Chapter 8 Review Let’s get an “A” on the Test! Chapter 8 Review • What causes winds? • Winds are caused by differences in air pressure. • What is humidity? • Humidity is a measure of the amount of water vapor in the air. Chapter 8 Review • There are four main types • Cold, warm, stationery, of fronts. What are they? and occluded Describe each. • There are also four main • Evaporation, parts to the water cycle. condensation, What are they? How do precipitation, and they create a cycle? runoff. Chapter 8 Review • Name the five types of precipitation. • What does the suffix nimbus mean? • What does the word cumulus mean? • What does the word cirrus mean? • What does the word strato mean? • Rain, snow, sleet, hail, and freezing rain • Rain • Heap or mass • A curl of hair • Spread out Chapter 8 Review • What is the name for the • Cumulonimbus giant “thunderhead” type of cloud? • What is the name for the • Fog clouds that form at or near the ground? • What is needed to make a cloud? Condensation of water molecules and • Tiny particles on which ______________ the molecules can condense. Chapter 8 Review • The temperature at which condensation begins is called the _____________ • Where do hurricanes typically form? • Dew point • They typically form over areas of warm ocean water. Chapter 8 Review • What causes tornadoes? • Usually they are caused when a warm, humid air mass meets a cool, dry air mass. • Where do most tornadoes occur? • Tornado alley on the Great Plains of the Unites States Chapter 8 Review • What type of clouds are associated with tornadoes? • Cumulonimbus • What is lightning? • Lightning is a sudden spark, or electric discharge between clouds or between clouds and the ground Chapter 8 Review • What is the name for a Scientist who studies the causes of weather? • On a weather map there are often the letters L and H. What do they mean? • What are the lines that connect areas of the same temperature called? • A Meteorologist • Areas of low and high pressure • Isotherms Chapter 8 Review • What are the lines that • Isobars connect areas of the same air pressure called? • Very large tropical • Hurricanes cyclones with high winds are called ____________ • The calm center of a • Eye hurricane is called the __________. Chapter 8 Review • What should you do if you are caught in a snowstorm? • Cover exposed parts of your body and try to stay dry. Only run the car engine if the exhaust pipe is clear of snow. Chapter 8 Review • What should you do if you are in the path of a tornado? • Go into the basement or storm shelter. Stay away from windows and doors to avoid flying debris. If you are outdoors, lie flat in a ditch. Chapter 8 Review • How can you stay safe during a thunderstorm? • Avoid places where lightning may strike such as under a tree. Also avoid objects that can conduct electricity, such as metal objects and bodies of water. If you are outdoors, stay low and avoid trees, fences and poles. Chapter 8 Review • How can you stay safe if you are caught in a hurricane? • Listen to the warnings and evacuate the area when told to do so.