# 11. P6 Molecules and Matter Flashcards Preview

## SHHS - Science - Physics GCSE 2018on > 11. P6 Molecules and Matter > Flashcards

Flashcards in 11. P6 Molecules and Matter Deck (40)
1
Q

﻿Explain why object such as ice and wood float when placed in water.

A

Ice and wood are less dense than water.

2
Q

What is the definition of the “density” of an object?

A

It is the mass per unit volume of an object.

3
Q

The state of matter where the particles are linked by strong forces. They are packed closely together and move very little. The particles usually form a regular and specific pattern.

A

Solid

4
Q

The state of matter where the particles have weaker bonds. They are still tightly packed but may move around each other.

A

Liquid

5
Q

The state of matter where particles are far apart and are in constant random motion. There is no interactive between the particles.

A

Gas

6
Q

The temperature at which a solid turns into a liquid .

A

Melting Point

7
Q

The temperature at which a liquid turns into a gas.

A

Boiling Point

8
Q

Nome of process when a solid changes to a liquid.

A

Melting

9
Q

Name of process when a liquid changes a gas at the boiling point

A

Boiling

10
Q

Name of process when a liquid changes to a gas below the boiling point.

A

Evaporating

11
Q

Name of process when a gas changes to a liquid.

A

Condensing

12
Q

The name given to the sum of the energy of the particles of a substance due to their individual motions and positions.

A

Internal Energy

13
Q

Property of a substance which is the amount of energy required to raise the temperature of one kilogram of a substance by one degree Celsius.

A

Specific Heat Capacity

14
Q

Often represented by the symbol ‘c’.

A

Specific Heat Capacity

15
Q

Units of specific heat capacity.

A

J/kg°C.

16
Q

The amount of energy required to change the state of one kilogram of the substance with no change in temperature.

A

Specific Latent Heat

17
Q

Often represented by ‘L’.

A

Specific Latent Heat

18
Q

Units of specific latent heat.

A

J/kgC

19
Q

When molecules collide with the wall of their container they exert a force on the wall. The total force exerted by all of the molecules inside the container on a unit of area of the wall is called?

A

Gas pressure

20
Q

What is the amount of space that a substance or object occupies?

A

Volume

21
Q

What is the unit of volume?

A

Metres cubed (m³)

22
Q

What is the mass per unit volume of a material?

A

Density

23
Q

What is the standard unit of density?

A

kg/m³

24
Q

When a solid changes into a gas when it is heated without becoming a liquid first.

A

Sublimation

25
Q

The amount of energy required to change one kilogram of a solid into a liquid with no change of temperature.

A

Specific Latent Heat Of Fusion

26
Q

The amount of energy required to change one kilogram of a liquid into a gas (vapour) with no change of temperature.

A

Specific Latent Heat Of Vaporisation

27
Q

What is meant by the random motion of a gas molecule?

A

Particles moving with a range of different speeds in random directions.

28
Q

What observations made which provided evidence for the random motion of a gas molecule?

A

Brownian motion of smoke particles.

29
Q

Explain how the haphazard and unpredictable motion of smoke particles under a microscope were explained?

A

Air molecules moving randomly collided with the smoke particles. Providing them with random forces, causing the unpredictable motion.

30
Q

The unit of pressure.

A

Pascals (Pa)

31
Q

Equation linking energy transferred and the specific heat capacity?

A

E = m x c x ?

32
Q

Equation linking energy transferred and the specific latent heat?

A

E = m x L

33
Q

Equation linking density, volume and mass of an object?

A

density = mass/volume

34
Q

What happens to the pressure of a gas in a sealed container when the temperature is increased?

A

Pressure increases with the temperature of a sealed container of gas.

35
Q

Explain why the temperature of a sealed container of gas affects the pressure of the gas.

A

As the temperature increases, the speed increases. Therefore the molecule collide with a greater force and more of them collide with the surface per second.

36
Q

How do you calculate the volume of a cuboid?

A

..

37
Q

How do you calculate the volume of a sphere?

A

..

38
Q

What state has particles which are least energetic?

A

Solid

39
Q

What state has particles which are most energetic?

A

Gas

40
Q

Describe the two difference between boiling and evaporation of a liquid?

A

Boiling occurs at the liquids boiling point, evaporation at a temperature below this point. Boiling occurs from throughout a liquid, evaporation occurs at the surface.