fronts home work section: name: date: l and d represent … · fronts home work section: name:...

Fronts Home Work Section:

Name: Date:

1. Base your answer(s) to the following question(s) on the weather map below and on your knowledge of Earthscience. The map shows a low-pressure system with two fronts extending from its center (L). Points A, B, C,and D represent locations on Earth’s surface. Two different air masses are labeled.

Which cross section best represents the frontal boundary (fb) and general pattern of air movements betweenlocations C and D?

A. B.

C. D.

2. Which locations are most likely experiencing precipitation?

A. A and B B. B and C C. C and D D. D and B

3. Which atmospheric conditions describe the air mass that is influencing weather conditions at location C?

A. cool and dry B. cool and moist C. warm and dry D. warm and moist

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4. Earth’s surface winds generally blow from regions of higher

A. air temperature toward regions of lower air temperature

B. air pressure toward regions of lower air pressure

C. latitudes toward regions of lower latitudes

D. elevations toward regions of lower elevations

5. Base your answer(s) to the following question(s) on the weather map below, which represents a low-pressure systemover New York State. The L on the map represents the center of the low-pressure system. Two fronts extend fromthe center of the low, and are labeled front 1 and front 2. Cloud cover has been omitted from the station models.

Which map best represents the type of fronts and direction of movement of these fronts in relation to thelow-pressure center?

A. B.

C. D.

Section: page 2 Fronts Home Work

6. Base your answer to the following question on the two map below. Map 2 shows the location of a low-pressure

system . An occluded front extends from the center of the low-pressure system (L) to point A. Lines AB and AC

are two other frontal boundaries. Two air masses are shown. The storm system later moved toward New York

State and produced an ice storm.

On map 2, draw weather front symbols on the correct sides of both line AB and line AC to show the most

probable type and direction of movement of each front.


7. The map below shows surface air temperatures, in degrees Fahrenheit, reported by weather stations in thenorth-central United States. Letter X represents an air mass moving in the direction shown by the arrow. A linemarks a frontal boundary advancing in a southeasterly direction.

Which weather-map symbols best represent air-mass X and the frontal boundary shown on the map?

A. B. C. D.


8. Base your answer(s) to the following question(s) on the United States map below, which shows recorded

temperatures in degrees Fahrenheit for October 2, 2004. The 60◦F isotherm has been drawn on the map.

Identify the two-letter weather map symbol for the dry, cold air mass over North Dakota.

9. On the map above, draw the 70◦F isotherm. Extend the isotherm to the edges of the continent.


Base your answer to the following question on the United States map below, which shows recorded temperatures in degrees Fahrenheit for October 2, 2004. The 60� F isotherm has been drawn on the map. !

8.!

8. Base your answer(s) to the following question(s) on the United States map below, which shows recorded

temperatures in degrees Fahrenheit for October 2, 2004. The 60◦F isotherm has been drawn on the map.

Identify the two-letter weather map symbol for the dry, cold air mass over North Dakota.

9. On the map above, draw the 70◦F isotherm. Extend the isotherm to the edges of the continent.


10. Base your answer(s) to the following question(s) on the weather map below, which shows a low-pressure systemover the eastern United States. Letters A through D represent weather stations.

Surface winds within this low-pressure system most likely are flowing

A. toward the center in a clockwise pattern B. toward the center in a counterclockwise pattern

C. away from the center in a clockwise pattern D. away from the center in a counterclockwise pattern


11. Base your answer(s) to the following question(s) on the weather map below, which shows a high-pressure center(H) and a low-pressure center (L), with two fronts extending from the low-pressure center. Points X and Y arelocations on the map connected by a reference line.

Which map best shows the most probable areas of precipitation associated with these weather systems?

A. B.

C. D.


Base your answers to the following questions on the weather map below, which shows a high-pressure center (H) and a low-pressure center (L), with two fronts extending from the low-pressure center. Points X and Y are locations on the map connected by a reference line.! !

11.!



A. B.

C. D.




A. B.

C. D.




A. B.

C. D.




A. B.

C. D.


12. Which cross section best represents the fronts and air movements in the lower atmosphere along line XY?

A.

B.

C.

D.

13. Which type of front is located between Buffalo and Detroit?

A. stationary B. warm C. occluded D. cold



A.

B.

C.

D.





A.

B.

C.

D.





A.

B.

C.

D.




14. Base your answer(s) to the following question(s) on the weather map provided below. The isobars show airpressures, in millibars. Points A and B indicate locations on the map.

Describe the evidence shown on the map that indicates strong winds were blowing between Miles City and Pierre.


14.$$

15. Calculate the pressure gradient along a straight line between point B and point B on the map. Label your answerwith the correct units.


16. On the weather map below, place an X centered on the geographic region that was most likely the source of the

mT air mass.


17. Base your answer(s) to the following question(s) on the weather map below. The weather map shows a low-

pressure system in New York State during July. The L represents the center of the low-pressure system. Two fronts

extend from the center of the low. Line XY on the map is a reference line.

The cross section below shows a side view of the area along line XY on the map. On lines 1 and 2 in the cross

section, place the appropriate two-letter air-mass symbols to identify the most likely type of air mass at each of

these locations.


18.

The forecast for one city located on the map is given below:

“In the next hour, skies will become cloud covered. Heavy rains are expected with

possible lightning and thunder. Temperatures will become much cooler.”

State the name of the city for which this forecast was given.

19. The cross section below shows a sea breeze blowing from the ocean toward the land. The air pressure at the land

surface is 1013 millibars.

The air pressure at the ocean surface a few miles from the shore is most likely

A. 994mb B. 1005mb C. 1013mb D. 1017mb


18.

The forecast for one city located on the map is given below:

“In the next hour, skies will become cloud covered. Heavy rains are expected with

possible lightning and thunder. Temperatures will become much cooler.”

State the name of the city for which this forecast was given.

19. The cross section below shows a sea breeze blowing from the ocean toward the land. The air pressure at the land

surface is 1013 millibars.

The air pressure at the ocean surface a few miles from the shore is most likely

A. 994mb B. 1005mb C. 1013mb D. 1017mb


Base your answers to the following questions on the weather map below. The weather map shows a low- pressure system in New York State during July. The L represents the center of the low-pressure system. Two fronts extend from the center of the low. Line XY on the map is a reference line.!

17.!

18.!

20. The cross section below shows a house on the shore of Lake Ontario in August.

Under which conditions would the wind shown in the cross section most likely occur?

A. at 2AM, when the air over land is 70◦F and the air over the lake is 80◦F

B. at 6AM, when the air over land is 70◦F and the air over the lake is 70◦F

C. at 2 PM, when the air over land is 80◦F and the air over the lake is 70◦F

D. at 10 PM, when the air over land is 70◦F and the air over the lake is 72◦F

21. The arrows labeled A through D on the map below show the general paths of abandoned boats that have floatedacross the Atlantic Ocean.

Which sequence of ocean currents was responsible for the movement of these boats?

A. South Equatorial ! Gulf Stream ! Labrador ! Benguela

B. South Equatorial ! Australia ! West Wind Drift ! Peru

C. North Equatorial ! Koroshio ! North Pacific ! California

D. North Equatorial ! Gulf Stream ! North Atlantic ! Canaries


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