Physics

Question 1

What is meant by potential difference?

Answer 1

The push that makes a charge move around a
circuit

Question 2

What is speed?

Answer 2

How far something has travelled in a particular time.

Question 3

What is the overall charge of an atom?

Answer 3

Neutral

Question 4

Fill in the blank:

Electrons give a ________charge

Answer 4

Negative

Question 5

What units are moments measured in?

Answer 5

Nm

Question 6

State 2 ways you can increase gas
pressure.

Answer 6

Increase the temperature. Decrease the volume of the container

Question 7

Explain how convection works

Answer 7

Particles get heated and spread out. They become less dense and rise. When they rise they lose heat to the surroundings and cool. They then become dense and sink. This process is a convection current.

Question 8

What is speed usually measured in?

Answer 8

Metres per second or cm per second.

Question 9

What are the 7 main stores of energy

0-1 for 1, 2 for 2, 3-4 for 3, 5-6 for 4, 7 out of 7 for 5 confidence.

Answer 9

Magnetic.
Thermal
Chemical.
Kinetic.
Electrostatic.
Elastic potential.
Gravitational potential.
Nuclear.

Question 10

What are the 3 subatomic particles in an atom?

Answer 10

Protons, neutrons and electrons

Question 11

What does it mean for a gas to be
compressed?

Answer 11

Squashing the particles into a smaller space

Question 12

How is energy transferred in a light bulb?

Answer 12

Electricity → Light and Heat

Question 13

What do you measure energy in?

Answer 13

Joules/ kilojoules

Question 14

Can you compress a liquid?

Answer 14

No. 😃

Question 15

What happens when particles heat up?

Answer 15

As particles heat up they gain kinetic energy and vibrate or move faster

Question 16

Fill in the blank:

Protons give a ________ charge

Answer 16

Positive

Question 17

What do you need to make an electromagnet?

Answer 17

A strong, electrical magnet

Question 18

What is the symbol for resistance

Answer 18

Ω

(ohms)

Question 19

What happens to the atmospheric
pressure if you go higher up? Why?

Answer 19

It decreases. Gravity pulls the particles down.

Question 20

What is a kilo-Joule?

Answer 20

A thousand Joules

Question 21

What unit is potential difference measured in?

Answer 21

Volts

Question 22

What materials are good at convection?

Answer 22

Fluids (gases and liquids)

Question 23

What happens to the current in a parallel circuit?

Answer 23

It splits up at the junction

Question 24

What does the law of conservation of energy state?

Answer 24

That energy is neither created nor destroyed. Only transferred.

Question 26

Radiation uses ________ to transfer heat.

Answer 26

Waves

Question 27

What equation can be used to calculate
resistance?

Answer 27

Resistance = Potential difference ÷Current

Question 28

State 3 examples of circuit components

Answer 28

Bulb, buzzer, motor, resistor, IC, LED, Diode, Switch,

Accept any 3 from the list above ^^^

Question 29

What 4 materials are magnetic?

Answer 29

Iron, steel, cobalt, nickel

Question 30

What are the 2 types of electrical charge?

Answer 30

Positive and negative