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.

Remove ads
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

science 2

TermDefinition
Geologic time scale a record of the major events and diversity of life forms in Earth's history
Precambrian Era The first Era in earths. Began with the creation of the Earth 4.6billion years ago. simple life forms, oceans form. no hard skeletons (jellyfish and sea-worms)
Paleozoic Era Early land plants and invertebrates; then fish, arachnids. insects, and ferns. Later amphibians, and reptiles. mass extinction of the marine invertebrates at the end of the Era
Mesozoic Era Retiles are the dominant animal, including dinosaurs. Small mammals and flowering plants appear at the end of the era. Mass extinction of dinosaurs at the end of the era
Cenozoic Era Mammals are the dominant species Diversity of life increases. Flowering plants are most common. Modern humans appear near the end of the era
Mass extinction a widespread and rapid decrease in the biodiversity on earth. an event identified as a sharp sharp in the Diversity and abundance of multicellular organisms
Created by: Neolowery