1. 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

2. 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

3. 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

4. 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

5. 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)

6. 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.

8. 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

10. 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.