How Objects Change Shape
What makes objects change their shape?
Force
________ tells us how fast something moves.
Speed
Does gravity act upon contact or from a distace?
From a distance
Most forces are ..... They occur when two objects come into contact.
Contact forces.
What is the name of the force that pulls everything towards the centre of the Earth?
Gravity
A block of clay is an example of:
A Permanent Change of Shape
A Temporary Change of Shape
A permanent change of shape
_______ is the force that slows down a moving object when it is in contact with another object.
Friction
What is an example of gravity affecting movement?
Dropping or throwing an object.
What are the two forces we can exert on an object?
Pushing and pulling
What kind of force occurs when a paperclip moves towards an iron bar?
Magnetic Force
What is an example of a rigid object that will break when enough force is applied?
Glass, a wooden board, etc.
What is it called when friction happens when an object moves against a liquid or gas?
Where does gravity attract all objects on Earth?
Towards the center of the Earth
Most forces ________ objects. Example: hitting a ball with a racket
Repel
Driving a boat through the sea is an example of what?
Water resistance
________ objects do not change their shape. These objects will break if sufficient force is applied to them.
Rigid
Berta riding her bike into the wind is an example of what?
Air resistance
Who was the scientist who discovered gravity?
Isaac Newton
What are the two types of forces that happen from a distance?
Magnetic force and Gravity
If Berta travels 18 kilometres in three hours on her bike, what is her speed per hour?
6 km/h
A rubber duck is an example fo what type of shape change?
A Temporary Change in Shape
What is the unit we use to measure speed?
Kilometres per hour (km/h)
Gravity also attracts the ______ and makes it orbit the Earth.
Moon
When two people apply the same amount of force to opposite ends of a rope, what happens?
The rope does not move.
What did Isaac Newton call his famous discovery about gravity?
The Law of Gravitation