science grade 4 revision

The force that sends the rocket forward is called

• thrust

• drag

• speed

• gravity

The force that makes an aeroplane rise is called

• drag

• thrust

• lift

• gravity

Force that pulls the object towards earth

• lift

• friction

• gravity

• buoyancy

A push or a pull is

• force

• acceleration

• motion

• speed

Distance of the object in certain period of time is called

• acceleration

• force

• speed

• motion

The force that slows a vehicle as it moves through a liquid or a gas is called

• thrust

• drag

• lift

• force

When a object changes speed or direction it

• rotates

• speed increases

• accelerates

• stops

solution to a problem is

• design process

• technology

A scientist who designs new cars is a

• doctor

• engineer

• designer

• teacher

To invent a solution to a problem , we use

• technology

• engineer

• design process

• recycling method