Fact 1: Microbial fuel cells convert chemical energy into electrical energy. Fact 2: Electrical energy can be converted into kinetic energy and heat energy by an electric motor. Given the two facts above, microbial fuel cells convert chemical energy into what?
OPTIONS:
- Something with exactly eight protons
- Something studied by Michael Faraday
- scraping oneself on a contaminated object
- Something that moves in an elliptical orbit
- skin redness and pain, possible swelling, blisters, fever, headaches
- remove toxic material from the stomach before it is absorbed
- Something that can be converted to kinetic and heat energy by a motor
- Something made of glass, fiberglass, polyethylene, or vinyl
Something that can be converted to kinetic and heat energy by a motor
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Fact 1: Aging is associated with the death of cells. Fact 2: Cell death is natural. Given the two facts above, what is natural?
OPTIONS:
- Spruce
- artificial sweetener
- aging
- wetland
- fake purses
- wind
- imitation crab
- Light
aging
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Fact 1: Decomposition increases amount of organic matter in soil. Fact 2: Composting is simply the natural decomposition of organic matter. Given the two facts above, what increases the amount of organic matter in soil?
OPTIONS:
- raining
- shedding
- mussels
- raking
- herbicide
- fossil fuels
- green manures
- composting
composting
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Fact 1: Hydrogen bonds cause water to expand when it freezes. Fact 2: Water is everywhere H20. Given the two facts above, what causes H20 to expand when frozen?
OPTIONS:
- evaporation
- vaporization
- hydrogen bonds
- helium bonds
- mysterious forces
- nitrogen bonds
- Physical weathering
- precipitation
hydrogen bonds
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