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| What are materials that flow and have no definite shape of their own? |
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| force on a surface divided by the area of that surface |
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| Anything that exerts pressure is capable of producing _______ and doing ________. |
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| What is the formula for pressure? |
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Definition
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| What kind of quantity is pressure? |
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| What is the unit for pressure? |
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| What is a Pascal equal to? |
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| What is the standard atmospheric pressure? |
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| What pressure does the best vacuum have? |
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Definition
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| What is the Ideal Gas Law formula? |
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| What does one mole represent? |
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Definition
| Avogadro's number of particles |
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| What is Avogadro's number? |
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Definition
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| When heated, all forms of matter, generally become less dense and expand to fill more space. |
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Definition
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| When air near the floor is warmed, gravity pulls the denser, colder air near the ceiling down and pushes the warmer air upward. |
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Definition
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| What happens when water is rated from 0 to 4 degrees Celcius? |
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Definition
| instead of expanding, it contracts as the forces between particles increase and the ice crystals collapse |
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Term
| Why does ice float on water? |
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Definition
| the forces between water molecules are very strong, and the crystals that make up ice have a very open structure |
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Term
| What is the fourth state of matter? |
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Definition
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Definition
| collisions between particles become violent enough to tear electrons off atoms, producing positively charged ions |
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| What does plasma make up? |
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Definition
| most of the matter in the universe- all stars, lightening, and all hydrogen in outer space because its electrons have been stripped away |
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Term
| What is the difference between gas and plasma? |
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Definition
| plasma can conduct electricity |
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| like particles stick together, and this causes service tension which is the tendency of the surface of a liquid to contract to the smallest possible area |
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| electromagnetic attractive forces that act between particles of different substances |
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| any change in pressure applied at any point on a confined fluid is transmitted undiminished throughout the fluid |
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Definition
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| an object immersed in a fluid has an upward force on it that is equal to the weight of the fluid displaced by the object. The force doesn't depend on the weight of the object, only on weight of displaced fluid |
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Definition
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| increase in pressure with increase in depth creates this upward force |
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Definition
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| as the velocity of a fluid increases, the pressure exerted by that fluid decreases |
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Definition
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| flow of fluids around objects |
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Definition
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Term
| Objects require less energy to do what? |
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Definition
| move through a smooth, streamlined flow |
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Term
| When a solid is heated, the KE of particles increase, and they vibrate rapidly and move far apart, weakening the attractive forces between the particles and this causes their separation to increase and steel highway bridges to allow for the expansion of parts in summer heat |
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Definition
| thermal expansion of solids |
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Term
| used in thermostats, usually brass and iron welded together and when heated, brass expands more than iron, so brass becomes longer and strip bends with brass and as it cools bends wit iron |
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