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28 Cards in this Set
- Front
- Back
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________ of the earth is covered with water
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three-fourths
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_______ is a very high, featherlike cloud; means curly; often means that a storm is on its way
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cirrus
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______ is a large, puffy cloud with a flat bottom
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cumulus
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_________ is a thick, dark, heavy cumulus cloud
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thunderhead
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______ is a low thick layer of clouds; frequently brings drizzling rain or fine snow
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stratus
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____ is a stratus cloud close to the earth's surface
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fog
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The human body is about _____ water
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65%
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_______ is anything that takes up space and has weight
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matter
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A ________ is the smallest piece of a substance that still has all the qualities of that substance
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molecule
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Atoms are particles which make up __________
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molecules
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Two gases found in the air are __________ and _________
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hydrogen and oxygen
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A molecule of _________ is made up of hydrogen and oxygen
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water
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The three states of matter are ________, _________, and ________
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solid, liquid and gas
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________ is the only substance that exists naturally in all three states of matter
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water
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Water in liquid state is ______; water in solid state is _______; water in gas state is _______ _______ or _______
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water; ice; water vapor or steam
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______ is matter that has a definite shape and takes up a certain amount of space; its molecules are packed close together; they vibrate ( move rapidly back and forth)
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solid
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______ is matter that takes up a certain amount of space but has no shape of its own
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liquid
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______ is matter that has no shape and does not fill up a certain amount of space; its molecules are far apart and are the fastest moving molecules
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gas
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The ______ _______ is the temperature at which a solid changes to a liquid
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melting point
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The melting point of water is ____ degrees; the boiling point of water is ______ degrees
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32; 212
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Most substances expand, or get larger, when they are __________
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heated
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Most substances contract, or get smaller, when they become _________
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colder
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Water ________ just before it freezes
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expands
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The freezing point is the temperature at which a liquid changes to a ________
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solid
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The freezing point of water is _____ degrees, this is when water changes to a solid
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32
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What causes molecules to move more rapidly
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heat
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Because water has a high ______ _______, objects will float on it.
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surface tension
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Identify as solid, liquid, gas or not matter: air, ice, patriotism, milk, tree trunk, water vapor, your soul, steam, hydrogen, paper
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air- gas, milk-liquid, ice-solid, patriotism-not matter, tree trunk-solid, water vapor-gas, your soul- not matter, steam-gas, hydrogen-gas, paper-solid
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