(Question)
Q: What do you call egg-shaped galaxies, which are reddish to yellowish in color because they contain mostly old stars? Read this paragraph and choose the correct option from the provided answers: Pictured below is a typical elliptical galaxy ( Figure below ). As you might have guessed, elliptical galaxies are elliptical, or egg-shaped. The smallest elliptical galaxies are as small as some globular clusters. Giant elliptical galaxies can contain over a trillion stars. Elliptical galaxies are reddish to yellowish in color because they contain mostly old stars. Choices: - conical galaxies - irregular galaxies - spiral galaxies - elliptical galaxies A:
(Answer)
elliptical galaxies

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Q: What is the most important element to life? Read this paragraph and choose the correct option from the provided answers: Carbon is the most important element to life. Without this element, life as we know it would not exist. As you will see, carbon is the central element in compounds necessary for life-organic compounds. These compounds include carbohydrates, lipids, proteins and nucleic acids. Choices: - oxygen - hydrogen - nitrogen - carbon A:
(Answer)
carbon

(Question)
Q: Splitting of the nucleus of a radioactive atom into two smaller nuclei yields what type of reaction, which releases a great deal of energy from a small amount of matter? Read this paragraph and choose the correct option from the provided answers: Nuclear fission is the splitting of the nucleus of a radioactive atom into two smaller nuclei. This type of reaction releases a great deal of energy from a very small amount of matter. Fission of a tiny pellet of radioactive uranium-235, like the one pictured in the Figure below , releases as much energy as burning 1,000 kilograms of coal!. Choices: - solar fission - nucleation - nuclear fusion - nuclear fission A:
(Answer)
nuclear fission