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Biology, 27.01.2021 06:20 journeyhile5
true or false? harmful rays from the sun, called gamma rays, make up about 10% of the rays that reach the earth
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Biology, 21.06.2019 18:00, shelbyo1123
The phlogiston theory in the 17th century attempted to explain burning. the theory stated that combustable objects contained a material called phlogiston, a substance without mass, color, odor, etc. after objects burned, the objects were dephlogistonated and were then in their true form. the phlogiston theory was accepted until the 18th century, when lavoisier proved that combustion requires a gas that has mass. phlogiston is considered a) to be scientific knowledge b) not to be scientific knowledge c) to be proven by scientific method d) to be accepted in the modern scientific community
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Biology, 22.06.2019 00:30, quigley523
What was the land like over 500 million years ago? what was under the sea?
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true or false? harmful rays from the sun, called gamma rays, make up about 10% of the rays that reac...
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