Properties of Matter

Question 1

Which quantity is represented by the symbol F?

Answer 1

F = force

Question 2

What does the prefix G stand for?

Answer 2

G stands for giga

giga = x 10⁹

Question 3

Describe how to convert a temperature in degrees celsius into kelvin.

Answer 3

To convert a temperature from degrees celsius into kelvin, add 273.

Question 4

What does the prefix µ stand for?

Answer 4

µ stands for micro

micro = x 10^-6

Question 5

What unit is pressure measured in?

Answer 5

Pressure is measured in pascals (Pa).

Question 6

Round off this number to 3 significant figures.

3.14159

Answer 6

3.14159 rounded off to 3 significant figures is

3.14

Question 7

What is the definition of the term pressure?

Answer 7

Pressure is defined as the force per unit area.

Question 8

Round off this number to 3 significant figures.

6.22789

Answer 8

6.22789 rounded off to 3 significant figures is

6.23

Question 9

Which quantity is represented by the symbol c?

Answer 9

c = specific heat capacity

Question 10

Round off this number to 3 significant figures.

1,526.33

Answer 10

1,526.33 rounded off to 3 significant figures is

1,530

(the ‘2’ has been rounded up to 3)

Question 11

What does the prefix n stand for?

Answer 11

n stands for nano

nano = x 10^-9

Question 12

Round off this number to 3 significant figures.

0.0025668

Answer 12

0.0025668 rounded off to 3 significant figures is

0.00257

Question 13

What unit is volume measured in?

Answer 13

Volume is measured in metres cubed (m³).

Question 14

Which quantity is represented by the symbol E_h?

Answer 14

E_h = heat energy

Question 15

Explain how a snowshoe works

(in terms of pressure, force and area).

Answer 15

A snowshow spreads a force over a larger area - this causes the pressure on the snow to decrease.

Question 16

How many pencils are there?

Answer 16

Question 17

Which quantity is represented by the symbol m?

Answer 17

m = mass

Question 18

What unit is energy measured in?

Answer 18

Energy is measured in joules (J).

Question 19

What does the prefix k stand for?

Answer 19

k stands for kilo

kilo = x 10³

Question 20

What unit is temperature measured in?

Answer 20

Temperature is measured in degrees celsius (°C).

Temperature can also be measured in kelvin (K).

Question 21

What does the prefix M stand for?

Answer 21

M stands for mega

mega = x 10⁶

Question 22

Explain, in terms of particles, what happens to the pressure of a gas when its temperature is increased?

Answer 22

When the temperature of a gas is increased, the pressure increases.

• The particles gain energy
• The particles move faster
• The particles collide with the container walls more often and with greater force

Question 23

What does the prefix m stand for?

Answer 23

m stands for milli

milli = x 10^-3

Question 24

A substance is heated up in a science experiment. The substance is a solid to begin with.

In the graph of temperature versus time, what is happening in the section labelled D?

Answer 24

The substance is changing state from liquid to gas.

(the substance is boiling)

Question 25

Name the three quantities shown in this formula.

Answer 25

E_h = energy m = mass l = latent heat

Question 27

A substance is heated up in a science experiment. The substance is a **solid** to begin with. In the graph of temperature versus time, what is happening in the section labelled **B**?

Answer 27

The substance is **changing state** from **solid** to **liquid**. (the substance is melting)

Question 28

A substance is heated up in a science experiment. The substance is a solid to begin with. What is the **boiling point** of the substance (**temperature** where it **changes** from **liquid to gas**)?

Answer 28

The **boiling point** of the substance is **130 ºC**.

Question 29

A substance is heated in a science experiment. The substance is a **solid** to begin with. In the graph of temperature versus time, what is happening in the section labelled **E**?

Answer 29

At point **E**, the substance is a **gas**. It is heating up (its temperature is increasing).

Question 30

A substance is heated up in a science experiment. The substance is a solid to begin with. What is the **melting point** of the substance (**temperature** where it **changes** from **solid to liquid**)?

Answer 30

The **melting point** of the substance is **60 ºC**.

Question 31

A substance is heated in a science experiment. The substance is a **solid** to begin with. In the graph of temperature versus time, what is happening in the section labelled **C**?

Answer 31

At point **C**, the substance is a **liquid**. It is heating up (its temperature is increasing).