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16 Cards in this Set
- Front
- Back
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density
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how much of a substance is in a unit of space
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water vapor
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invisible area where water stops being a liquid and starts being a gas
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steam
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cooling water vapor made up of tiny water droplets that have condensed
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evaporation
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the process of water changing into vapor
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atoms
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tiny particles that make up matter
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molecule
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combination of atoms which are bound together
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electrons
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negative parts of an atom (e-)
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protons
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positive parts of an atom (p+)
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neutrons
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neutral parts of an atom that have no positive or negative charge (n0)
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energy levels
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circular paths for electrons around an atom’s nucleus
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polar molecule
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when the ends of a molecule are positively and negatively charged
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cohesion
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the force that causes similar molecules to be attracted to each other holding them together
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adhesion
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the “sticking” force that holds one material to a different material
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surface tension
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occurs when surface molecules in a liquid are held together by strong cohesive forces. The “skin” on the surface of the liquid resists being broken
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buoyancy
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the ability to stay afloat caused by the balancing of forces, such as water pressure pushing up and gravity pulling down on a floating object. There are three types of buoyancy: positive buoyancy – when an object floats, negative buoyancy – when an object sinks, and neutral buoyancy when an object hovers between sinking and floating.
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displace
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movement of water due to an object being placed in the water
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