Terms
90 new/unreviewed 90 total
Term
Atom
Definition
A basic unit of matter that cannot be broken down by normal chemical reactions.
New/Unreviewed
Term
Biology
Definition
The study of life.
New/Unreviewed
Term
Biosphere
Definition
A collection of all ecosystems on Earth.
New/Unreviewed
Practice Tests
0 total
(None) Completed practice tests will show up here