Q: When the sun is below the horizon and thus not visible on a direct line, the light path will bend slightly and thus make the sun visible by what? Read this paragraph and choose the correct option from the provided answers: Because air is slightly more optically dense than a vacuum, when sunlight passes from the vacuum of space into our atmosphere, it bends slightly towards the normal. When the sun is below the horizon and thus not visible on a direct line, the light path will bend slightly and thus make the sun visible by refraction. Observers can see the sun before it actually comes up over the horizon, or after it sets. Choices: - reflection - thermal - infrared - refraction A:
refraction
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Q: What two lenses comprise a compound microscope? Read this paragraph and choose the correct option from the provided answers: Figure 26.16 A compound microscope composed of two lenses, an objective and an eyepiece. The objective forms a case 1 image that is larger than the object. This first image is the object for the eyepiece. The eyepiece forms a case 2 final image that is further magnified. Choices: - polarized and focal - scope and focus - concave and convex - objective and eyepiece A:
objective and eyepiece
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Q: What is the area of our universe that isn't stars and galaxies called? Read this paragraph and choose the correct option from the provided answers: We see many objects out in space that emit light. We see other objects that emit other types of electromagnetic radiation. The matter we can see is contained in stars. The stars are contained in galaxies. Scientists think that stars and galaxies make up only a small part of the matter in the Universe. The rest of the matter is called dark matter . Choices: - nebula - solar systems - galaxies - dark matter A:
dark matter
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Q: The addition of starting materials and the removal of end products prevent metabolism from reaching what state? Read this paragraph and choose the correct option from the provided answers: Choices: - constant - inequality - imbalance - equilibrium A:
equilibrium
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