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# I AM ATTACHING PICTURES TO GO ALONG WITH LAB QUESTIONS: 1."Because...

I AM ATTACHING PICTURES TO GO ALONG WITH LAB QUESTIONS:

1."Because all blocks weigh the same, their masses must also be equal. Density is defined as mass per unit volume, so we know the densities of the red and blue blocks are different because their volumes are not the same. Since the volume of a blue block is one-half the volume of a red block, the density of a blue block is ________ the density of a red block."

-HALF

-EQUAL TO

- TWICE

2. Imagine two blocks as shown in Figure 1. The two blocks, with the same size bases, are resting on the horizontal surface of a table or desk. Each block pushes down on the underlying surface with a force (its weight) that is ________ the downward force exerted by the other block."

-EQUAL TO

-DIFFERENT FORM

3.  "By definition, pressure is the amount of force acting on a unit area of surface. Pressure is calculated by dividing the force exerted on a surface by the area over which the force is applied. The blocks weigh the same and their bases have the same area, so the two blocks exert ________ pressure on the underlying surface."

-EQUAL

-UNEQUAL

4."In Figure 2, two pairs of blocks are placed on the table top. The two blue blocks are placed side-by-side so their top surfaces form a continuous horizontal surface. On the same tabletop, two red blocks are placed on their square bases side-by-side. The two red blocks also form a continuous ________ upper surface."

-HORIZONTAL

-SLOPING

5. "In Figure 3, one red block and one blue block are placed side-by-side on the tabletop. While they both exert the same pressure on the underlying surface, the upper surface of the redblock is higher. Viewed from the side, the "stepped" upper surface formed by the blocks slopes downward from the red block to the blue blockand therefore slopes downward from the ________ block."

- LESS DENSE TO MORE DENSE

- MORE DENSE TO LESS DENSE

6. "Next, another red block is stacked on top of the red block and another blue block on the blue block, as shown in Figure 4. This causes the pressure exerted by each stack of blocks on the underlying table or desk surface to ________."

-REMAIN THE SAME

-DOUBLE

7. "At the same time, the pressure exerted on the tabletop by the red stack is ________ to the pressure exerted on the tabletop by the blue stack."

-EQUAL

-NOT EQUAL

8. "With the addition of equal numbers of like-colored blocks to their respective stacks, the slope between their top surfaces becomes ________ steep."

-LESS

-MORE

9. "In the ocean, water of different temperatures existing side-by-side exhibits the same characteristics as the blocks described above. At some depth in the ocean (comparable to the tabletop), pressure exerted by the water is the same horizontally. Above that level, less dense warm water (represented by red blocks) produces a sea surface that is at a ________ elevation than the sea surface above neighboring cold, more dense water (represented by blue blocks)."

-LOWER

-HIGHER

10. "The sea surface slopes downward from ________ water."

-WARM TO COLD

- COLD TO WARM

11. "The highest SST in the Gulf Stream from east of Florida to the Carolinas is ________ °F. Note that the SST values on the maps show the Gulf Stream is warmer than the Shelf Water (between it and the coast) and Sargasso Sea waters to the east."

-71

-74

-78

12. "Ocean water rings, or eddies, form when loops in the meandering Gulf Stream break off to form isolated and persistent rotating bodies of water. Their presence is evidenced by differences between their surface temperatures and the temperature of the waters surrounding them. On the Gulf Stream analysis, two oval-shaped warm eddies appear on the Figure 5a (top) map at approximately 41° N, 62.5° W and 40° N, 52° W. As evidenced by the plotted SST, these warm eddies were on the cooler water side of the ________ boundary. Careful examination of the SST values in and near these eddies shows that the SST within the eddies must have been warmer than in surrounding seawater. This was confirmed on a color-coded version of the same map distributed by the U.S. Naval Oceanographic Office."

-GULF STREAM NORTH (GSN)

- GULF STREAM SOUTH (GSS)

13. "Assume a cold eddy is forming on the Figure 5a (top) map where a lobe appears east of Delaware at about 39° N, 56° W (and just southwest of a water mass boundary label). Note that the lobe must be surrounded on three sides by warmer water. Comparison of SST in the region indicates that temperatures within the lobe are cooler than those to the the west, south and east. This confirms the possible development of a cold eddy found on the warmer water side of the ________ boundary. This, too, was confirmed on a color-coded version of the same map."

- GULF STREAM NORTH (GSN)

-GULF STREAM SOUTH (GSS)

14. "Imagine arranging three of the red pressure blocks on your Figure 5 ocean map such that they form a straight line on the warm Gulf Stream from east of northern Florida to approximately east of North Carolina. Align the red blocks so the current can be seen along their bases on their northwest side. They represent warm water. Now mentally arrange three blue blocks next to the red blocks above the cold water between the warm Gulf Stream and the coast. The blue blocks represent cold water. Now imagine laying a pencil on the middle red and blue blocks perpendicular to the lines of blocks with the pencil inclined with its point resting on the map. The inclined pencil represents the sloping sea surface. Remembering that water flows downhill and flowing water is acted upon by the Coriolis Effect,"

-IS

-IS NOT

15. "Model the more eastern warm eddy we identified on the upper map in Figure 5a at about 40° N, 52° W by imagining one red block (resting on its base) surrounded by four blue blocks. The model shows that the central elevation of the warm eddy ocean surface is ________ than the surrounding sea surface."

-LOWER

-HIGHER

16. "Use the pencil technique you just applied analyzing the Gulf Stream to determine that this topographical relief causes surface water to circulate ________ as viewed from above."

-CLOCKWISE

-COUNTERCLOCKWISE

17. "Now model the cold eddy we assumed would form on the upper map in Figure 5a at about 39° N, 56° W. Do this by imagining one blue block surrounded by four red blocks resting on their bases. Note on the map that SST values within the developing cold eddy must be cooler than most of the surrounding temperatures. The model shows that the central elevation of the cold eddy ocean surface is ________ than the surrounding sea surface."

-LOWER

-HIGHER

18. "Use the pencil technique again to determine that this topographical relief causes surface water to circulate ________ as seen from above."

-CLOCKWISE

-COUNTERCLOCKWISE

19. "Figure 6 displays the relationship between sea-surface temperatures (SST) and mean velocity of the Gulf Stream along a straight-line track between New Jersey and Bermuda. The figure is based on data collected using an acoustic Doppler current profiler during weekly crossings over a six-year period by the freighter Oleander (and its predecessors). The depiction is a composite plot of all crossings. Color shadings represent SST. Dark straight lines drawn from positions along the ship's path indicate the mean speed of the ocean current perpendicular to the ship's travel. The longer the line, the greater the speed of the current. Locate the longest line. Place an arrowhead on the line's northeast end to make an arrow (vector) that represents the speed and direction of the current. The tail of"

-35.4

-36.4

-37.4

20. "The region between warm (red and orange) to cold (blue) shows the location of the greatest change in sea-surface temperature over distance. The maximum mean velocity of the Gulf Stream is located ________."

-ON THE BLUE, COLD WATER SIDE

-IN THE REGION WITH THE GREATEST COLOR, OR TEMPERATURE, CHANGE OVER DISTANCE

-ON THE WARM, RED AND ORANGE, WATER SIDE

21. "Based on what you have learned in this investigation, you could assume that the water level is ________ to the left of the direction of motion of the Gulf Stream."

-HIGHER

-LOWER

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