1.
The smallest unit of matter.(A, 4 letters)
2.
A group of atoms bonded together.(M, 8 letters)
3.
A pure substance made of only one type of atom.(E, 7 letters)
4.
A substance made from two or more elements chemically combined. (C, 8 letters)
5.
A combination of substances that are not chemically bonded. (M, 7 letters)
6.
The ability to do work or cause change. (E, 6 letters)
7.
A push or pull acting on an object. (F, 5 letters)
8.
A force that opposes motion between two surfaces. (F, 8 letters)
9.
The force that attracts objects toward the Earth. (G, 7 letters)
10.
An object or material that produces a magnetic field. (M, 6 letters)
11.
A complete path through which electric current can flow. (C, 7 letters)
12.
The difference in electric potential energy per charge between two points. (V, 7 letters)
13.
The flow of electric charge. (C, 7 letters)
14.
A single unit of a battery that stores and releases energy. (C, 4 letters)
15.
The process by which plants make their own food using sunlight. (P, 14 letters)
16.
The process cells use to break down food and release energy. (R, 11 letters)
17.
A living thing. (O, 8 letters)
18.
A community of organisms and their physical environment. (E, 9 letters)
19.
A process in which substances are changed into new substances. (R, 8 letters)
20.
A very tiny part of matter; can be an atom or a molecule. (P, 8 letters)