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The first law of thermodynamics states that energy can't be created or destroyed. If people can't create energy, where do we get energy to do work? the Sun and moon food and fossil fuels our heart and mind Earth's orbital momentum
Weegy: The correct answer is the sun and the moon. User: the law of ____suggests that older rock strata are at the bottom, and younger rock strata are at the top. A.original horizontality B.superposition C. original lateral continuity D. cross- cutting or instrusive relationships Weegy: The answer is B. superposition (More)
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Asked 6/25/2012 10:42:46 AM
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Because cosmologists can't go out into space and test all of their theories, they must depend on the cosmological principle. This principle assumes that _____. the universe stays at a steady state any physical laws are the same for the entire universe the universe is going to eventually collapse the universe is cooling down
Weegy: B.any physical laws are the same for the entire universe User: Just like our bodies, Earth's cycles tend to maintain a balance or____ A.hydration B.instability C.internal temperature D.equillibrium Weegy: B)equilibrium User: Hydropower _____. uses the energy of moving water is a nonrenewable energy source releases toxins, like nitrogen oxide depends on time of day and time of year Weegy: A.) uses the energy of moving water. "Hydr" is the Greek root of "water" User: Many mass extinctions of life occurred due to major changes in _____. meteor impacts Earth's core climate water sources Weegy: climate User: Which of the following tests can help identify a mineral? Scratch it against a streak plate to see the color of its residue. Place it in water and see if it floats. Hold light to it and examine its luster. Hit it with a hammer and see how it breaks. Examine its texture and see if it's rough, smooth, or glassy Weegy: all of those can be ways to identify a mineral User: What object in our solar system has the greatest gravitational pull, and why? Mercury, because it's the smallest planet in the solar system. The moon, because it's able to keep Earth balanced on its axis. Earth, because it's able to keep water and an atmosphere that supports life. The Sun, because it's the largest body in the solar system. Weegy: D. The Sun, because it's the largest body in the solar system. User: Which of the following tests can best help you classify a rock as sedimentary, metamorphic, or igneous? Pour acid on it and see if it bubbles. Examine its layers, texture, and color. Hold a light to it and examine its luster. Examine its streak color. Weegy: Examine its layers, texture, and color. User: Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. The decay rates of isotopes are constant and are expressed as_____ A. half-lives B.daughter isotopes C.parent isotopes ... (More)
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Asked 6/25/2012 10:48:04 AM
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Jonah finds a rusty nail outside. The nail is an example of _____. chemical weathering biological weathering physical weathering
Weegy: A rusty nail is an example of chemical weathering caused by oxidation. (More)
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Asked 6/25/2012 1:34:42 PM
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