Science: Chapter 5

Question 1

Substances are made up of particles.

Accepted Answer

o

Question 2

Particles in a solid are constantly moving.

Accepted Answer

x

Question 3

The particle model helps us explain why solids and liquids have different properties.

Accepted Answer

o

Question 4

Flour can be poured like a liquid because its particles are not closely packed together.

Accepted Answer

x

Question 5

New substances are formed during melting and freezing.

Accepted Answer

x

Question 6

A chemical reaction take place when substances react to form one or more new substances.

Accepted Answer

o

Question 7

Look at the diagram of the particle model below! This the particle model of a ....

Accepted Answer

solid

Accepted Answer

solids

Question 8

Look at the diagram of the particle model below! This the particle model of a ....

Accepted Answer

liquid

Accepted Answer

liquids

Question 9

Which of these explains why liquids can change in shape?

Accepted Answer

0

Question 10

Emma leaves a piece of chocolate under the hot Sun. The chocolate is ....

Accepted Answer

0

Question 11

Emma leaves a piece of chocolate under the hot Sun. The result is shown by the picture below. The chocolate changes from a solid into a ....

Accepted Answer

0

Question 12

Look at the picture! The change of the chocolate is called a .... reaction.

Accepted Answer

0

Question 13

Burning a matchstick is a physical reaction.

Accepted Answer

x

Question 14

Melting butter is a physical reaction.

Accepted Answer

o

Question 15

Baking bread is a chemical reaction.

Accepted Answer

o

Question 16

Mixing salt and water is a physical reaction.

Accepted Answer

o