___________________________ force is the pulling and pushing forces of magnets.

When like poles of two magnets face each other, they _____________________ each other. This is a pushing force.

When unlike poles of two magnets face each other, they _____________________ each other. This is a pulling force.

_________________________ is a force that slows down moving objects in the air.

Aeroplanes and animals such as birds have ___________________ shapes that reduce the air resistance they face while in flight.

____________________ is a force that causes moving objects to slow down between any two surfaces in contact.

The ________________ the surface , the greater the friction.

State true or false. Friction allows us to hold objects firmly and enables us to walk.

Tick all those examples that are examples of problems created by friction.

Tick the two ways to reduce friction.

Earth exerts a pulling force on all objects towards the ground . This force is called ________________________ force.

Because of the Earth's gravity, all objects have _____________________

Who discovered gravity ?

State true or false. Gravity causes water droplets that are formed high in the sky to fall as rain.

__________ is the amount of substance in an object.

Mass can be measured using a _________________.

The unit of mass is _________ or __________________.

State true or false. The weight of an object is the force by which it is being puled downwards.

Tick the two instruments that can be used for measuring weights.