Heat & Matter - Topic 1

Question 1

What is an example of a solid?

Answer 1

Shell, sponge, glass, wood and steel

Question 2

What is an example of a liquid?

Answer 2

Orange juice, shampoo, oil, milkshake, and water

Question 3

What is an example of a gas?

Answer 3

Air, steam from a kettle, carbon dioxide, methane, and oxygen

Question 4

Describe the arrangement of particles in a solid

Answer 4

Vibrates but stays in a fixed position, Particles are also close together in arrangement

Question 5

Describe the arrangement of particles in a liquid

Answer 5

They move around each other, their particles are close together but dispersed randomly

Question 6

Describe the arrangement of particles in a gas

Answer 6

They move far apart so much that they hit off each other, they move quickly in all directions, the particles are far apart and randomly arranged

Question 7

Describe the properties of a solid

Answer 7

A solid will hold its shape unless a force is put upon it

Question 8

Describe the properties of a liquid

Answer 8

Its shape can be changed but the volume stays the same and takes the shape of whatever contains it

Question 9

Describe the properties of a gas

Answer 9

Gas particles spread out to fill the container or room it is in

Question 10

What happens if you add heat to an object?

Answer 10

Its temperature will increase

Question 11

What happens if you remove heat from an object?

Answer 11

Its temperature will decrease

Question 12

Why do metals expand when heated?

Answer 12

When heated the particles move around and therefore makes it expand

Question 13

Why do metals contract when cooled?

Answer 13

Because as the temperature goes down the particles move less causing it to shrink

Question 14

What direction does heat flow in a solid?

Answer 14

Heat flows from the warm end to cooler end

Question 15

What is conduction?

Answer 15

Conduction is the transport of heat in solids

Question 16

What is convection?

Answer 16

Convention is when liquids and gasses are heated

Question 17

How does heat transfer in liquids and solids?

Answer 17

The warm rises and the cold sinks to the bottom

Question 18

What way does heat travel for it to be called radiation?

Answer 18

Heat travels by radiation when heat energy is given out by hot objects in the form of electromagnetic waves through the air

Question 19

What does heat radiation travel by?

Answer 19

Invisible infrared waves

Question 20

What colours absorb more heat?

Answer 20

Darker colours absorb more heat than lighter colours

Question 21

What is melting?

Answer 21

Melting is when the particles in a solid gain energy from heating. The particles become more randomly arranged and therefore turn to liquids

Question 22

What is freezing?

Answer 22

Freezing is when the particles in a liquid slow down and fix turning into a solid

Question 23

What is the melting point/freezing point of a substance?

Answer 23

When a substance turns from a solid to a liquid

Question 24

What is the melting point/freezing point of water?

Answer 24

0 degrees Celsius

Question 25

What is evaporation?

Answer 25

Evaporation is when the particles in a liquid gain energy from heating. The particles become even more randomly arranged and disordered turning to a gas

Question 26

What is the boiling point of a substance?

Answer 26

The temperature at which the substance turns from a liquid to a gas

Question 27

What is the boiling point of water?

Answer 27

100 degrees Celsius

Question 28

What is condensation?

Answer 28

Condensation is when the particles in a gas lose heat energy to the surroundings and the particles move closer together and become more ordered turning to a liquid