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atmosphere


a layer of gases that surrounds a planet

Earth’s atmosphere contains the oxygen people need to breathe.

atmosphere

preserve


to protect or keep in an original state

Officials preserve the Declaration of Independence behind a thick sheet of glass.

preserve

delegate


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.

delegate

compromise


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.

compromise

species


a group of related animals or plants

The bald eagle is a well-known species of bird.

species
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