All About Light 

You wake up in the morning after a great night's sleep and open you eyes. The Sun is shining bright in the morning sky. Sunlight passes through you window and into you bedroom. It lights up the room and helps you to see the things around you. Look out your window and the light from sun lights up everything out side too.
Light is a form of energy. It helps us to see. Without light, you wouldn't be able to see the sky light up as the sun rises... and sets.
You wouldn't be able to see the beautiful colors in a rainbow or the stars and moon on a clear night. You wouldn't see things inside either. In fact, without light, you wouldn't be able to see anything at all. You'd be in darkness. Darkness is when there is no light.
The sun is our main source of light during day. A source of light is anything that give out light of its own. Fire, lightning and the stars we see at night are natural sources of light too.
At night, when the sun sets, we need other sources of light to see the things around us. We use lights in our homes, streets, cities and sports stadiums. Car headlights, lamps and flashlights help us to see too. Because things like lights, headlights and flashlights are made by people, they are called artificial sources of light. Can you think of any other artificial sources of light?
Besides helping us to see the things around us...which is very useful - we use light in other ways too. Television screens, phone screens and computer monitors use light too. They are used for entertainment, education and communication. Traffic lights, traffic signals, sirens and lighthouses make use of light to send important signals and messages.
On Earth, the light from the Sun is REALLY important in another way too. Plants use the energy in sunlight to make the food they need to live and grow - a processes called photosynthesis. The energy in the food plants make is then passed to people and other animals when they eat plants and other animals for food. Check out our related videos on plants and photosynthesis to find out more.