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Q: What quality of sound makes a tuba and a piccolo very different to a listener? Read this paragraph and choose the correct option from the provided answers: A piccolo and a tuba sound very different. One difference is the pitch of their sounds. Choices: - wavelength - tune - curve - pitch A:
(Answer)
pitch

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Q: In the universe as a whole, what is the most common element? Read this paragraph and choose the correct option from the provided answers: Abundance The elements vary widely in abundance. In the universe as a whole, the most common element is hydrogen (about 90% of atoms), followed by helium (most of the remaining 10%). All other elements are present in relatively minuscule amounts, as far as we can detect. On the planet Earth, however, the situation is rather different. Oxygen makes up 46.1% of the mass of Earth's crust (the relatively thin layer of rock forming Earth's surface), mostly in combination with other elements, while silicon makes up 28.5%. Hydrogen, the most abundant element in the universe, makes up only 0.14% of Earth's crust. Table 2.1 "Elemental Composition of Earth" lists the relative abundances of elements on Earth as a whole and in Earth's crust. Table 2.2 "Elemental Composition of a Human Body" lists the relative abundances of elements in the human body. If you compare Table 2.1 "Elemental Composition of Earth" and Table 2.2 "Elemental Composition of a Human Body", you will find disparities between the percentage of each element in the human body and on Earth. Oxygen has the highest percentage in both Saylor URL: http://www. saylor. org/books. Choices: - helium - carbon - oxygen - hydrogen A:
(Answer)
hydrogen

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Q: Newton realized that the nature of gravity on earth that pulls an apple to the ground could explain the motion of these? Read this paragraph and choose the correct option from the provided answers: As has been noted in numerous Things Great and Small vignettes, this is not the first time the large has been explained by the small and vice versa. Newton realized that the nature of gravity on Earth that pulls an apple to the ground could explain the motion of the moon and planets so much farther away. Minute atoms and molecules explain the chemistry of substances on a much larger scale. Decays of tiny nuclei explain the hot interior of the Earth. Fusion of nuclei likewise explains the energy of stars. Today, the patterns in particle physics seem to be explaining the evolution and character of the universe. And the nature of the universe has implications for unexplored regions of particle physics. Cosmology is the study of the character and evolution of the universe. What are the major characteristics of the universe as we know them today? First, there are approximately 10 11 galaxies in the observable part of the universe. An average galaxy contains more than 10 11 stars, with our Milky Way galaxy being larger than average, both in its number of stars and its dimensions. Ours is a spiral-shaped galaxy with a diameter of about 100,000 light years and a thickness of about 2000 light years in the arms with a central bulge about 10,000 light years across. The Sun lies about 30,000 light years from the center near the galactic plane. There are significant clouds of gas, and there is a halo of less-dense regions of stars surrounding the main body. (See Figure 34.3. ) Evidence strongly suggests the existence of a large amount of additional matter in galaxies that does not produce lightthe mysterious dark matter we shall later discuss. Choices: - seasons - atoms and quarks - molecules - moon and planets A:
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moon and planets