| A | B | 
|---|
| What causes weather? | The uneven heating of Earth's ground and atmosphere | 
| What is meteorology? | The study of the Earth's air, especially the movements and events that cause weather | 
| Who studies meteorology? | A meteorologist | 
| What is temperature? | The measurement of the amount of heat energy in the atmosphere | 
| What tool do meteorologists use to measure air temperature? | A thermometer | 
| What word do we use to describe the amount of water vapor that is in the air? | Humidity | 
| What tool do scientists use to measure the amount of water vapor in the air? | A hygrometer | 
| What is a front? | The boundary between air masses of different temperature and humidity | 
| What is an air mass? | A very large body of air that has about the same temperature and humidity through it | 
| Describe a cold front | When cold air pushes into warm air causing the warm air to rise quickly; this front produces thunderstorms, bringing fair, cooler weather. | 
| Describe a warm front | When a warm air mass slides above a cold air mass producing light rain or snow, lasting for several days; when the front passes we will have warmer, more humid weather. | 
| What tool do scientists use to measure the amount of rainfall? | A rain gauge | 
| Name four different types of precipitation. | Rain, snow, sleet, hail |