Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

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.
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
remaining cards
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:
restart all cards
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

7th gr science ch 6

ch 6 the environment and change over time

fossil record made up of all the fossils ever discovered on Earth
mold the impression of an organism in a rock
cast a fossil copy of an organism in a rock.
trace fossil the preserved evidence of the activity of an organism
geologic scale the chart that divides Earth's historyinto different time units
biological evolution the change over time in populations of related oranisms
extinctions occurs when the last individual organisms of a species dies
naturalist a person who studies plants and animals by observing them
variation a slight difference in an inherited trait of individual members of a species
natural selection the process by which populations of organisms with variations that help them survive in their environments live longer, compete better and reproduce more than those that do not have the variation
adaptation an inherited trait that increases an organism's chance of surviving and reproducing in its environment
camouflage an adaptation that enables a species to blend in with its environment
mimicry the resemblance of one species to another
selective breeding the breeding of organisms for desired characteristics
comparative anatomy the study of similarities and differences among structures of living species
homologous structures body parts of organisms that are similar in structure and position but different in function
analogous structures body parts that perform a similar function but differ in structure
vestigial structure body parts that have lost their original function through evolution
embryology the science of the development of embryos from fertilization to birth
Created by: HOMSSeminar