| A | B |
|---|
| 80% of ocean water is in which zone? | deep zone |
| Most common mineral in seawater | sodium chloride (NaCl) |
| Ocean water is saltiest where... | evaporation is high and freshwater mixing is low |
| The ocean layer of rapid temperature change with depth is the | thermocline |
| What happens to a wave as the speed and length of a wave decrease? | Wave grows higher |
| What are ocean surface currents created by? | Friction with wind |
| Why is upwelling important? | it brings nutrients to the surface which starts the ocean food chain |
| The Coriolis effect deflects currents... | clockwise in the N hemisphere, counter-clockwise in the S hemisphere |
| Density currents are created by | differences in ocean water density |
| What happens to the pH of ocean water as CO2 is added? | pH decreases |
| What is water made up of? | 2 Hydrogens, 1 Oxygen |
| How did the oceans get so salty? | weathering of rock on land & volcanic eruptions |
| What are true of active margins? | trenches, skinny shelf, volcanic and earthquake activity |
| How do cold currents move? | away from the poles |
| How do warm currents move? | away from the equator |
| What is the order of the continental margin out from shoreline? | Shelf-Slope-Rise |
| What causes waves to get taller & eventually crash? | when waves interact with the ocean floor |
| pH of bases | above 7 |
| pH of acids | below 7 |
| strong acids and bases... | on the far ends of the pH scale away from 7. |
| weak acids and bases... | are right next to 7 on the pH scale |
| Acids release ___ in water | Hydrogen ions |
| Bases release ___ in water | Hydroxide ions |
| Technology used to study the ocean floor | SONAR, satellites, and submersibles |
