8.4Forces

Question 1

Permanent magnets

Answer 1

Magnets that retain magnetism even when magnets are removed from other magnets

Question 2

Temporary magnets

Answer 2

Are magnets that loose there magnetism when removed from other magnets

Question 3

Repulsion

Answer 3

An opposing force

Question 4

Magnetic field

Answer 4

Region around a magnetic material or a moving electric charge

Question 5

Atoms

Answer 5

A very small particle that makes up all things. Atoms have the same properties as the objects they make up

Question 6

Negatively Charged

Answer 6

A charge negatively

Question 7

Positively Charged

Answer 7

A charge positively

Question 8

Protons

Answer 8

Tiny, but heavy, particle found in the nucleus of an atom. Protons have a positive electrical charge

Question 9

Neutrons

Answer 9

Tiny, but heavy, particles found in the nucleus of an atom. Neutrons have no electrical charge

Question 10

Electrons

Answer 10

Very light, negatively charged particles inside an atom. Electrons move around the central nucleus of an atom

Question 11

Insulators

Answer 11

Materials that do not allow electric charge to flow through them

Question 12

Conductors

Answer 12

Materials that allow electric charge to flow through them

Question 13

Gravity

Answer 13

The force of attraction that exists between any two bodies in the universe that have mass. The gravity at the Earth’s surface is the pull on objects near its surface towards the centre of the Earth

Question 14

Contact Force

Answer 14

A force that acts only between objects that are touching

Question 15

Non-contact Force

Answer 15

A force that acts between objects even though the objects are not touching

Question 16

Magnetic Forces

Answer 16

The force (a push or pull) that acts between magnets (including the Earth) and magnetic objects

Question 17

Electrostatic Forces

Answer 17

A non-contact force of electric charges at rest. We experience electrostatic forces when we pull off a jumper and our hair stands on end

Question 18

Force

Answer 18

A push, pull or twist. Forces are measured in newtons (N)

Question 19

Mass

Answer 19

A measure of the amount of material in an object of substance

Question 20

Weight

Answer 20

A measure of the size of the gravity force pulling an object towards the centre of a massive body, such as the Earth. The weight of an object depends on the object’s mass

Question 21

Newton

Answer 21

The unit for measuring forces

Question 22

Air resistance

Answer 22

The force of air pushing on an object as the object moves through the air

Question 23

Buoyancy

Answer 23

A force which keeps objects floating

Question 24

Surface Tension

Answer 24

The ‘firmness’ of the surface of a liquid created by the attraction between particles at the surface. The surface acts like an elastic skin