Science

What is another name for a "shadow clock"?

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What is a space which is entirely devoid of matter called in science terms?
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What form of energy are we using when we use an alarm clock or a dishwasher?
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What type of reproduction uses only one parent cell?
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On average how many miles is Pluto away from the Sun?
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A ramp is an example of which of these simple machines?
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What causes the moon to shine?
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What famous scientist introduced the concept of "space-time"?
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What system of measurement is used in science?
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