Answer the following question given this paragraph: Moving water has energy ( Figure above ). That energy is used to make electricity. Hydroelectric power harnesses the energy of water moving down a stream. Hydropower is the most widely used form of renewable energy in the world. This abundant energy source provides almost one fifth of the world's electricity. The energy of waves and tides can also be used to produce water power. At this time, wave and tidal power are rare. Q: Hydroelectric power harnesses the energy of what? Choices: - weather - heat - air - water A:
water
Answer the following question given this paragraph: The most common type of mirage is an illusion that light from faraway objects is reflected by a pool of water that is not really there. Mirages are generally observed in deserts, when there is a hot layer of air near the ground. Given that the refractive index of air is lower for air at higher temperatures, explain how mirages can be formed. Q: What term is used to describe an illusion that light from faraway objects is reflected by a pool of water that is not really there? Choices: - version - prototype - Mirror - mirage A:
mirage
Q: Answer the following question given this paragraph: Communications satellites carry solar panels to provide energy for their missions. Q: What do communication satellites carry and use to provide energy during their missions? Choices: - geothermal panels - batteries - infrared panels - solar panels A:
A: solar panels
Question: Answer the following question given this paragraph: The instantaneous velocity of an object is the velocity of the object at a given moment. If the object is moving with constant velocity, then the instantaneous velocity at every moment, the average velocity, and the constant velocity are all the same. Q: What is defined as the velocity of the object at a given moment? Choices: - specific gravity - relativistic velocity - inertia - instantaneous velocity A:
Answer: instantaneous velocity
*Question*
Answer the following question given this paragraph: A mycorrhiza (Greek for "fungus roots") is a symbiotic association between a fungus and the roots of a plant. In a mycorrhizal association, the fungus may colonize the roots of a host plant by either growing directly into the root cells, or by growing around the root cells. This association provides the fungus with relatively constant and direct access to glucose, which the plant produces by photosynthesis. The mycelia of the fungi increase the surface area of the plant's root system. The larger surface area improves water and mineral nutrient absorption from the soil. Q: A mycorrhiza refers to what kind of relationship between a fungus and the roots of a plant? Choices: - predator-prey - semantic - familial - symbiotic A:
**Answer**
symbiotic
*Question*
Answer the following question given this paragraph: The pointed pattern is a form of partial albinism, which results from a mutation in an enzyme that is involved in melanin production. The mutated enzyme is heat-sensitive; it fails to work at normal body temperatures. However, it is active in cooler areas of the skin. This results in dark coloration in the coolest parts of the cat's body, such as the lower limbs and the face, as shown in Figure above . The cat's face is cooled by the passage of air through the nose. Generally adult Siamese cats living in warm climates have lighter coats than those in cooler climates. Q: Partial albinism results from a mutation in an enzyme that is involved in the production of what? Choices: - cytoplasm - hair - cancer - melanin A:
**Answer**
melanin