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Earth information
information on the history of the earth
10
Science
7th Grade
02/29/2012

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Cards

Term
How old is the solar system?
Definition
about 5 billion years ago, not hundreds, not thousands, not even millions. 5 billion
Term
was earth ever very hostile?
Definition
yes,it was hostile. it was bombarded with asteroids and had lethal gasses and erupting volcanoes
Term
what form was the water a very long time ago (when the earth was made)
Definition
It was only in the form of vapor or gas
Term
What is an "Atmosphere?"
Definition
It is what gasses and clouds are kept in by.
Term
What is "Nuclear Fusion?"
Definition
it is binding of atoms to create (massive) amounts of energy
Term
What is "water vapor?"
Definition
it is water the is in it's gas form.
Term
What is "adaptation?"
Definition
Where/when something has a characteristic that allows them to survive.
Term
What is "Variation?"
Definition
It is where/when something is different
EX: One dog gives birth to three dogs. all but one are very furry
Term
Adaptqations develop from variations within a population and help organisims survice in their given enviroment
Definition
-Phanerzoic Eon-540 mya to present. many new & comlex life forms appear.
-Earth is biologically diverse (both plants and animals)
-Each organisim has the ability to survive in a specific enviroment. They must be able to get food and avoid being eaten.
-Every organisim is different from every other manly due to genes.
Term
Random change in an organisim's gene's/ Naturally occurring; some may be harmful, others neutral and others are beneficial.
Definition
if beneficial, the organisim may have a better chance to survive and have offspring, pass tje mutation to the offspring, thereby increasing the chances of the offspring to survive.
Results in biological diversity.
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