A push or pull applied on a body is called _____.

We can see things with the help of __________________.

A resting body can move when _______ is applied.

Sun is a ______________ object.

When an object blocks the path of light, a_____________ is formed.

A loud and unpleasant sound is called _____________.

Friction _________________ a moving object.

We see non-luminous objects when light __________ on them.

Whispering is a _____________ sound.

We hear sound with the help of our ____________.

We should speak _________.

__________ materials allow light waves to pass through easily.

Opaque means...