Science 9 Review for Severe Weather

1. A funnel shape cloud that touches the earth surface________. tornado

2. The number of tornados that occur in the USA each year is about 800 1000 80 300

3. Mountains have ______________ climates because there is less air molecules to hold the heat at high elevations warmer More sun colder more rain

4. To be classified as a hurricane, a tropical storm must have winds of at least _____________. 139 km/hr. 119 km/hr. 100 km/hr. 75 km/hr

6. Elevations and landforms are factors that determine an area’s _____. topography. biology atmosphere Watershed

7. The eye of the hurricane is __________ calm

9. How does lake effect snow occur? Cold air blows over a large lake then over land. It picks up the moist air and creates excess snow for coastal cities.

10. When a warm air mass and a cold air mass meet and there is no movement, the result is __________ producing what _______________type of weather. A stationary front Rainy over an extended period of time

11. A rapidly moving cold air mass runs into a slow moving warm air mass, resulting in _________ and producing ________ type of weather. Occluded front Stormy, rainy

13. A landform that has a high elevation and a more or less level surface plateau

14. Plateaus, plains and mountains are all part of which of the earth’s spheres? Lithosphere/geosphere

15. A long lasting storm that begins over a warm surface of the ocean and has winds of 74 mph or smaller is a _____________ Tropical storm

16. Storms that form within cumulonimbus clouds and produce rain and lightning are called ________. thunderstorms.

17. One of the best places to seek protection during a tornado is __________ In the attic Beside a fridge or stove In the garage In the basement

18. People often cover their mouths to avoid lung infections during a _______________ Dust or sand storm

19. Which states are part of tornado alley? Kansas, Texas, Oklahoma, Nebraska

19. ______________ are lines that indicate cities anywhere on the line will have the same air pressure or temperature or humidity. ISOBARS

20. The most dangerous part of a hurricane is called ___________ Storm Surge

21. Thunderstorms from within High cirrocumulus clouds Low cirrus clouds Large cumulonimbus clouds High altocumulus clouds

22. A front is a ___________ between air masses. boundary

23. The clouds that occur at the highest altitude are ______________ cirrus

24. Why does warm air rise? It is less dense

25. The direction in which the wind moves is influenced by _____________ The pressure gradiant Earth’s rotation Neither a or b Both a and b

26. In a high pressure area are the air molecules close together or far apart? Molecules are close together and close to the earth’s surface.

26. Where is a maritime tropical air mass formed? Over warm water

Lattitude Elevation Season change landforms 27. What are some of the factors that affect climate? Lattitude Elevation Season change landforms

28. Place where a warm and cold air mass meet is called a __________________ front

29. Elevations and landforms are factors that determine an areas __________ topography

30. A _____________ means conditions are right for severe weather and a __________ means severe weather has been spotted. Watch Warning

Wind changes direction as there is an increase in altitude 30. What is wind sheer? Wind changes direction as there is an increase in altitude

31. What is a rain shadow? The leeward side of a mountain does not get the wind or rain because the mountain blocks it and sends it aloft.

32. At a __________ fair weather occurs because of a sinking motion of the air so clouds can not form? Warm Front

33. The temperature at which air is saturated and condensation occurs is called ________ Dew point

34. A series of waves caused by an earthquake is called a __________________ tsunami

35. A type of precipitation that is created when snow passes through warm air, melts and refreezes is called __________________ sleet