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Science
5th
grade
Mystery Science Space Ship Earth #2 -Who set the first clock
5 questions
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- 1. Multiple Choice
1. In ancient times, why would a cloudy day make it hard to know what time it was?
no shadows
It would not make it difficult.
Ancient people used shadow clocks to tell time. Without the sun, you can't use a shadow clock.
The clouds would block the gears on the clocks.
- 2. Multiple Choice
Say one morning the Earth suddenly stopped spinning. Would a shadow clock still work? Explain.
No
Yes
If the earth stopped spinning a shadow clock would show the wrong time.
A shadow clock only works because the shadow moves across the dial. So if the Earth stopped spinning, the shadow clock would be useless!
- 3. Multiple Choice
The planet Mercury takes 176 days to do one spin around its pole. Compared to the Earth, would the Sun appear to move more quickly across Mercury's sky or more slowly? Why?
The Sun would appear to move much more slowly across Mercury's sky than Earth's sky, because Mercury spins much more slowly than the Earth.
The Sun would appear to move much more quickly across Mercury's sky than Earth's sky, because Mercury spins much more squickly than the Earth.
More quickly
More slowly
- 4. Multiple Choice
A girl named Lindsey has 4 creases on each finger instead of 3. If she counts like an Egyptian, what number will she count to with one hand?
20
Lindsey will count to 16 with one hand.
16
Lindsey will count to 20 with one hand.
- 5. Multiple Choice
5. Lindsey built a clock with 16 divisions, which we’ll call Lindsey Hours. Just like our clocks, the hour-hand on Lindsey’s clock goes around twice per day. How many Lindsey Hours are in one day?
40
32
There are 32 Lindsey Hours in one day. (16 hours +16 hours = 32 hours)
There are 40 Lindsey Hours in one day. (20 hours + 20 hours = 40 hours)
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