What is the ratio of freshwater to saltwater on earth A 50 fresh 50 salt B 30 fresh 70 salt C 3 fresh 97 salt D 50 fresh 50 salt C 3 fresh 97 salt Another name for dissolved salt ID: 1026755
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1. Water reviewoceansS6E3 & S6E5
2. What is the ratio of freshwater to saltwater on earth?A. 50% fresh: 50% saltB. 30% fresh : 70% saltC. 3% fresh: 97% saltD. 50% fresh: 50% salt
3. C. 3% fresh: 97% salt
4. Another name for dissolved salt is _____.(Salt)(Water)
5. SalinityAlso known as saline
6. What is the average salinity (% of dissolved salt) in ocean water?
7. 3.5%
8. What is the ultimate source of the salt & minerals in the oceans?A. volcanic eruptionsB. rocks & minerals dissolved in river waterc. all of the above
9. What gases are dissolved in the ocean water?
10. Oxygen&carbon dioxide
11. What does salt do to the ocean water?A. lowers the freezing pointb. makes seawater more densec. creates greater buoyancy – float higherd. all of the above
12. YES! All of these!A. lowers the freezing pointb. makes seawater more densec. creates greater buoyancy – float higherd. all of the above
13. The spin of earth on its axis makes winds & water appear to curve.What is this called?
14. The Coriolis effectnorthern hemisphere = water moves clockwise (to the right)southern hemisphere = water moves counter clockwise (to the left)
15. Yes! Both of these! Magma/lava is melted rock…made of mineralsrivers erode rocks (& minerals) and carry them into the oceansA. volcanic eruptionsB. rocks & minerals dissolved in river waterc. all of the above
16. TRUe or false?Salinity affects the density & freezing point of water
17. True!Salt makes water more dense (more particles are in the water)salt lowers the freezing point of water
18. What is the most abundant salt in ocean water?
19. Sodium ChlorideNaCl
20. What is the correct order of the world’s oceans from largest to smallest?
21. Pacificatlanticindiansouthernarctic
22. Which area below is likely to have the lower salinity?A. A warm tropical gulfB. where a river empties into an oceanWHY?
23. B. where a river empties into an oceanremember…adding freshwater lowers salinityrivers = freshwaterprecipitation = freshwater
24. Where would the salinity of the ocean be higher?A. the cold arctic oceanb. the middle of the Atlantic oceanWHY?
25. A. the cold arctic oceanRemember…temp. matters!salt is left behind inhot areas = evaporationcold areas = freezing
26. A rush of water that flows out to sea in an opening in a sandbar is called A ______________. These can be very dangerous, so look for signs that they are there & swim parallel to the shore if you get caught in one.
27. Rip current
28. What causes tides?
29. The pull of the earth’s waters is caused by the gravitational pull of the moon & the sun. Tides are the rise & fall of the water on the coastlines
30. What do we call the daily tides?(12 hours apart…they alternate)
31. High tide&low tide
32. What do we call the monthly tides?When do they happen? (during What phases of the moon)
33. Spring tide(during full moon & new moonstraight line pull)& neap tide(during 1st quarter & 3rd quarter moons90º angle positons)
34. If A sailboat is traveling around the world without a motor, what can help to move it along, other than winds that blow the sails?
35. currents
36. Fun fact:cold ocean currents can start to move near the poles because cold, dense water sinks.
37. What common cause do waves and surface currents have?
38. They are both caused by wind
39. What is formed as energy is transferred from wind blowing through the water?
40. waves
41. What 3 factors affect the size of waves?(Think…this has to be about wind…)
42. 1. Strength of the wind2. Length of time the wind blows3. distance over which the wind blows
43. When a tsunami hits shore, what part of the wave is most destructive?A. troughb. wave lengthc. wave height
44. c. wave height
45. What do we call a wave at the beach ?(the kind surfers ride or you jump when playing in the water)
46. Breaker waveswhen a wave approaches the shore in shallower water, the wave length decreases, while its height increases, so it topples over and crashes on the beach.
47. Funfact:Between freshwater and saltwater areas, where they “mix”, the water can be somewhat salty.We call this brackish water
48. Fishermen know to pay attention to the winds and temperature of the water because the nutrients that fish need will come towards the surface when this happens…
49. Upwellingwinds blow warm water away, so the cold water moves upward to fill the space, bringing the nutrients & fish upward
50. Know your oceans & be able to answer “travel” questions!
51. Look at the ocean floor topography diagram from left to right. A few questions will follow…
52. What is the correct sequence of the ocean floor features from the shore out to the open ocean?A. continental slopecontinental shelfmid-ocean ridgeB. continental shelfcontinental slopeabyssal plainC. continental slopecontinental shelfabyssal plain
53. C. continental shelfcontinental slopeabyssal plainAbyssal Plain
54. Which feature of the ocean floor is most like the grand canyon?A. abyssal plainsb. oceanic trenchc. Mid-ocean ridgeD. continental slope
55. b. oceanic trenchGrand Canyon
56. Which feature of the ocean floor can be compared to a mountain range?A. abyssal plainsb. oceanic trenchc. Mid-ocean ridgeD. continental slope
57. c. Mid-ocean ridgeMountain Range
58. Which feature of the ocean floor is compared to the European plains? A. abyssal plainsb. oceanic trenchc. Mid-ocean ridgeD. continental slope
59. A. abyssal plainsPlains: Like The Great Plains, European Plains
60. Please, Study! Remember…we are getting ready for our unit 4 test.Making the grade = enrichment rewardnot making the grade = review work