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Ocean Currents


How do icebergs float? The seawater is denser than the icebergs that has air bubbles in it which makes it less dense.
What are Gyres and how many of them are in the world? Gyres are groups of ocean currents that make a huge circulation in an ocean, there are 5 Gyres.
What are ocean currents and what are some ways they are powered? Moving seawater that carry anything across the oceans. Density, global winds, and the Coriolis effect.
What is a cold vertical current called? A updwelling.
How does the Coriolis effect affect ocean currents? The Coriolis effect makes wind spin clockwise in the northern hemisphere and counter-clockwise in the southern hemisphere due to gravity. It pushes currents along.
How does currents affect climate? Current from the poles are cold, while currents from the equator are hot. This effects the climate of where the currents end.
What is the strongest current in the oceans? The Antarctica Circumpolar current.
What are density currents? Vertical currents that move water upward from deeper parts. Forms ice when in polar areas, which increase surface salt and sinks, bringing up deeper water.
What does the "Ocean Conveyor Belt" bring around the world? Thermal energy.
How does the seas and oceans first have salt? Rain from billions of years ago wash over rocks with salt and carry it into basins to make oceans and seas.
What is water that is between fresh and salty water called? Brackish water.
What does the seafloor look like? The seafloor can be flat, bumpy, or filled with plants. There are underwater volcanoes, mountains and abysses.
What are abyssal planes? Large flat parts that extend in the deep parts of the oceans.
What is water displacement? Something that is submerged is buoyed up by a force equal in magnitude to the weight of the fluid it displaces.
What is the salinity of brackish water? Usually between 1 ppt and 17 ppt.
What is a continental shelf? A flat expanse of land in a shallow piece of water.
Why do water drops form? Many of water's unusual properties and attraction and repulsion of its atoms with each other causes this.
Water is sometimes referred to as an universal solvent, why? So many substances can dissolve in it.
What is cohesion? The attraction among molecules that are alike
What is adhesion? The attraction among molecules that are not alike
How is waters density unusual? When other substances become colder, they become denser. But when water gets to 4°C it the molecules start to move apart and become less dense.
How does water help lake organisms survive in the winter? If the water at the bottom and top are different,they change place. After the top freezes, it floats and creates a layer of insulation.
What is a water molecule made of? 2 hydrogen and 1 oxygen.
What is polarity? The condition in which opposite ends of a molecule have slightly opposite charges, but the overall charge of the molecule is neutral. Like in a water molecule.
Created by: Llamas^_^