Like this study set? Create a free account to save it.

Sign up for an account

Already have a Quizlet account? .

Create an account


a change through time


slow, steady changes which accumulate over LONG periods of time, fossil records supports this

Punctuated Equilibrium

things stay THE SAME for long periods of time, then some CATASTROPHIC EVENT (fire, flood, volcano, hurricane, tsunami) INTERRUPTS the BALANCE causing the change in what settles in the area in the future (may be same species or different species that settles after the event)

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

Voice Recording