- Slides: 28
Ocean Currents And Tide Chapter 16. 1
Ocean Currents • Masses of ocean water that flow from one place to another.
Currents • Two types of ocean currents: – Surface currents – Deep currents
Surface Currents that ONLY move horizontally in the UPPER part of the Oceans surface • Develop from friction between the ocean and the wind that blows across the surface.
Color your surface current map using the Key on your Surface Current Map! BLUE = Cold Current RED = Warm Current
Global Winds Create Currents Draw and Label a Global Winds Diagram according to this diagram.
Gyres • Huge circular-moving current systems that are driven by the global winds. • 5 main gyres!
Gyre Plastic Pollution
What if this was YOUR home?
Locate the 5 main Gyres on your surface current map. Label the Gyres on your map
Why? Great Britain and Alaska are at similar latitudes, yet Great Britain is about 25 degrees warmer than Alaska…
Ocean Currents and Climate Gulf Stream is a great example of bringing warmth to a high latitude. It brings heat from the equator region to areas more North and South
Deep Currents • VERTICAL (up and down) currents of ocean water • Caused by differences in water density • Cold Dense water SINKS • Warm LESS dense water RISES
Deep Currents • A result of temperature or salinity changes temp = sinks salinity = density sinks Color in your Global Conveyor Belt diagram
Tides Chapter 16. 2
What is a Tide? • The rise and fall of the sea level.
The gravitational pull of the Moon and the Sun make the tides
Sun Vs. Moon • The Sun is much larger than the Moon but has ONLY about ½ of the power of the Moon on tides WHY? Because the Moon is Closer
Types of Tides • Two types of tides: Spring Tides Neap Tides
Spring Tides • The Sun, Moon and Earth are in a straight line.
Spring Tides • Highest High Tides and Lowest Low Tides • Why?
Spring Tide • ALL Gravitational Force!!
Neap Tides • When the Sun Moon and Earth are at right angles.
Neap Tides • Tidal Range is the smallest. (NOT MUCH DIFFERENCE between high tide and low tide!) • Why?
Neap Tide Forces • TWO different forces • Gravitational and Centrifugal
In the boxes at the bottom of your notes Spring Tide vs. Neap Tide Spring Tide Force is all in one direction HIGHEST HIGHS & LOWEST LOWS Neap Tide Force is from two directions at the same time LOW HIGHS & HIGH LOWS
Tide Animations How Tides Work Time Lapse High Tide The Bay of Fundy https: //www. youtube. com/watch? v=5 oh. DG 7 Rq. Q 9 I https: //www. youtube. com/watch? v=s. MKvq. MUZw. V 4 https: //www. youtube. com/watch? v=OP 0 cp. Xpw 8 yk