When did pangaea begin to break apart?
a.
20 million years ago
c.
250 mill...
Answers: 2
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Match the following items. 1. high-intensity bundle of energy being emitted from some decaying nuclei gamma ray 2. particle radiating from the nucleus of some atoms beta particle 3. negative particle identical to an electron but radiating from a decaying nucleus alpha particle
Answers: 1
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Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt
Answers: 1
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How do dying stars contribute to the formation of planets
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