Lesson 1 of 13
Where a day came from
Show on a big screenEvery morning the Sun rises in the east. In the evening it sets in the west. Does the Sun really move round us?
Step 1 of 4
- The Earth spins. Here it is sunrise.
- Later it is noon. This side faces the Sun.
- Then sunset.
- The far side is midnight. One more turn brings sunrise again.
New word
- Mean solar day — the average time between two highest Suns.
The rule
No. The Earth spins, so the Sun seems to move. The Earth's axis is the line joining its two Poles.
The Earth spins on its axis. So the Sun seems to rise and set. The time from one highest Sun to the next is a day. It is about 24 hours.
Pick a time of day. See where you are on the Earth.
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Try the lab to finish this lesson.