Save
Upgrade to remove ads
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


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. Your email address is only used to allow you to reset your password. See 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.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
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

mr f chapter 7

vocabulary words

TermDefinition
adaptation a characteristic that helps an organism survive in its environment or reproduce
extinct a species that does not have any living members.
homologous structure body parts that are structurally similar in related species ; provide evidence that the structures were inherited from a common ancestor
branching tree a diagram that shows how scientists think different groups of organisms are related
fossil the reserved remains of organisms that lived in the past
sedimentary rock type of rock that forms when particles from other rocks or the remains of plants and animals are pressed and cemented together
petrified fossil a fossil in which minerals replace all or part of an organism
mold a fossil formed when an organism buried in sediment dissolves leaving a hollow area
cast a fossil that is a copy of an organisms shape formed when minerals seep into a mold
relative dating a technique used to determine which of two fossils are older
absolute dating a technique based to determine the actual age of a fossil
radioactive element an unstable particle that breaks down into an element
half life the time it takes to for half of the atoms in a radioactive to decay
fossil record the millions of fossils scientists have collected
gradualism the theory that evolution happens slowly but steadily
punctuated equilibria the theory that species evolve during during rapid short periods of time
species a group of similar organisms whose members who can mate with one another and produce fertile offspring
evolution the gradual change in a species over time
scientific theory a well tested concept that explains a wide range of observation
natural selection the process by which individuals that are better adapted to their enviorment are more likely to survive and reproduce then other members of the same species
variation any diffrence between individuals of the same species
Created by: alr
Popular Biology sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards