Topic 12 & 13 - The Particle Model and Forces and Matter 12 COMPLETE PK Flashcards Preview

GCSE Combined Physics (Edexcel) > Topic 12 & 13 - The Particle Model and Forces and Matter 12 COMPLETE PK > Flashcards

Flashcards in Topic 12 & 13 - The Particle Model and Forces and Matter 12 COMPLETE PK Deck (104)
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1

1 Name the three states of matter.

solid, liquid, gas

2

2 Which of the three states of matter can be compressed?

gases

3

3 Why can gases be compressed?

particles are far apart

4

4 Which of the three states have a fixed volume?

solids and liquids

5

5 Why do solids and liquids have a fixed volume?

particles are held together by bonds

6

6 Why do solids keep their shape?

Bonds between particles are very strong

7

7 Name a physical change.

any change of state named, such as melting, freezing

8

8 What does the density of a substance tell you?

the mass for a certain volume

9

9 What two quantities do you need to know to calculate density?

mass and volume

10

10 What are the units for these two quantities?

kg and m3; accept g and cm3

11

11 What are the units for density?

kg/m3 or g/cm3

12

12 What is the equation for calculating density?

density = mass/volume

13

13 What usually happens to the density of a substance when it melts?

decreases

14

14 Why does this happen?

particles are closer together in a solid than in a liquid

15

15 What happens to the mass of a substance when it melts?

stays the same

16

16 Is evaporating a physical or a chemical change?

physical

17

17 Why is evaporation a physical change?

no new substance is made

18

18 How is thermal energy stored in a substance?

movement of the particles

19

19 What does temperature tell you about the particles in a substance?

how fast they are moving/vibrating

20

20 What factors affect the amount of thermal energy stored in a substance?

mass, temperature, material

21

21 What property of a substance tells you about the movement of its particles?

temperature

22

22 How can you reduce the amount of thermal energy transferred between an object and its surroundings?

use insulation

23

23 Name two insulating materials.

wool, foam, bubble wrap, or any other sensible suggestions

24

24 Why does a kettle full of water store more energy than a cupful of water at the same temperature?

greater mass of water

25

25 Give two other quantities that affect the amount of thermal energy stored in an object.

temperature and material

26

26 What does specific heat capacity mean?

energy needed to raise 1kg of a substance by 1C

27

27 What happens to the temperature of a substance being heated when it changes state?

temperature stops rising while the change in state is happening

28

28 Why does this happen?

energy is being used to break bonds between particles

29

29 What does specific latent heat mean?

energy needed to change the state of 1kg of a substance

30

30 What are the units for specific latent heat?

J/kg