Gravity

What happens when an object is dropped?

• gravity  pulls it downwards, towards  the centre of the Earth

• the weight of the object makes it fall.

We have learnt that on Earth everything falls towards the centre of the Earth because of the:

• pull of gravity

• push of gravity

Who developed the first description of the force of gravity?

• Stephen Hawking

• David Attenborough

• Sir Issac Newton

• Galileo

What made Sir Issac Newton start to think about gravity?

• when an apply hit him on the head

• when he was watching an apple fall from a tree

Fill in the blank:

Gravity acts on everything which has ____________.

• Weight

• Density

• Mass

• Speed

Mass and weight are the same thing.

• True

• False

The definition of Mass is:

• an invisible force that pulls objects toward each other

• the amount of matter or substance that makes up an object

• the measure of the force of gravity on an object

• the name for a force that pulls everything down toward the centre of the Earth

The definition of Weight is:

• the amount of matter or substance that makes up an object

• the measure of the force of gravity on an object

What are controlled variables?

• things that are kept the same in an experiment

• things that are changed in an experiment

• some things stay the same and some things change in an experiment

Do all objects fall at the same rate?

• Yes

• No