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Across 1. Ocean water near the poles ______ causing higher salinity. 3. ______ ocean water near the poles sinks deep down. 6. Cold air from the ______ flows towards the equator. 7. Just over 1% of Earth's fresh water is ______ water in lakes, rivers and swamps. 9. ______ in its pure form cannot be used by living things. 10. Meteorologists gather data about weather all around the world to prepare weather ______. 12. The ______ of ocean water is how salty ocean water is. 15. The Glen Canyon Dam helps prevent ______ of the Colorado river. 17. ______ and some bacteria can change or 'fix' nitrogen into a form that is useful to living things. 18. ______ can prevent beach sand from being washed away by storms. 19. Saltier ocean water is ______ and sinks down. 20. A long row of undersea mountains and volcanoes called a mid-ocean ______ . 22. A weather station ______ gathers data about conditions on the ocean. 23. In the summer, ______ receives a lot of sunlight, and nutrient-rich water welling up cause phytoplankton populations to grow. 26. ______ covers about 71% of Earth's surface. 27. Shrimp-like creatures called ______ feed on phytoplankton and are food for many other animals. 29. Wind is one effect of the ______ heating of Earth's surface. 31. A shallow ocean floor extending from the continental coast for some distance into the ocean is called a continental ______. 32. Powerful storms, hurricanes and tsunamis can change coastlines ______. 35. The vast, flat, deep area of the ocean floor is called the ______ ______. 37. The process of changing nitrogen into a form useful to living things is called ______. 40. Phytoplankton provide ______ for many ocean organisms form small snails to baleen whales. 43. The area of sea shore between high and low tides is called the ______ ______. 44. The lower part of the continental slope is the continental ______. 45. Cold ocean water sinking and then slowly rising is called "the global ocean ______ ______". 46. This is the word for the amount of water vapor in the air. 48. ______ serve as buffers between land and sea, slowing erosion. 49. Deep ocean water slowly rising toward the surface slowly warms and brings ______ with it. 51. The movement of ocean water can change ______ gradually. 52. El Nino and La Nina affect the ocean surface ______, which affects climate and weather patterns.

Down 2. Warm air near the ______ rises in the atmosphere. 3. Many ______ are sensitive to ocean tempreature changes. 4. A phytoplankton ______ is a sudden explosion in the population of this organism. 5. Warm surface ocean currents transfer ______ into the atmosphere. 6. Anything that dives deep into the ocean must deal with tremendous ______. 8. Humans can ______ coastal change (reduce it for a while). 11. There are advantages and disadvantages to all human ______ . 13. Many different technologies in many different ______ around Earth are required to forecast weather events. 14. Surface ocean currents are driven mainly by ______. 16. The Cliffs of Moher (Ireland) expose rock ______ hundreds of millions of years old. 18. The steep area where the ocean rapidly gets deeper as you move away from the land is the continental ______. 21. ______ makes up around 30.1% of Earth's fresh water. 24. Plants and animals release ______ ______ into the atmosphere during respiration. 25. A deep, valley-like part of the ocean floor is called a ______. 28. Most of the world's oxygen is supplied by microscopic organisms called ______. 30. Humans can make ______ containing nitrogen that help plants grow better. (p405) 33. ______ release carbon into the soil when they break down dead organisms. 34. The Glen Canyon Dam produces ______ energy for many people. 36. Weather ______ gather many data about conditions around their location on Earth. 38. The global ocean conveyor belt is a pattern of ______ that helps distribute energy and nutrients throughout the ocean. 39. Weather balloons carry a technology called ______ that transmits many data about air conditions. 41. Weather ______ orbit Earth and gather data such as cloud cover. 42. Glaciers and polar ice caps make up about 68.6% of Earth's ______ water. 47. The salinity of ocean water ______ (it's not the same in all places). 50. About 96.5% of Earth's water is ______ water.