Wedi’i anelu at ddisgyblion 7-11 oed, mae’r gweithgaredd hwn yn rhoi cyfle ymarferol i'r disgyblion i ddysgu am y dydd a’r nos. Gan ddefnyddio pêl o play-doh a thortsh, bydd y disgyblion yn darganfod sut mae cylchdro'r Ddaear yn achosi’r dydd a’r nos.
Day and Night
In this workshop you will use whole sky movies to help you understand what different people around the world experience as our planet spins once every 24 hours. The following sections will guide you through different aspects of the relationship between Earth's rotation, orbital path and tilt towards the Sun.
In this workshop you will use a speeded-up simulation of the visible sky to help you understand why we experience night and day on our planet.
Have you noticed that your shadow doesn't always look the same? Our cartoon shows why shadows change during the day.
When an object (like the stick in the cartoon) blocks some of the Sun's light, it casts a shadow. The shadow always points away from the Sun. How long the shadow is depends on how low or high the Sun is in the sky. If the Sun is low, we see a longer shadow. Is the Sun is high, we see a shorter shadow.
The Earth is always spinning on its axis. It takes 24 hours to spin around once, so it rotates once a day. The Earth spins at over 1,500 km an hour! That's more than 4 times faster than a Formula 1 car racing at top speed!