The Water Cycle
Water surrounds 70 percent of the Earth.
True or False
What is True?
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All organisms contain.
What is carbon?
page 718
People who make things or products are called.
What are producers?
page 724
All living things need.
What is oxygen?
page 717
Cycles between the Earth and.
What is atmosphere?
page 715
Water is 97 percent of what type of water on earth.
What are oceans?
page 713
Layers of gases that surrounds Earth.
What is atmosphere?
page 718
producers make their own food from.
What is the environment?
page 724
Two important substances in life.
What is carbon dioxide and water?
page 717
Nitrogen is an important part of.
What is DNA?
page 715
The three processes of the water cycle.
What are condensation, evaporation, and precipitation?
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Carbon dioxide produces energy-rich types of these.
What are sugars?
page 719
A series of chemical reactions that convert light energy, water, and carbon dioxide into food energy, molecules, and glucose, and give off oxygen.
What is photosynthesis?
page 724
Oxygen is released in more than how much percent of the environment.
What is 50 percent?
page 717
The atmosphere is mostly.
What is nitrogen?
page 716
The first step of the water cycle.
What is evaporation?
page 714
Released carbon.
What is a byproduct?
page 719
What is the process by which producers use chemical energy in matter rather than light energy and make food.
page 724
What is chemosynthesis?
The Earth's atmosphere increased or decreased.
What is increased?
page 717
Animals take in other organisms when they.
What is eating other plants and other organisms?
page 716
The process by which water vapor changes into liquid water.
What is condensation?
page 714
Carbon dioxide absorbs what kind of energy.
What is thermal?
page 719
Three examples of photosynthetic bacteria.
What are grass trees and alage?
page 724
Scientists estimate the number of unicellular organisms in water, which are called.
What is phytoplankton?
page 717
The process that changes atmospheric nitrogen into nitrogen compounds that are usable by living things.
What is nitrogen fixation?
716