Match the vocabulary words with their definitions.

1.
atmosphere

2.
chemical energy

3 .
atomic energy

4 .
friction

5 .
liquid

6 .
current

7 .
Dewar flask

8 .
atom

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resistance to motion between two objects in contact

energy of atoms

"thermos" bottle

energy possessed by a substance by virtue of its physical properties

the air around the earth

a flow

a state of matter in which molecules are touching but still free to flow due to weak chemical bonds

the smallest part of an element that has the characteristics of the element