Step 4 of 18 · Observing the universe · SC4-OTU-01
Day, night and seasons
Earth spins, Earth orbits, and Earth is tilted — three different results.
1
Learn it
Explain day and night, the year and the seasons using Earth's rotation, revolution and tilt
Idea 1 of 4
Rotation makes day and night
Earth spins on its axis once every 24 hours. The half facing the Sun has day; the half facing away has night. The Sun only appears to cross the sky — it is us that turns.
2
Know it by heart
Say each one in your head, then tap to check.
3
Try it
Play — nothing here is marked
Loading the solar system…
4
A full-marks answer
Explain why it is summer in Australia in December.
3 marksBuilt one line at a time — say the next line before you reveal it
- Earth's axis is tilted at 23.5°.(the cause — name the tilt)
2 to go
5
Words to know
Tap a card to flip it
Step 4 · last bit
Ready? Prove it.
A round of ten. Score 8 or more and this step is done — then on to moon phases and eclipses.