?
When water _______, dew forms.
Condenses
What are the four ways that precipitation happens?
Snow, hail, sleet, and rain.
What does it mean to be fixed?
to change into something else
Cold air causes water vapor to _______ and form _______
condense and form clouds
Plants release _____ into the atmosphere as a byproduct of photosynthesis.
Oxygen
In the water cycle on Earth, water is in which form?
Solid, Liquid, and Gas
Animals release _______ as a product of respiration
Carbon Dioxide
The Earth's atmosphere is made of ______% of nitrogen gas
78%
In what process do bacteria and fungi break down dead organisms tissues and use some of the carbon as food?
Decay
What are three ways to help keep the carbon-oxygen cycle in balance?
Plant a tree or garden, walk or ride a bicycle instead of driving, carpool, don't burn leaves, use a manual lawn mower, wear a sweater when its cold inside your house
Ammonia is a usable form of _______ that bacteria use in the __________________
Nitrogen ; nitrogen cycle
What converts some atmospheric nitrogen into nitrates that organisms can use?
Lightning
What would happen in the air in the upper atmosphere were warmer than water vapor in the air?
If the air were warm, condensation couldn't occur and then there would be no precipitation
Do rain puddles disappear more quickly on a cloudy day or on a clear day?
More quickly on a clear day because the heat from the sun helps the water evaporate.
If plants and animals lived forever, what would happen to the nitrates in Earth's soil?
Nothing would die; therefore nothing would decay; so fewer nitrates would be returned to the soil. The nitrates in the soil would be used up.