| A | B |
|---|
| ULTRAVIOLET RADIATION | A form of energy with wavelengths that are shorter than visible light. |
| GREENHOUSE EFFECT | The process by which heat is trapped in the atmosphere by water vapor, carbon dioxide, methane, and other gases that form a "blanket" around Earth. |
| TEMPERATURE | The average amount of energy of motion in the molecule of a substance. |
| THERMOMETER | An instrument used to measure temperature, consisting of a thin, glass tube with a bulb on one end that contains a liquid (usually mercury or alcohol). |
| CONDUCTION | The transfer of heat from one substance to another by direct contact of particles of matter. |
| CONVECTION | The transfer of heat by movements of a fluid. |
| WIND | The horizontal movement of air from an area of high pressure to an area of lower pressure. |
| ANEMOMETER | An instrument used to measure wind speed. |
| SEA BREEZE | The flow of air from an ocean or lake to the land. |
| LAND BREEZE | The flow of air from land to a body of water. |
| MONSOON | Sea and land breezes over a large region that change direction with the seasons. |
| GLOBAL WINDS | Winds that blow steadily from specific directions over long distances. |
| CORIOLIS EFFECT | The way Earth's rotation makes winds in the Northern Hemisphere curve to the right and winds in the Southern Hemisphere curve to the left. |
| JET STREAM | Bands of high-speed winds about 20 kilometers above Earth's surface. |
| EVAPORATION | The process by which molecules at the surface of a liquid, such as water, absorb enough energy to change to a gaseous state, such as water vapor. |
| HUMIDITY | A measure of the amount of water vapor in the air. |
| RELATIVE HUMIDITY | The percentage of water vapor in the air compared to the maximum amount the air can hold at that temperature. |
| PSYCHROMETER | An instrument used to measure relative humidity, consisting of a wet-bulb thermometer and a dry-bulb thermometer. |
| CONDENSATION | The process by which a gas, such as water vapor, changes to a liquid, such as water. |
| DEW POINT | The temperature at which condensation begins. |
| ATMOSPHERE | gaseous envleope that surrounds the earth |
| WEATHER | The state of the atmosphere at this moment including wind, cloud cover, temperature, barometric pressure, and moisture |
| SPECIFIC HEAT CAPACITY | the amount of heat required to raise the temperature of a substance 1 degree |
| HIGH SPECIFIC HEAT | The ratio of the amount of heat required to raise the temperature of a unit mass of a substance by one unit of temperature to the amount of heat required to raise the temperature of a similar mass of a reference material, usually water, by the same amount. |
| CORIOLIS | appearing as a deflection to the right in the Northern Hemisphere and a deflection to the left in the Southern Hemisphere. |
| ISOBARS | a line drawn on a weather map or chart that connects points at which the barometric pressure is the same. |
| THERMOBARS | a line drawn on a weather map or chart that connects points at which the temperature is the same. |
| OZONE | a form of oxygen, O3, with a peculiar odor suggesting that of weak chlorine. In the upper atmosphere, it absorbs ultraviolet rays, thereby preventing them from reaching the surface of the earth. |
| DENSITY | The mass per unit volume of a substance under specified conditions of pressure and temperature. |
| FRONTS | The interface between air masses of different temperatures or densities. |
| AIR MASSES | A large body of air with relatively similar temperature, pressure, and moisture. |
