SCI-4.7- Light, sound, heat and electrcty

These sources come to earth through natural means which man cannot control.

• natural sources

• artificial sources

comes from sources that man produces and controls.

• artificial sources

• natural sources

Tell if it is “ natural “ or “artificial” sources of light .-sun

Tell if it is “ natural “ or “artificial” sources of light . -aurora

Tell if it is “ natural “ or “artificial” sources. -stars

Tell if it is “ natural “ or “artificial” sources. - fire-fly

Tell if it is “ natural “ or “artificial” sources of light. - lamp

Tell if it is “ natural “ or “artificial” sources of light.- matches

• artificial

• natural

Tell if it is “ natural “ or “artificial” sources of light. -candle

• artificial

• natural

_____ is a form of energy which enables you to see.

• light

• natural sources

• artificial sources