P3

Question 1

Particle Model

Answer 1

A model that describes the arrangement and movement of particles in a substance

Question 2

Solids

Answer 2

Particles are arranged in a regular arrangement and vibrate in a fixed position

Question 3

Liquids

Answer 3

Particles are randomly arranged, they can move past each other (flow) and particles are still very close together

Question 4

Gases

Answer 4

Particles are randomly arranged, far apart and move quickly and randomly

Question 5

Compressed

Answer 5

Means squashed. Gases can be
compressed because the
particles are far apart, Liquids
and solids cannot be comprassed
because the particles are too
close together

Question 6

Kinetic energy

Answer 6

Movement energy, Particles gain
kinetic energy when the
temperature Increases. Gas
particles have more kinetic
energy than solids or liquids

Question 7

What os the formula for Density

Answer 7

Density = Mass/Volume

Question 8

What are the units for mass, density and volume

Answer 8

Density = Kg/m3
Mass = Kg
Volume = m3

Question 9

Explain the differences in density between solids. liquids and gases

Answer 9

Solids have the highest density because the particles are closely packed, Gases
are the least dense as there is a lot of space between particles

Question 10

What happens to mass during a change of state

Answer 10

Stays constant

Question 11

What two things can happen when you heat a system

Answer 11

Temperature can increase and state can change

Question 12

How do you measure the volume of a regular object

Answer 12

Measure the length of the three sides and multiply together

Question 13

Internal energy

Answer 13

Internal energy is the total kinetic energy and potential energy of all the particles
(atoms and molecules) that make up a system, Internal energy = total kinetic + total
potential energy

Question 14

Density

Answer 14

The word density means how much mass (particles) there are in a given volume (space)

Question 15

Regular shaped object

Answer 15

An object that we can calculate the volume of using common formula e.g a cube

Question 16

irregular shaped object

Answer 16

An object that you cant find the volume of using common formula e.g a chess peice

Question 17

Specific Latent Heat

Answer 17

The energy needed to change state of 1kg of a substance without changing temperature

Question 18

Specific Heat Capacity

Answer 18

The energy needed to heat up 1kg of a material by a temperature of 1C

Question 19

What is the formula for Specific heat capacity

Question 20

What is the formula for specific latent heat

Answer 20

E = m x l

Question 21

Why doesn’t the temperature of a material change as it changes state

Answer 21

Energy goes into making/breaking bonds

Question 22

what happens to pressure if the size of a container is reduced

Answer 22

The pressure would increase as particles would hit the walls of the container more often

Question 23

How do you measure the volume on an irregular object

Answer 23

Fill a eureka can, place object in the water and collect displaced water. Measure the volume of displaced water

Question 24

How do you calculate constant

Answer 24

pressure x volume = constant