A galaxy can have millions or billions of stars.
What is a light source year 3.
They discuss what a light source is how most light sources are powered and why different rooms have different numbers of light sources.
They will explore shadows and learn how shadows are formed when a light source is blocked by an opaque item.
What is a light source.
Children could model how light travels from different sources in a straight line and how light is reflected from certain surfaces changing the direction it travels.
Stars are found in large groups called galaxies.
Answered a light source generates light using another form of energy such as heat or electricity.
All of the other stars we can see with our eyes are farther some even thousands of light years away.
The next closest star to us is about 4 3 light years away.
So when we see this star today we re actually seeing it as it was 4 3 years ago.
Though aimed at older children the idea of modelling light using a ribbon and other techniques used in this short demonstration could be used in year 3.
Notice that light is reflected from surfaces i can identify light sources in our school.
The new national curriculum introduced in 2014 requires children in year 3 to understand that they need light to see and that light is reflected from surfaces.