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

Sign up for an account

Already have a Quizlet account? .

Create an account


the process through which a species disappears from Earth

mass extinction

this occurs when large numbers of species die out in a fairly short period of time.


a process of change over time

natural selection

theory by Charles Darwin that explains how populations evolve into new species


a trait that improves an organism's chance for survival and reproduction

continental drift

idea suggested by Alfred Wegener that states that a giant landmass known as Pangaea gradually split apart and the continents moved to their present location.

theory of plate tectonics

states that the Earth's lithosphere (land), is broken into large sections called tectonic plates that move and change position over time.


this word means land

tectonic plates

land that is broken into large sections


a dense molten layer of Earth that tectonic plates float on

convergent boundary

when tectonic push together causing the land to rise

divergent boundary

when tectonic plates are pulled apart. These ocean plates create new seafloor and undersea mountains called mid-ocean ridges. These boundaries on land can produce volcanoes.

transform boundary

when tectonic plates slide past each other. These boundaries cause earthquakes.

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