Biology, 23.02.2021 19:50, raynamg2718
Which of the following would scientists say is true about the universe?
A. The universe started out very cold and is getting
hotter with time.
B. The universe started out very dense and has become less dense with time.
C. The universe is the same age as the Earth.
D. The universe and our galaxy are the same thing.
Answers: 3
Biology, 21.06.2019 14:30, Franklyn3220
Why are small quantities of chlorofluorocarbons so harmful to the ozone layer? a. the chlorofluorocarbons act like ultraviolet radiation causing large amount of ozone to be produced. b. the chlorine from the chlorofluorocarbons reacts with free molecules of oxygen causing a stop in ozone production c. free oxygen atoms can replace the chlorine in chlorine monoxide, releasing a free atom of chlorine which can then recombine with an oxygen atom in ozone, destroying more ozone. d. chlorofluorocarbons absorb ultraviolet radiation, preventing the formation of ozone select the best answer from the choices provided
Answers: 1
Biology, 22.06.2019 07:50, darceline1574
Which of the following types of stars is most likely to end up as a supernova? in graph a, the curve peaks at 800 nm, in the red section of the visible light spectrum. in graph b, the curve peaks at 550 nm, in the green section of the visible light spectrum. in graph c, the curve peaks at 450 nm, in the blue section of the visible light spectrum. in graph d, the curve peaks at 300 nm, in the violet section of the visible light spectrum. a b c d
Answers: 2
Biology, 22.06.2019 16:00, kcdavis318
Why are some places regularly warmer or cooler than others in a given month
Answers: 3
Which of the following would scientists say is true about the universe?
A. The universe started out...
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