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End of Semester Test
Gas cloud 1 is likely to form a star. Gas cloud 2 is not. Based on this information, match the given conditions with each cloud.
Its temperature stays well
below 14 million Kelvin
Its volume shrinks and density
increases due to gravity
Its temperature surpasses
14 million Kelvin
Its hydrogen atoms shed their electrons.
It is spread out, with a greater volume and
lesser concentration of elements
Its hydrogen atoms retain their electrons.
gas cloud 1
gas cloud 2

Group control group #1 experimental group yes yes yes control group #2 no new drug orange juice bed rest no yes no yes ves which of the following is the best explanation of why a second control group was included in this experiment? o a. to provide the volunteers in the study with something to drink o b. to prove that the common cold cannot be cured c. to confuse anyone who is trying to steal their new drug and sell it as their own invention o d. to researchers conclude that results are related to the new drug and not to the orange juice submit e previous