Practice questions Chemistry

Question 1

Write the name of the state of matter that has: particles that are spread out the most?

Answer 1

Gas

Question 2

Write the name of the state of matter that has: Particles that are NOT free to move.

Answer 2

Solid

Question 3

Write the name of the state of matter that has: Particles that move through the whole of their container.

Answer 3

Gas

Question 4

Fill in the sentences:
The change of a substance from a liquid to a solid is called ______

Answer 4

Freezing

Question 5

Fill in the sentences:
The change of a substance from a liquid to a gas is called ______

Answer 5

Evaporation

Question 6

Fill in the sentences:
The change of a substance from a solid to a liquid is called ______

Answer 6

Melting

Question 7

Fill in the sentences:
When a solid melts, the surroundings transfer energy to the solid so it’s particles vibrate _____

Answer 7

Faster

Question 8

Fill in the sentences:
When a liquid freezes, it’s particles move more ______ as they transfer energy to the surroundings.

Answer 8

Slowly

Question 9

Fill in the sentences:
In liquids and gases, particles spread out through the process of ______.

Answer 9

Diffusion

Question 10

What does a thermometer measure?

Answer 10

Measures the temperature of the air.

Question 11

What does a stop watch measure?

Answer 11

Measures the time for the experiment.

Question 12

What do weighing scales measure?

Answer 12

Measure the mass of something.

Question 13

What does a ruler measure?

Answer 13

Measures the length of a plant.

Question 14

In what unit would a stop clock measure?

Answer 14

Seconds, minutes or days.

Question 15

In what unit would a thermometer measure?

Answer 15

Degrees Celsius or Fahrenheit.

Question 16

In what unit would a ruler measure?

Answer 16

Mm or cm

Question 17

In what unit would a weighing scale measure?

Answer 17

Grams (g)

Question 18

What is gallium’s melting point?

Answer 18

30 degrees C

Question 19

What is gold’s melting point?

Answer 19

1063 degrees C

Question 20

What is oxygen’s melting point?

Answer 20

-218 degrees C

Question 21

What is water’s melting point?

Answer 21

0 degrees C

Question 22

Name the state of matter that diffusion happens the fastest in.

Answer 22

Gas

Question 23

Describe what happens during the process of dissolving. 2 marks

Answer 23

The particles can move freely therefore the particles of the solute diffuse and make a solution with the solvent.

Question 24

Suggest what happens to the rate of dissolving at low temperatures. 1 mark

Answer 24

It will happen slower because there will be less energy in the particles.