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science
this will help you get a good grade on your science test
| Question | Answer |
|---|---|
| What makes water a unique compound? | Water is a substance that goes in the state of liquid ,gas ,and a solid. Water also is a solvent and is polar. |
| What is polarity? | Polarity is a condition in which opposite ends of a molecule have slightly opposite charges, but the overall charge of the molecule is neutral. |
| What causes drops to form when a spill occurs? | Water forms drops because of strong forces between water molecules. |
| Why does ice float? | Ice floats because ice is less dense than water. |
| Why do molecules attract each other ? | Cohesion |
| How does ice make it possible for organisms to live in the lake in the winter? | Because as the ice freezes the top is doesn't go all the way to the surface making ice they insulator and organisms such as fish can survive the winter. |
| What is cohesion? | Cohesion is the attraction among molecules that are alike |
| What is adhesion? | Adhesion is the attraction among molecules that are not alik |
| What are 2 sources of water for Earths oceans ? | Comets and Asteroids /Condensation |
| Explain how the water in the Earths oceans become salty? | The rain that fell to Earth’s surface billions of years ago washed over rocks and dissolved minerals. The minerals contained substances that formed salts. The salt carried on thourgh the river making the rivers salty. |
| What is brackish water? | Brackish water, or brack water, is freshwater mixed with seawater. |
| What is the difference of seawater and brackish water? | Brackish water is fresh water mixed with seawater and seawater is water directly from the sea. |
| What is salinity? | Salinity is a measure of the mass of dissolved solids in a mass of water. |
| What are the resources of the seafloor? | Energy Resources/Minerals |
| Why is river water near an ocean is sometimes salty? | Sometimes salt gets carried through oceans and the salt can dissolve in the river water. |
| What are the four criteria scientists use when classifying ocean zones? | Sunlight/Density/Temp./Salinity |
| What is a ocean current? | An Ocean current is a large volume of water flowing in a certain direction. |
| How does the Surface Current occur? | The friction generated by wind on water can move the water. As wind blows over water, the moving air particles drag on the surface and cause the water to move. |
| What is a gyre? | A gyre is a circular system of currents. |
| What is the Coriolis Effect. | The Coriolis effect is the movement of wind and water to the right or left that is caused by Earth’s rotation |
| How does Upwelling occur? | Upwelling occurs when wind blows across the ocean’s surface and pushes water aw ay from an area |
| What are the direction in movement of Gyre in southern and northern hemisphere? | Gyres in the northern hemisphere circle clockwise. Gyres in the southern hemisphere circle counterclockwise. |
| What are they effects of Upwelling? | Upwelling brings cold, nutrient-rich water from deep in the ocean to the ocean’s surface |
| What direction does density currents move water? | Density currents move water downward |
| Is there more than one system of currents? | Yes.This current system is called the Great Ocean Conveyor Belt. |
Created by:
shugreigal
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