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a layer of gases that surrounds a planet
Earth’s atmosphere contains the oxygen people need to breathe.
to protect or keep in an original state
Officials preserve the Declaration of Independence behind a thick sheet of glass.
a person picked to represent other people at a meeting
The United States is one of about 200 countries that have a delegate in the United Nations. The organization works to solve the world’s problems.
to give up something you want in order to reach an agreement
Aiden and Tim both wanted to hold the kite, so they decided to compromise by taking turns.
a group of related animals or plants
The bald eagle is a well-known species of bird.