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Ocean Currents

Reviews ocean currents, properties of water, and ocean composition

Ocean water is ____ water. Salt
The heat from the sun condenses/ evaporates the water in the ocean leaving only salt behind. Evaporates
Ocean currents are caused by _____ and the amount of ____ in the water. Winds, Salt
An ocean _____ is a river of water running through the ocean. Current
Very salty water is _____ than water that is not as salty. Heavier
Thermohaline currents are warm salty/ cold fresh water ocean currents. Warm Salty
Rivers and lakes are not salty because the ____________ in the water flow to the ocean. Salt (Minerals)
The flow of currents in the northern and southern hemispheres are __________. Opposite
Explain how the water in Earth's oceans became salty. The water billions of years ago washed over dissolved minerals and rocks. The minerals contained substances that formed salts, which is why ocean water is salty.
What's the difference between seawater and brackish water? Seawater is water from a sea or ocean that has an average salinity of 35 part per thousand (ppt) Brackish water is freshwater mixed with seawater. *Where rivers meet oceans. Ex: Mississippi river meets the Gulf of Mexico.
Define Salinity. Salinity is a measure of the mass of dissolved solids in a mass of water.
Cite four criteria scientists use when classifying ocean zones. 1. Amount of sunlight 2. Salinity 3. Density 4. Tempeture
What is a Mid-Ocean Ridge? A mid-ocean ridge is a continuous mountain range that extends through all Earth's basins.
What is an Abyssal plain? Abyssal plains are large, flat areas on the seafloor that extend across the deepest parts of the ocean basins.
Classify resources found either on or beneath the ocean floor. Resources from the seafloor: 1. Energy Resources (oil, natural gas, methane hydrates) 2. Minerals (manganese nodules, gold, zinc)
What is an ocean trench? An ocean trench is the deepest part of the ocean.
List five ways in which water is a unique compound. 1. Only substance which exists as a solid, liquid, and gas. 2. Water has a high specific heat. 3. Water forms drops if you spill it on a counter. 4. Ice floats in a glass of water. 5. Water has unusual properties because of its molecules.
Explain cohesion. The attraction among molecules that are alike.
Explain adhesion. The attraction among molecules that are not alike.
True or false? The density of ice is lower than the density of the same volume of liquid water. True.
True or false? The density of freshwater is lowest at four degrees Celsius. False: Greatest.
True or false? The particles of liquid water are closer together than the particles of the same volume of frozen water. True.
Analyze the importance of water's density to life on Earth. The surface water freezes and floats on top of the pond. The ice insulates the water. The animals in the water survive, because the denser water below remains a liquid.
Explain what happens to a frog's environment during a northern winter. The frog is under the water, and the surface water freezes to ice. The ice keeps the water under the ice warmer than the air above it.
Created by: 304825