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48 Cards in this Set
- Front
- Back
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How much of the earth's surface is covered with water? |
three fourths |
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What are clouds made of? |
mostly water and air |
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What kind of cloud is large and puffy? |
Cumulus |
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What kind of cloud is feathery and light? |
Cirrus |
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What kind of cloud looks like a blanket? |
Stratus |
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What kind of cloud sometimes forms thunderheads? |
Cumulus |
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What kind of cloud is called fog when it is very close to the earth?
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Stratus
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What kind of cloud is made of air and ice crystals? |
Cirrus |
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What kind of cloud is often a sign of an approaching storm? |
Cirrus |
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What kind of cloud usually brings light rain and snow? |
Stratus |
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What kind of cloud usually appears during fair weather? |
Cumulus |
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What does the height of a cloud depend on? |
the condition of the atmosphere |
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What do all living things contain? |
water |
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the smallest part of a substance that still has all the qualities of that substance |
molecule |
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a particle which makes up molecules; the smallest part of matter |
atom |
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a gas which is combined with oxygen in water |
hydrogen |
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a gas which green plants give off into the air during photosynthesis |
oxygen |
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What happens when 2 atoms of hydrogen and one atom of oxygen join together? |
they make a molecule of water |
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Water has 3 states, what are they? |
solid, liquid, or a gas |
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Water in its state of gas? |
water vapor |
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true or false? a liquid takes the shape of any container it is put into? |
true |
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when matter has no shape of its own but it takes up a certain amount of space it is a ______? |
liquid |
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Solids do not change shape easily, they are very _________? |
dense |
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to move rapidly back and forth |
vibrate |
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the temperature at which a solid changes to a liquid is its _____________? |
melting point |
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what is the melting of water> |
32 degrees F |
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the temperature at which at which a liquid changes to a gas is its ___________? |
boiling point |
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to become larger |
expand |
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to become smaller |
contract |
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the temperature at which liquid water changes to a solid |
32 degrees F |
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a push or pull of an object |
force |
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the force which draws things down toward the center of the earth |
gravity |
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potential energy is __________ energy |
stored |
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the air surrounding the earth |
atmosphere |
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the gas that makes up most of the air |
nitrogen |
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a gas which green plants absorb from the air during photosynthesis |
carbon dioxide |
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how much does a cubic foot of air weigh? |
about one ounce |
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the measurement of force exerted against an object |
pressure |
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allowing light to pass through |
transparent |
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why does warm air rise? |
it is less dense |
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List 3 helpful things the wind does? |
plants depend on wind to pollinate the wind lets us know of changes in weather and the winds help to prevent flooding |
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Why is it that not every place on earth receives the same amount of heat? |
because the earth is tilted |
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List 3 harmful effects of the wind. |
tornadoes, spread forest fires , and hurricanes |
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the movement of water from the earth to the air and back again |
water cycle |
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the amount of water vapor in the air |
humidity |
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what is able to hold more water vapor than cool air? |
warm air |
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the amount of water vapor in the air in relation to the temperature |
relative humidity |
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the process by which liquid becomes water vapor |
evaporation |
