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science 002


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
Popular Science sets




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