4. Light, Sound and Force

Light travels in ________ lines.

• space

• directions

• bounces

• straight

The natural source of light and heat is ___.

• fox

• translucent

• sun

• prism

A dark area of surface created by an object blocking light.

• shadow

• opaque

• transparent

• reflect

A form of energy which help us to see is _____.

• heat

• electricity

• light

• sound

Unpleasant sounds are called ___

• music

• dance

• noise

Beating of drum is a soft sound.

• True

• False

A push or pull on an object is called ____.

• light

• force

• sound

Identify the natural luminous object.

• 
• 
• 

Outdoor shadows are shorter at _____.

• mornings

• noon

• night

Natural non luminous object is ___

• pen

• pencil

• moon