Chapter 8: Forces In Action

Question 1

No cantact force

Answer 1

When with no contact a object may move

Question 2

Contact force

Answer 2

When one object makes contact with another

Question 3

Gravity

Answer 3

A pulling down force. This is a non contact force

Question 4

Permanent magnets

Answer 4

These keep their magnetic forces when away from other magnets

Question 5

Temporary magnets

Answer 5

These lose their magnetism when away from other magnets

Question 6

Repulsion

Answer 6

A force in which objects move away from each other

Question 7

Attraction

Answer 7

A force in which objects are pulled closer together

Question 8

Force

Answer 8

A push or pull in a particullar direction. they occur around us all the time. Exzamples are pushing a door open, pushing a handle or pulling open your locker

Question 9

Magnetic fields

Answer 9

They are Areas where the magnetic force acts

Question 10

Domains

Answer 10

Domains are little magnets that determin if a item will be magnetic or not

Question 11

Non magnetic domains

Answer 11

The domains inside a object are facing different dirrections so they cancel each other out

Question 12

Magnetic domains

Answer 12

Domains that face the same dirrection making the object magnetic

Question 13

Electro magnet

Answer 13

A magnet that when is touched with electricity from a battery has its domains lineup

Question 14

Atoms

Answer 14

Very small objects that make up things and the atoms match that item by having the sam ppe property

Question 15

Neucleus

Answer 15

The inside cell that acts as a control point

Question 16

Electrons

Answer 16

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

Question 17

Negative electric charge

Answer 17

A atom that more electrons than protons

Question 18

Protons

Answer 18

Heavy but tiny objects in a necleus that have a positive electrical charge

Question 19

Positive electrical charge

Answer 19

A atom that has fewer electrons than protons

Question 20

Neutrons

Answer 20

Tiny but heavy particals in a necleus that has no electrical charge

Question 21

Neutral

Answer 21

A object with a even amount of protons and electrons

Question 22

Static electricity

Answer 22

The build up of energy in one place

Question 23

Insulators

Answer 23

Materials that wont allow electricity to go through them

Question 24

Conducters

Answer 24

Materials that allow electricity to go through them

Question 25

Lightning rod

Answer 25

A conductive metal rod attached to buildings so the lightning hits the rod and not the building

Question 26

Mass

Answer 26

The measure of the amount in a object

Question 27

Wieght

Answer 27

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 mas

Question 28

Newton

Answer 28

The unit for measuring forces

Question 29

Air resistance

Answer 29

The force of the air pushing at a object through the air

Question 30

Terminal speed

Answer 30

The constant speed reached by a falling body. A body reaches terminal speed when the force of gravity pulling it down is balanced by the air resistance pushing against it

Question 31

Boyance

Answer 31

The force which keeps and object floating

Question 32

Surface tension

Answer 32

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