1 / 19

Anatomy of a Wave

Anatomy of a Wave. Waves- Main Causes. Waves do not move across the water, they rise and fall in one place ( a circular motion ) Wind blows across surface of water, transfers E to water, then that E is what moves through the water Wave size ,as depth Waves will not form too deep .

berne
Download Presentation

Anatomy of a Wave

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Anatomy of a Wave

  2. Waves- Main Causes • Waves do not move across the water, they rise and fall in one place (a circular motion) • Wind blows across surface of water, transfers E to water, then that E is what moves through the water • Wave size ,as depth • Waves will not form too deep

  3. Waves- How it Affects Water • Undertow- subsurface current near shore that pulls objects out to sea (p. 429 Figure 5) • Longshore Current- water current travels near & parallel to shoreline & form where waves approach the beach at an angle • White caps- waves form in open ocean during stormy weather, white foaming, short lived, steep crests) • Tsunami-

  4. Surface Currents – Main Causes • Horizontal , stream-like movements of water near ocean’s surface • Directly controlled by wind • Ex. Gulf Stream- longest surface current

  5. Surface Currents – Main Causes (Con’t) • Global Winds- winds blow across Earth’s surface (Equator- blow E to W Poles- blow W to E) 2. Coriolis Effect- (p.418) curving of straight moving object due to Earth’s rotation 3. Continental Deflection- surface currents hit continents and deflect (change direction of current) (Ex. South Equatorial Current p. 418)

  6. Surface Currents- How It Affects Water • TEMPERATURE (p. 419)- Hot water vs. cold water currents • Warm-water currents- start near equator & carry warm water to other parts of ocean • Cold-water currents- start near poles & carry cold water to other parts of ocean

  7. Deep Currents-Main Causes • Stream-like movements of water deep below ocean’s surface • NOT Directly controlled by wind • Occurs deep in part of ocean where water density • 2 Factors Change Density • Salinity = Density • Temperature = Density

  8. Currents-Main Causes (Con’t) • Temperature: Warmer = less dense (become surface currents) Cools = more dense (falls becomes water in deep currents) REMEMBER CONVECTION Cold near polar regions, molecules condense becomes more dense and sink, while moving toward equator as deep current (p. 420) • Salinity: freezing top water pushes salt out to bottom water = more dense = deep current; Evaporation in warmer climates leaves salt behind = more dense = deep current

  9. CONVECTION CURRENT REVIEW • Sun initial E source of winds and currents • Sun hits Earth in some areas more than others • Hot/ warm water rises, Cold/ cool water sinks • WHICH OCEAN CURRENTS DO YOU THINK CARRY MORE THERMAL ENERGY, CURRENTS NEAR THE EQUATOR OR NEAR THE POLES?

  10. Deep Currents- How Affects Water • Temperature of water affected • Gives organisms (living things) a cold environment in deep ocean

  11. Just Listen To This • Sir Isaac Newton and the moon • Every particle on Earth is pulled by the moon’s gravity • Liquids are pulled more than solids • As moon rotates around Earth, part facing the moon pulled the most (HIGH TIDE) and directly on opposite side of the Earth at same time (p. 433 Fig. 2) • Level of water in between gets lower (LOW TIDE) • Both the sun and the moon effects tides, the moon effects tides the most • Tides- the daily changes in the level of the ocean • Tidal Range- difference in level of ocean between high and low tide

  12. Spring Tide (Main Causes) • Spring Tides Occur: (p. 434 Figure 4) • sun, Earth, and moon are aligned (During new and full moons/ every 14 days) • Moon and sun on opposite sides of Earth

  13. Spring Tide (How it Affects Water) • Have the largest daily tidal range

  14. Neap Tide (Main Causes) • Neap Tides Occur: (p. 434 Figure 4) • sun, Earth, and moon form 90 degree angle (During first and third quarters of the moon/ halfway between spring tide times) • Moon, sun, and Earth gravitational pull work against each other

  15. Neap Tide (How it Affects Water) • Have the smallest (minimum) daily tidal range

  16. Phases of Moon • Phase- different appearances of moon due to its changing position • Light on the left leaving (LLL), light on the right returning

  17. Waxing and Waning of Moon • Waxing- sunlight part of moon getting larger • Waning- sunlight part of moon getting smaller Page 662 Figure 3 • Half the moon is always covered in sunlight and half the Earth is always covered in sunlight • What we can see from our position is the only thing that changes

  18. Solar vs. Lunar Eclipse • Eclipse- an event where shadow of one celestial body (sun, moon, or Earth) fall on another • Solar Eclipse- when the moon comes in between the Earth and the sun (blocks sun) • Lunar Eclipse- when Earth comes in between the sun and the moon (shadow of Earth falls on moon)- moon actually has a red color

  19. Moon, Earth, and Sun Positions • Moon travels around Earth • Earth travels around sun

More Related