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science 002
gace002
| Question | Answer |
|---|---|
| What is a wheel with a line around it, a line could be a rope, cord, or chain. It changes the direction of force. | Pulley |
| A bar that pivots on a fixed point | lever |
| The use of force to move an object over a distance | work |
| a machine with few or no moving parts to which you apply just one force | simple machine |
| the gravitational force on an object | weight |
| force that resists the motion of objects, relative to each other, when the objects are touching | friction |
| force that pulls things toward earth | gravity |
| a force that acts between all masses and causes them to attract one another | gravitation |
| property of matter that keeps it moving in a straight line. keeps unmoving matter at rest move force is needed to accelerate a large mass then to accelerate a small mass | inertia |
| process by which a liquid changes into a gas. heat changes water from a liquid to a gas. | evaporation |
| process by which a gas changes to a liquid. when water vapor cools down | condensation |
| puffy indicates fair weather rain can develop as it grows | cumulus clouds |
| form low in the atmosphere. cover the sky. moderate (not heavy) rainfall or snowfall. | stratus clouds |
| form high in the atmosphere. made mostly of ice crystals. | cirrus clouds |
| water that falls to the atmosphere. light drizzle-stratus. rain and other forms of precipitation fall from cumulonimbus clouds. | precipitation |
| study of weather. forecasts predications about future weather. tools-thermometer (air temp), barometer (air pressure)anemometer (wind speed), hygrometer (humidity) | meteorology |
| a large body of air that has the same temp and humidity throughout. four types in US- continental polar(cool, dry weather) continental tropical (hot dry weather) maritime poplar (cold, humid) maritime tropical( warm, humid) | air mass |
| border where 2 air masses meet. cold front forms where a cold air mass moves under a warm air mass. heavy rain, thunderstorms, or snow. moves quickly | front |
| form where an warm air mass moves over a cold air mass. stratus clouds are formed. can produce rain or snow that can last for hours. | warm front |
| back and forth movement | vibration |
| loudness of a sound | volume |
| volume of a sound is measured in | decibels |
| materials that allows SOME light to pass through | translucent |
| allows MOST of the light that hits it to pass through | transparent |
| DON'T ALLOW any light to pass through | opaque |
| a living thing that feeds on wastes and the other remains of died plants and animals. breaks down wastes into nutrients. plants absorb nutrients from soil> animals eat plants and gets nutrients> | decomposers |
| an animal that eats ONLY plants | herbivore |
| an animal that eats ONLY other animals | carnivore |
| an animal that eats BOTH plants and animals | omnivore |
| any living thing that can make it's own food | producers |
| an animal that eats their own food | consumers |
| a group made up of the same kind of individuals living in the same ecosystem | population |
| all the population that live in the same place | community |
| formed by all living and nonliving things in an area. can be as small as the area under a rock. can be as large as a forest. | ecosystem |
| all the living and nonliving things that surround you. living-people, animals, plants. nonliving-water, air, soil, and weather. | environment |
| a post with threads wrapped around it. threads are inclined plane that curls around a post. | screw |
| two inclined planes placed back to back. change the direction of a force. used to cut and splint things. used to lift and push things. | wedge |
| how high or low sound is | pitch |
| number of vibrations per second. sound with a high frequency has a high pitch. | frequency |
Created by:
mbrannen
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