Chemistry, 27.10.2020 21:40 RandomUser101
Ancient scientists proposed many theories based not only on scientific observations, but also on religion and philosophy. These scientists, including Aristotle and Ptolemy, had developed an early model of the solar system. This model appeared to describe the motions they observed in the heavens. Which of the following objects is at the center of this model?
A. sun
B. star
C. moon
D. Earth
Answers: 2
Chemistry, 22.06.2019 06:00, kylieweeks052704
Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.
Answers: 2
Chemistry, 22.06.2019 06:00, mbrisen7420
Compare and contrast physical changes with chemical changes.
Answers: 3
Ancient scientists proposed many theories based not only on scientific observations, but also on rel...
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