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energy
the ability to do work
kinetic energy
the energy an object has due to its motion
potential energy
stored energy
gravitational potential energy
potential energy that depends on the height of an object
elastic potential energy
the energy of stretched or compressed objects
chemical potential energy
potential energy stored in chemical bonds
mechanical energy
the energy associated with the motion and position of everyday objects
electrical energy
energy of electric charges
chemical energy
energy stored in chemical bonds
nuclear energy
energy stored in the nucleus of an atom
electromagnetic energy
a form of energy that travels through space as waves
thermal energy
heat energy
conduction
direct transfer of heat from one substance to another substance that it is touching.
convection
transfer of thermal energy by the circulation or movement of a liquid or gas
radiation
transfer of energy by electromagnetic waves
law of conservation of energy
energy cannot be created or destroyed
temperature
measure of how hot or cold something is
Celsius scale
temperature scale on which water freezes at 0 degrees and boils at 100 degrees
Fahrenheit scale
temperature scale on which water freezes at 32 degrees and boils at 212 degrees
conductor
material that conducts heat well
insulator
material that does not conduct heat well
organism
a living thing
climate
average weather conditions in an area over a long period of time
evaporation
liquid to gas
transpiration
loss of water from a plant through its leaves
condensation
gas to liquid
precipitation
rain, snow, sleet, or hail that falls to the ground
surface runoff
water that flows over land until it reaches lakes, rivers, or other areas
groundwater
water held underground in the soil or in pores and crevices in rock
cirrus
wispy, feathery clouds
cumulus
clouds that look like fluffy, rounded piles of cotton
stratus
clouds that form in flat layers
rain gauge
measures the amount of rain fall
anemometer
measures wind speed
barometer
measures air pressure
wind vane
measures wind direction
hygrometer
measures humidity
psychrometer
measures relative humidity
thermometer
measures temperature
local winds
winds that blow over short distances
global winds
winds that blow over long distances
sea breeze
movement of air from sea to land during the day
land breeze
movement of air from land to sea at night
Coriolis effect
the effect of Earth's rotation on the direction of winds and currents.
latitude
distance north or south of the equator
longitude
distance east or west of the prime meridian
hurricane
severe storm that forms over tropical oceans
tornado
a rapidly whirling, funnel-shaped cloud that reaches down to touch Earth's surface
lightning
electric discharge from cloud to cloud or from cloud to earth
warm front
the front of an advancing mass of warmer air
cold front
a front where cold air moves in under a warm air mass
stationary front
when a warm air mass and a cold air mass meet and no movement occurs
occluded front
a front where a warm air mass is caught between two colder air masses and brings cool temperatures and large amounts of rain and snow
high pressure
a mass of sinking cool air that usually bring fair weather.
low pressure
a mass of rising warm air that usually bring wet, stormy weather