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4E-Science Ch D 2
Water in the Oceans
Question | Answer |
---|---|
What does the motion of the water moving up and down form? | A wave |
What do strong and gusty winds blowing over a large area cause? | Storm surge |
What is formed when colder, saltier water mixes with warmer, less salty water? | Deep-ocean current |
Steady winds cause the oceans to flow in paths like rivers. What does this steady flow cause? | Surface current |
What has the greatest effect on changing tides? | Pull of the moon's gravity |
Why does erosion make beaches smaller? | It carries sand and sediment away from the shore. |
What is the motion that would best describe the way waves move? | Up and down |
Why is the gravitational force of the moon on Earth's oceans stronger than the gravitational force of the sun? | The moon is closer to Earth than the sun |
Which factors affect the density of deep-ocean currents? | temperature and the amount of salt |
Why does a deep-ocean current occur? | Denser water flows beneath less dense water. |
Why are waves usually bigger in an ocean than in a small lake? | Oceans have larger areas, so they have bigger waves. |
Water droplets that fall from the clouds because they are too heavy form this. | Precipitation |
What is the process of liquid changing to a gas? | Evaporation |
What is the process of gas changing to a liquid? | Condensation |
What is the process of ocean water constantly changing from liquid to gas and back to liquid? | Water cycle |
What is the daily change in the ocean's water level that is caused by the gravitational pull of the sun and the moon? | Tide |