SCIENCE C.A.T. 2

Which of the following is not a property of air?

• It is everywhere

• It occupies space

• It has weight

• It endangers life

• It supports weight

A boy rides a skate board down a hill. Eventually the skate board stops. Which is the most responsible for causing the skate board to stop?

• Gravity acting on the skate board

• The weight of the boy

• The weight of the skate board

• Friction acting on the skate board

• None of the above

What is an example of an unbalanced force?

• A cat sitting on a chair

• An eagle resting on a tree

• A boy jumping off his bike

• A book lying on a desk

• Cooking ingredients in a sac

A force can ____________________________.

• make an object move

• make a moving object stop moving

• slow an object down

• Turn the direction of an object

• All of the above

What does the force of gravity do to objects?

• It makes them float

• It makes them bend

• It makes them jump

• It pulls them to the center of the earth

• It pushes them apart

An example of the force of gravity is _____________.

• A rocket flying through space

• A cloud moving across the sky

• The rising and setting of the Sun

• A ball falling to the ground after it has been thrown

• None of the above

_________ is the result of the weight of air pushing on an area or an object.

• Weather

• Air

• Air pressure

• Speed

• Mass

Which property of air is observed when air is filled in tyres?

• Air is needed for burning

• Air exerts pressure

• Air has weight

• Air occupies space

• Air is present everywhere

What type of friction is not moving?

• Static

• Sliding

• Fluid

• Rolling

The scientist who made a law about the force of gravity is _______.

• Albert Einstein

• Alexander Graham Bell

• Isaac Newton

• Michael Faraday

• John Bright