Print By Amy Cowen on June 7, For World Oceans Day, talk with students about this problem and ways in which everyone can help reduce the amount of plastic trash flowing into waterways. The theme of this year's global observance is the importance of reducing plastic pollution that is making its way into our oceans.
Waves and Tides Waves Waves are among the most familiar features in the ocean. All waves work similarly, so although we are talking about ocean waves here, the same information would apply to any other waves you might discuss in science classes.
Ocean waves transport energy over vast distances, although the water itself does not move, except up and down. This may surprise you, but if you think about it, once you are past the breakers on your raft, you pretty much just bob up and down. You might drift up the beach.
This orbital motion is explained in the figure below: There are waves of all sizes and shapes rolling into the beach at any given time. The most familiar ocean waves are caused by the wind. These are wind-driven waves. This sort of motion is set up anytime two fluids rub together, and remember that the atmosphere is essentially fluid.
Waves caused by underwater disturbances such as earthquakes, landslides, or volcanic eruptions are called tsunamis. These waves are typically tens to hundreds of kilometers long. The gravitational pull of the sun and moon on the earth causes the tides which are actually tidal waves.
The following list refers to the figure below: When two groups of waves meet, they pass right through each other. This is obvious if you consider light and sound waves. When two people talk or your child has both the TV and the stereo on, you can hear both. Likewise you can see two objects at the same time.
What does happen, though is that waves can either add up or cancel each other out as they pass through one another. This property is called superposition. If a crest from one wave happens to line up with the trough of another, they cancel each other out. This is called destructive interference.
If two waves line up crest to crest or trough to trough, they add up. This is called constructive interference. This is why waves at the beach are all different sizes.
A special type of standing wave is a seiche. When you get just the right steady wave frequency going in your tub or your cup, the motion quickly builds up and water or coffee sloshes all over the place.
When harbors are designed, care has to be taken to give water built up in seiches some way out other than sloshing up into the first floor condos. Waves Hitting Things When a wave hits a hard vertical surface it is reflected.
In other words, the wall pushes the water back just as hard as it got pushed, and sets up waves in the other direction. With constructive interference, you end up with bigger and therefore stronger waves.
This is why, in the long run, solid seawalls are not good for saving property from the ocean. You end up creating stronger waves that cause even more erosion. Waves are also refracted. Here is an example of shallow water waves waves getting steered by the seafloor.
This is shown in the figure. You have no doubt noticed when you swim in the ocean that you tend to drift down the beach.Here is an easy to read information about our Oceans and what controls them and how mankind affects it.
It includes visuals to help understand the different processes that make the motion. is no indicatio n in the recor d that t he Defendant s Blue Oceans Distributing, LLC, Midway Distributor LLC, and named individuals were served with a copy of the complaint or this motion.
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The motion of the drifting buoys seemed partly correlated with the wind speed and direction. We launched two buoys near the FPO station on 17 September, when the wind was weak. The buoy with a drogue at a depth of 15 m above the pycnocline was stagnant at the beginning (Figure 3 a).
The oceans help to distribute heat and cold; without the oceans, climate variations would be much more severe. motion and ability to transmit energy.
pollution and the importance of taking care of the oceans. 2. The discussion leader should draw a connection between this discussion and Introduction, question 2, that a. Oceans in Motion: Waves and Tides. Waves. Waves are among the most familiar features in the ocean.
All waves work similarly, so although we are talking about ocean waves here, the same information would apply to any other waves you might discuss in science classes. Mar 24, · I have the Oceans Motions 4-way, it's a sweet piece of equipment, there are supposedly some issues with it making thumping and thudding sounds, but as far as i have read these are down to plumbing irregularities i.e.
too many 90's or constriction in piping.