Science unit test

Question 1

Matter can be broken down into?

Answer 1

Pure substances

Question 2

Pure substances can be broken down into?

Answer 2

Elements and compounds

Question 3

Elements and compounds are composed of?

Answer 3

Atoms

Question 4

Atoms can be broken down into?

Answer 4

Protons, neutrons, and electrons

Question 5

Liquid to gas?

Answer 5

Evaporation

Question 6

gas to liquid?

Answer 6

Condonsation

Question 7

solid to gas

Answer 7

sublimation

Question 8

gas to solid

Answer 8

Deposition

Question 9

solid to liquid

Answer 9

melting

Question 10

liquid to solid

Answer 10

Freezing

Question 11

what is matter?

Answer 11

Anything that takes up space

Question 12

What is a physical change?

Answer 12

A reversible change that only changes somethings physical form.

Question 13

The three subatomic particles in an atom?

Answer 13

protons, neutrons and electrons

Question 14

what is the atomic number?

Answer 14

the amount of protons and electrons in an atom

Question 15

Three states of mater?

Answer 15

Solid, liquid, gas

Question 16

four main statements of the kinetic molecular theory?

Answer 16

1. always moving
2. have a small volume
3. have intermolecular forces
4. experience elastic colitions

Question 17

where is each particle located in the atom?

Answer 17

Electrons = orbitals
Protons = nucleus
Neutrons = nucleus

Question 18

what is a compound?

Answer 18

something composed of two or more separate elements

Question 19

what’s the difference between a physical change and a chemical change?

Answer 19

A physical change is reversible

A chemical change isn’t

Question 20

How is the periodic table organized?

Answer 20

Atomic weight and electrons