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Ocean Currents
Properties/Composition/Currents
| Question | Answer |
|---|---|
| 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^_^
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