Question | Answer |
What is a water molecule made up of? | one oxygen and two hydrogen =h2o |
Define Polarity. | having poles or being polar opposites. |
Explain/Example of cohesion | the attraction among molecules that are alike.
a bug sticking/touching a wet surface. |
Explain/Example of adhesion. | the attraction among molecules that are not alike.
water molecules sticking to another surface. |
Why does ice float in water? | The ice density is greater than the water's density. |
What will happen when sugar is added to water? | The sugar will dissolve. |
Why do water molecules attract each other? | Opposites attract. |
What states of matter can water exist on Earth? | Solid, Liquid or Gas. |
What are five of Earth's oceans? | Pacific, Atlantic, Arctic, Indian and Southern ocean. |
Two sources of water? | Water vapor expelled from volcanoes, and melted ice from comets and meteors. |
How do the oceans become salty? | minerals break apart and form salts into the ocean. |
Define salinity. | a measure of the mass of dissolved solids in a mass of water. |
Difference between seawater and brackish water? | seawater- contains saltwater, 35ppt
brackish water- mixture of saltwater and freshwater |
Identify five features of the ocean floor. | continental margins, abyssal plains, mid ocean ridges, ocean trenches |
what are three ocean zones? | surface zone, middle zone and deep zone. |
describe how much sunlight each ocean zone gets. | surface zone- shallow water, gets most sunlight.
middle zone- wavelengths absorbed
deep zone- plants dont grow, no sunlight |
density currents are caused by this. | changes in density. (bc their called density currents obv) |
which ocean current is caused by wind? | upwelling currents. |
which ocean current is caused by density differences? | density currents |
which ocean current is caused by water moving horizontally? | surface currents. |
how do ocean currents affect the weather? | cold water currents release moisture into the air. |
what is the role of upwellings? | it brings cold water to the surface where it is warmed by the sun |
how many gyre's are there? | five total. |
what are the names of all the gyre's | north pacific, south pacific, north atlantic and south atlantic gyre's + indian ocean gyre |