wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Unit 2 Review

Total questions: 25

Worksheet time: 15mins

Name
Class
Date
1.

The __________________ properties of a substance can be observed or measured without chemically changing the substance.

a)

Chemical

b)

Physical

2.

Anything that has mass and takes up space is called _________________________.

a)

Mass

b)

Volume

c)

Matter

d)

Molecules

3.

Which subatomic parts of an atom move around the outside of the nucleus?

a)

Protons

b)

Neutrons

c)

Electrons

4.

Rust forming on a car left outside is an example of a _____________________________ change.

a)

Physical

b)

Chemical

5.
a)

Element

b)

Molecule

c)

Compound

d)

Both- Molecule & Compound

6.

The following are signs that a ______________ reaction has occurred: gas is produced, a color change occurs, or if heat or light are produced.

a)

Physical

b)

Chemical

7.

The state of matter in which the particles spread apart, fill ALL the space available to them, and have high thermal energy is the _____________________________ state.

a)

Solid

b)

Liquid

c)

Gas

8.

Luster, odor, electrical conductivity, and melting point are all examples of a ______________________ property.

a)

Physical

b)

Chemical

9.

Atoms are made of what subatomic particles? Check all that apply.

a)

Protons

b)

Neutrons

c)

Positive

d)

Electrons

10.

Pure substances that CANNOT be broken down chemically or physically into other substances are called ______________________________.

a)

Elements

b)

Compounds

c)

Molecules

11.

The state of matter in which particles are the most tightly packed together and vibrate in place is called a ________________ state.

a)

Solid

b)

Liquid

c)

Gas

12.

NaCl and H₂O₂ are examples of _____________.

a)

elements

b)

pure substances

c)

chemical formulas

13.

a)

Element

b)

Molecule

c)

Compound

d)

Both- Molecule & Compound

14.

Fiberglass and Kevlar are examples of

a)

natural materials

b)

synthetic materials

15.

Which two subatomic particles combine to make up the atomic mass of an element on the periodic table?

a)

Protons

b)

Neutrons

c)

Electrons

16.

In an atom, the number of protons equals the number of ________________________.

a)

electrons

b)

mass

c)

atomic weight

d)

atomic number

17.

A property of matter that can only be observed when one substance changes into another substance is a ___________________ property.

a)

physical

b)

chemical

18.

a)

Element

b)

Molecule

c)

Compound

d)

Both- Molecule & Compound

19.

Cotton, wool, and silk are examples of what kind of materials?

a)

Natural

b)

Synthetic

20.

When atoms chemically bond together, a new substance is created. The properties of the new substance are the same as the original atoms.

a)

True

b)

False

21.

a)

Element

b)

Molecule

c)

Compound

d)

Both- Molecule & Compound

22.

Checkmark all the signs that a chemical reaction has occurred in an experiment.

a)

bubbles form

b)

liquid changes to a solid

c)

gas is produced

d)

heat is produced

e)

substances dissolves

23.

a)

Element

b)

Molecule

c)

Compound

d)

Both- Molecule & Compound

24.

How many protons are in Carbon?

a)

6

b)

12

c)

18

25.

How many neutrons are there in Gold?

a)

79

b)

118

c)

197

d)

276