Biology, 20.05.2021 20:20 Anabel818

What do YOU think of global warming?

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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, ijustneedhelp29

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Biology, 22.06.2019 05:30, KArrington815

The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen

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Biology, 22.06.2019 13:00, Evilgus4846