______ can make things happen

• standard

• forces

• unit

• bar

______ found out that forces can make objects speed up, slow down or change direction

• Albert Einstein

• John Philoponus

• Ibn Sina

• Isaac Newton

______ was a scientist who investigated forces in space

• Isaac Newton

• Ibn Sina

• Mae Jemison

• John Philoponus

______ is an equipment we use to measure the strength of a force

• thermometer

• ruler

• forcemeter

• clock

The standard unit of force is the ________

• newton (N)

• meter (m)

• gram (g)

• centimeter (cm)

You can make a simple forcemeter uses lines as a unit of force. It uses a _________

• standard unit

• non-standard unit

On Earth, a 100 gram (100 g) mass has a weight of _____ newton.

• 1

• 2

• 3

True of False: Forces can be measured with a forcemeter

• True

• False

True of false: Standard units are better than non-standard units because standard measurements make it easier to compare your measurements with other people's measurements

• True

• False

True or False: Gravity on earth is a force that pulls towards the centre of the earth

• True

• False