Science

What does a ruler measure?

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Which Pioneer spacecraft first visited the planet Saturn?
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John Glenn was the first American to orbit the earth, in how long a flight?
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Which is the slowest orbiting planet?
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Which of these objects is an example of a simple machine?
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Which abbreviation refers to a term that literally means "below red"?
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What are plants that need two years to complete its life cycle?
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What is the process by which a plant grows from a seed?
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What cells store food in the roots?
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