Answer the following question given this paragraph: You know that friction produces heat. That's why rubbing your hands together makes them warmer. But do you know why the rubbing produces heat? Friction causes the molecules on rubbing surfaces to move faster, so they have more heat energy. Heat from friction can be useful. It not only warms your hands. It also lets you light a match (see Figure below ). On the other hand, heat from friction can be a problem inside a car engine. It can cause the car to overheat. To reduce friction, oil is added to the engine. Oil coats the surfaces of moving parts and makes them slippery so there is less friction. Q: Friction causes the molecules on rubbing surfaces to move faster, which produces what? A:
OPTIONS:
- life
- precipitation
- cold
- heat
heat
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Answer the following question given this paragraph: Q: Some microorganisms can digest cellulose, breaking it down into what? A:
OPTIONS:
- gluclose polymers
- fructose polymers
- fructose monomers
- glucose monomers
glucose monomers
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Answer the following question given this paragraph: Eris is the largest known dwarf planet in the solar system. It is 27 percent larger than Pluto ( Figure above ). Like Pluto and Makemake, Eris is in the Kuiper belt. But Eris is about three times farther from the Sun than Pluto. Because of its distance, Eris was not discovered until 2005. Early on, it was thought that Eris might be the tenth planet. Its discovery helped astronomers realize that they needed a new definition of "planet. " Eris has a small moon that orbits Eris once about every 16 days. Q: What large dwarf planet in our solar system was only discovered in 2005? A:
OPTIONS:
- artemis
- Cerus
- zeus
- eris
eris
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Answer the following question given this paragraph: Q: Macrophages and dendritic cells are types of what" A:
OPTIONS:
- amoena cells
- supercapacitor cells
- mast cells
- phagocytic cells
phagocytic cells
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