Air mass Atmosphere Front Isobar Isotherm Forecast Convection   Isobar Forecast Barometer Precipitation Weather Climate  Air mass Front   Isotherm Convection Conduction Radiation Land Breeze Sea Breeze Current

Isobar- Lines connecting points of equal pressure Dew Point- the temperature at which relative humidity reaches 100% and dew forms Forecast- prediction of future weather, based on current and past conditions Barometer- instrument used to measure air pressure Precipitation- water or ice that condenses in the air and falls to the ground

Atmosphere - Earth’s air, which is made of a thin layer of gases, solids and liquids; forms a protective layer around the planet; broken in to five layers. Relative humidity- the amount of moisture actually in the air compared the maximum amount that it can hold. (given in percentage) Weather- the behavior of the atmosphere at a particular place and time Climate- the pattern of weather in an area

Air mass- a large mass of air that has the properties of the surface over which it formed Front- the boundary between two different air masses Isotherm- line connecting points of equal temperature Jet Stream- narrow band of very fast wind in the upper tropo or lower stratospheres. Wind- lateral movement of Earth’s atmosphere from high pressure to low pressure

fog – cloud that collects at the surface of the Earth, usually when lower levels are warmer than the air Ozone – three atoms of Oxygen; formed in the ozone layer (located in the stratosphere); protects life from UV rays Temperature – degree of intensity of heat of an object; measure of the average kinetic energy an object has (can be measured) Heat –energy a substance has – is transferred by conduction, convection or radiation (comparison)

Greenhouse Effect The rise in temperature that the Earth experiences because certain gases in the atmosphere (water vapor, carbon dioxide, nitrous oxide, and methane, for example) trap energy from the sun. Without these gases, heat would escape back into space and Earth’s average temperature would be about 60ºF colder.

http://earthguide.ucsd.edu/earthguide/diagrams/greenhouse/

Global Warming Refers to an average increase in the Earth's temperature, which in turn causes changes in climate. A warmer Earth may lead to changes in rainfall patterns, a rise in sea level, and a wide range of impacts on plants, wildlife, and humans. When scientists talk about the issue of climate change, their concern is about global warming caused by human activities

Sea-level has risen about 130 metrers (400 ft) since the peak of the last ice age about 18,000 years ago. Most of the rise occurred before 6,000 years ago. From 3,000 years ago to the start of the 19th century sea level was almost constant, rising at 0.1 to 0.2 mm/yr. The rise in sea level is determined by thermal expansion and ice melting.