When they are in the shade, it's night time. SEYMOUR: Hello, Seymour Science here ... and months and years. Let's make a model of the Earth and the Sun. Place a ball on a stick or hang it from ...

When an area is in darkness, we call it night-time. Our planet Earth actually tilted. This means that at certain times in our year ... Science here! As we all know, sometimes it’s day ...