Advertisement Upgrade to remove ads

Ch.2 sec1


adapt (a wild plant or unclaimed land) to the environment


someone who hunts animals and gathers food in the wild to survive.


a society with cities, a central government, job specialization, and social classes


to move from one place to another

ethnic group

Group of people who share common ancestry, language, religion, customs, or combination of such characteristics

Flickr Creative Commons Images

Some images used in this set are licensed under the Creative Commons through Click to see the original works with their full license.

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 above 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

NEW! Voice Recording