L6 | MATTER | States of matter

Question 1

What are the three states of matter?

Answer 1

• Solids
• Liquids
• Gas

Question 2

What is it called when a solid turns into a liquid?

Answer 2

Melting.

Question 3

Liquid to solid?

Answer 3

Freezing.

Question 4

Solid to gas?

Answer 4

Sublimation.

Question 5

Gas to solid?

Answer 5

Deposition.

Question 6

Liquid to gas?

Answer 6

Evaporation.

Question 7

Gass to a liquid?

Answer 7

Condensation.

Question 8

Brownian motion?

Answer 8

Random movement of microscopic particles in suspension in a liquid or gas.

The diffusion of many particles.

Question 9

What is Brownian motion caused by?

Answer 9

Collisions between dirt particles and the molecules of the liquid or gas.

Question 10

What is DIFFUSION?

Answer 10

The movement of particles from a high concentration to a low concentration.

Question 11

What is diffusion caused by?

Answer 11

The constant thermal motion of particles.

Question 12

During a change of state, what happens to the physical properties?

Answer 12

They change.

Question 13

What happens to the chemical composition during a change of state?

Answer 13

Remains the same.

Question 13

What is the Law of conservation of mass?

Answer 13

The total mass of the particles before the state change and after the state change remains constant.

Question 14

Melting point?

Answer 14

The temperature at which a solid changes its phase or state to become a liquid. The process is called melting.

Question 15

Freezing point?

Answer 15

The temperature at which a liquid changes its phase to become a solid. The process is called freezing.

Question 15

Boiling point?

Answer 15

The temperature at which a liquid changes its phase to become a gas. The process is called evaporation.

Question 16

Evaporation?

Answer 16

Evaporation from a liquid’s surface can happen at a wide range of temperatures. If more energy is added then bubbles of gas appear inside the liquid and this is known as boiling.

Question 17

What is the heating curve of a substance?

Answer 17

Shows the changes in temperature as we move from a solid to a liquid to a gas.

Question 18

What is the cooling curve of a substance?

Answer 18

Shows the changes in temperature as we move from gas to liquid to solid.

Question 19

At what temperature is between the melting and boiling point of water?

Answer 19

96 degrees Celsius.

Question 20

At what temp does water freeze?

Answer 20

-2 degrees Celsius.

Question 21

What happens at 101 degrees Celsius?

Answer 21

It turns into a gaseous state.