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Science Ch. 20
Earth science chapter 20 test on Feb. 12
| Question | Answer |
|---|---|
| Why is weather prediction important? | weather prediction helps people PLAN their ACTIVITIES and can SAVE Ives. This is important for BIBLICAL reasons like LOVING our NEIGHBOR. PEOPLE are worth SAVING because they bear GOD’S image |
| describe the properties of an air mass | an air mass is a BROAD body of air in the TROPOSPHERE having similar TEMPERATURES and HUMIDITY throughout. Air masses can be several KILOMETERS thick. |
| how does a source region affect a mass of air moving slowly over it? | as an air mass moves over a LAND area, it takes on the TEMPERATURE and HUMIDITY characteristics of a source region |
| Name, give the symbol for, describe and identify a source region of the five usual kinds of air masses | A. Continental arctic (cA)- cold and dry, Antarctica, Siberia B. Continental Polar (cP)- cool and dry, Russia C. Continental Tropical (cT)- warm and dry, Mexico, Africa,South Ameria |
| Finish naming, giving the symbols for, and identifying the source region of the five usual kinds of air masses | D. Maritime Polar (mP) - cool and humid, northern Pacific, and Atlantic Oceans E. Maritime Tropical (mT)- warm and humid, Caribbean, and Indian Oceans |
| lighting | is an electrical discharge either between clouds or between a cloud and the ground |
| tornado | is a narrow rapidly spinning mass of air extending downward from a cumulonimbus cloud |
| (true or false) Weather maps are not really useful to meteorologists for predictions because by the time they get the maps the data is old news | false |
| What happens when two air masses meet | when two air masses meet, they do not MIX so the WARMER air mass tends to RISE up over the COOLER, forming a FRONT. Fronts are often the LOCATION of PRECIPITATION and CHANGES in weather. |
| What changes occur when a warm air mass over takes a cold air mass | When a warm air mass overtakes a cold air mass, COOL temperatures suddenly RISE, pressure slowly DECREASES and then remains steady WINDS often shift from the SOUTHEASTERLY to the SOUTHWESTERLY direction and the DEW point slowly rises then is steady |
| (True of False) rapidly rising barometric pressure and cooling temperatures dictate a cold front has passed through your area | true |
| (true or false) the enhanced Fjita - Pearson and Saffir - Simpson scales classify tornadoes and hurricanes by the amount of damage they do, not by their sizes | true |
| Describe a tornado compared to a hurricane | Tornadoes are small intense rotating storms. Most form over land. Have strongest surface winds and cause damage by wind speed and updraft. |
| Describe a hurricane compared to a tornado | hurricanes are cyclonic storms. Form only over tropical and subtropical oceans. Damage caused by sustained wind speeds, heavy precipitation, and storm surges |
| list three sources of weather data used by the National Weather Service to develop weather forcasts | a. Stations B. Airports C. Satellites |
| what precaution should your family take when driving long distance in snow | your family should dress WARMLY, take high energy SNACKS and WATER, and have extra BLANKETS in case your vehicle gets stranded. |
| which of the storms discussed in this chapter is the most common | thunder storms |
| where do most of the tornadoes occur in the world | In the SOUTHERN and CENTAL regions of the United States, called TORNADO ALLEY |
| what three things cause a hurricane’s winds and energy to diminish over landmasses | trees and IRREGULARITIES of land contour (friction) RESIST the storm’s winds. Less HEAT and less WATER vapor are available, so there is less ENERGY being added to the storm |
| How does the reliability of weather forecasts change as the forecasts period moves further into the future? Explain? | As the forecasts period period becomes more DISTANT. The RELIABILITY of the forecast DECREASES. Many factors affect WEATHER. The FARTHER we look into the future, the less ACCURATELY we can PREDICT the effect of these factors |
| How does the National Weather Service obtain weather data from remote unpopulated locations | The NWS uses AUTOMATED weather stations or weather BUOYS |
| Why is a one-day forecast more reliable than a seven day forecast forecast | the MATHMATICAL weather models are more ACCURATE for one day focast. There are too many VARIABLE factors that work together to AFFECT weather, making long-range forecasts LESS accurate |
| Hurricane | the largest storms of all are cyclonical windstorms that form over tropical or subtropical oceans |
| Tropical storm | When cyclonic storms wind speed reaches 39 mi/hr or more |
| eye | the calm center of a hurricane |
| Storm surge | the higher than normal water level caused by a hurricane |
| list the four types of storms and give two things all of these storms have in common | a. Winter storms B. Thunder storms C. Tornadoes D. Hurricanes Precipitation and winds |
Created by:
Emmalyn Cruse
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