Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards
share
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Vocabulary Review

QuestionAnswer
What is any difference between indivisuals of the same species? Variation
THe process by wich indivisuals are better adapted to their environment and are more likely to survive and reproduce is called Natural Selection
Evidence that related species had a common ancestor because of the way their bodies are automaticlly constructed in similar ways. Homologous structure
This factor in Natural Selection happens when there are more offspring than can possibly survive on the given resources. Overproduction
The time it takes for half of the atoms in a sample to decay it's Half time
A well tested concept that explains a wide range of observations is a Scientific theory
The theory that species evolve quickly during short bursts of time is Punctuated equilib
Documentation of the millions of fossils scientists have collected over time is called the Fossil record
Unstable elements that decay or break down into different elements are Radioactive elements
Similar structures that related species have inherited from common ancestors are called Homologous structures
A hollow space left where the fossil has decayed or dissolved is called a Mold
A process comparing the age of twork fossils by their placement in the layers of sedimentary rock layers is Relative dating
Gradual changes in species over time is called Evolution
Fossils that are buried in sediments and actually to rock are Petrified fossils
A trait that helps an organism survive and reproduce is an Adaptation
The theory that evolution occurs slowly but steadily is Gradualism
A diagram that shows how scientists think different groups of organisms are related is a Branching tree
A process that tests the radioactive materials within a fossil to tell it's actual age is called Radioactive dating
Preserved remains of an organism that lived in the past are Fossils
When no members of the species are still alive is called Extinct
A copy of the shape of the organism that made is called a Cast
This is a factor in natural selection as organisms attempt to survive using the same limited resources Variations
Created by: TruittG