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Science Sec. 1, 2, & 3 study guide
study guide
18
Science
7th Grade
03/15/2012

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Cards

Term
photosynthesis is part of the continuous movement
Definition
carbon cycle
Term
gas removed from the air during photosynthesis
Definition
carbon dioxide
Term
element that helps plants grow
Definition
nitrogen
Term
process that changes nitrogen gas into compound plants can use
Definition
nitrogen fixation
Term
process of water changing from a fas to a liquid
Definition
condensation
Term
transfer of nitrogen from air, to soil, to organism , and back to tthe air or soil
Definition
nitrogen cycle
Term
process of water changing from liquid into a gas
Definition
evaporation
Term
continuous movement of water from Earth's surface to the air, and back to Earth's surface
Definition
water cycle
Term
Ehat are the three primary steps of the water cycle?
Definition
evaporation, condensation, and precipitation
Term
Explain the importance of nitrogen to living things
Definition
It is a necessary ingredient of proteins
Term
the priduction of energy rich food molecules from chemicals
Definition
chemosynthesis
Term
a diagram that shows all the possible feeding relationships in a community
Definition
food web
Term
what a food chain begins with
Definition
producers
Term
makes up the second and higher steps in a food chain
Definition
consumers
Term
a diagram that shows the comparative amount of energy at each feeding level
Definition
energy pyramid
Term
What do all the first step organsims have in common?
Definition
producers
Term
What do the second step organisms have in common?
Definition
herbivores
Term
Explain why an energy pyramid is in the shape of a pyramid?
Definition
because it shows that each feeding level has less energy that the one below it
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