water that falls to Earth's surface as rain, snow, sleet, or hail

the amount of sun being blocked by clouds

a weather instrument that measures rainfall

the condition of the atmosphere at a place for a short period of time

all the liquid water and ice on the Earth's surface, liquid water in the ground, and water vapor in the atmosphere

how fast the wind is moving according to observations, instruments, and the Beaufort wind scale

on a weather map, an area where the air pressure is lower than it is in surrounding areas

areas or bands around the Earth's equator, that experience year-round warm temperatures with sometimes wet, or dry, or somewhere in between, weather conditions

a front that forms when a cold front overtakes a warm front, capturing the warm air mass between two cold air masses and generally produces light rain or other precipitation

the general weather of an area over a long period of time (years)

the process of water changing from liquid to gas

an area in the lower atmosphere where the air is moving around a high or low area

a weather instrument used to measure relative humidity

the leading edge of a moving mass of cooler air-generally brings violent storms followed by cooler weather

symbols used on a weather map to represent particular weather conditions

a scientist who studies climates of different areas of the Earth

a weather instrument that measures wind speed

the lowest layer of the Earth's atmosphere in which all of our weather happens

areas or bands of cold and dry around the North and South poles of Earth

the gaseous state of water

the place where two air masses of different temperatures and pressures meet

a boundary between two air masses in which the masses are not moving-generally brings many days of continuous precipitation

the change of water from one state to another as it moves between Earth's surface and the atmosphere

moving air

a weather instrument that measures wind direction

loss of water through a plant's green leaves during photosynthesis

the process of a gas changing back into a liquid

a scientist who studies the weather and weather patterns

the average speed of the particles moving in a substance; how hot or cold the air is

water that collects underground through cracks and spaces in rocks

the air that surrounds the Earth like a blanket

areas between Polar and Tropical climates of the Earth that experience moderate temperatures that change with the seasons, with varying amounts of precipitation from place to place and from season to season

a prediction of what the weather will be, based on weather data

a collection of substances, such as water

on a weather map, an area where the air pressure is higher than it is in surrounding areas

a map or chart showing the principal meteorological elements at a given hour and over an extended region

the leading edge of a moving mass of warmer air-it moves over the top of cold air masses-generally brings rain and showers followed by warmer, more humid air

the amount of water vapor in the air

an area of underground porous rock that holds or accumulates water

a tool used to measure temperature

water that flows along the Earth's surface

a weather instrument that measures air pressure