Which Way the Winds Blow

The Earth's uneven heating is caused by the tilt of the Earth on it's axis, its path around the sun, and its shape. In one of our activities this was demonstrated. We took a flashlight and shined it down on a globe. You could see how the light only hit certain areas. I found this activity to be helpful to understanding this concept. Earths rotation creates wind. The coriolis effect causes the winds to go to the right in the northern hemisphere and to the left in the southern hemisphere. The winds circulate because warm air rises and travels up then cools and travels back to the equator. This process continues creating wind. Deserts are found at 30 degree latitudes because that's usually where the winds head back to the equator, so not much weather occurs there like rain, meaning there wont be much plant or animal life. There are many different types of wind. The doldrums are at the equator. The westerlies, also called the jet stream, go west to east between the 0 and 30 degree latitudes. The horse latitudes are the 60 degree latitudes.

Global warming could change wind patterns because the wind will travel farther and it wont cool and sink back to the equator. This could make the wind patterns go crazy.

Island ACtivity

When developing an island there is a lot to be concerned about. The biggest problem with developing is that we didn't want to ruin the natural processes of the island. We put the houses and the resort on the ends of the island so that it would not ruin the mangroves or natural wildlife on the east and west side. We put the science center near the sea turtle nesting site on the east side of the island so that they could help the animals and make sure that the natural island processes are going well. There are docks all along the island so that boats can be docked. The center of the island is dedicated to nature. There is no development in the center of the island. I think the foot print of our island is very small. We tried to only develop in small areas so there would be less pollution etc. on the island.

A Beach by Any Other Name

“A Beach By Any Other Name”

1.       Physical and geological characteristics used to classify Earth’s dynamic coastlines are bays, capes, coves, gulfs, headlands, and peninsulas.  Also, different types of sands such as silt, cobbles, and gravel are used to identify coastlines.

2.       A. Shepard Coastal Classifications

a.       Acadia National Park, Maine – Primary, land erosion, fjord

b.      Cape Cod, Massachusetts – Primary, glacial erosion

c.       Chesapeake Bay, Virginia – Primary, drowned river valley

d.      Atlantic City, New Jersey – primary, drowned river valley

e.      Mississippi Delta, Mississippi – Primary, partially drowned delta

f.        Kilauea Coast, Hawaii – primary, volcanic eruption

g.       San Francisco Bay, California – primary, flooded river

h.      North Carolina’s Outer Banks – secondary, barrier islands

i.        Indian River Lagoon, Florida- secondary, marine deposition

j.        Puget Sound, Washington- primary, fjord

k.       South Florida/Florida Keys- secondary, coral reefs

l.        Strait of Juan Defuca, Washington- primary, glacial erosian

m.    Cape Canaveral, Florida- secondary, barrier islands

n.      Aleutian Islands, Alaska- primary, volcanic

o.      Florida Gulf Coast- secondary, wave erosion fault line

p.      Texas Gulf Coast – Secondary, irregular through wave erosion

q.      Myrtle Beach, South Carolina – Primary, land erosion, dune coasts

r.        Prince William Sound, Alaska – Primary, lava flow coast

 

 

 

 

 

 

Sand Reflection

In the sand lab, I was very interested by the features of the sand. It is cool to see that there is more to the sand than meets the eye. There are many different things to look at when observing the sand. The catagories include size, shape,texture, magnitude, composition, and color. Most sand was well sorted. There was alot that was composed of rock and some had shell pieces and coral also. On the Wentworth scale, most of the sand was one mm big. Many of the sand samples that I observed came from continental crust and areas where the waves were more calm, resulting in angular shape and light colors. Looking at the sand through the microscope was very cool. I took the picture below of sand from Cancun, Mexico.

Bathymetric Mapping

How can ocean floor features be measured and mapped using current acoustical technology? How can ocean floor maps be used in the commercial, military, and/or private sector? 

Ocean floor features are mapped using sonar. Sound is bounced off the ocean floor, the rate at which it comes back shows what the floors look like. Ocean floor maps are used to navigate the ocean so no one hits a ridge or goes over a section where magma might be flowing out.

A map of the ocean floor

Our seafloor was mostly flat but had a ridge on one side. Using remote sensing technology is better than direct observation because it allows you to know the actual size of the features and their depths. Vertical exaggeration is helpful because it allows the features to be exaggerated so it is easier to see them. This activity was valuable to my science knowledge because It helped me to see the advantage of using sonar to map the ocean seafloor. Are there any problems with using sonar to map the ocean floor features? If we have this technology, why haven't we been able to map the whole ocean floor?

Theory of Continental Drift

During the "dance of the continents" activity, I  learned that thousands of years ago, all of earths land was one large land mass with one big ocean. The continent broke apart because of plate tectonics, the belief that earths crust is six large plates which continually move along earths surface. Another factor to the theory of continental drift is the idea of seafloor spreading, which is the theory that there are cracks in the seafloor where magma pours out and then cools, making new crust which slowly pushes away the old crust, enlarging the seafloor.


My picture of Pangea

Scientists share information with each other in order to strengthen their theories. Without the theories of seafloor spreading and plate tectonics, then Wegner's theory of continental drift would not have enough information to back it up. I believe that these theories are real and that there really was one large continent that moved apart, and that in the future our Earth will look much different.

Experimental Design

If I was to design an experiment for studying the mating habits of clams I would make sure to bring a lot of food. Because it takes like a week to get there and a week to get back you would probably stay a week so you need like three weeks worth of food. You would also need diving equiptment such as wet suits, flippers, goggles, and oxygen tanks. I would bring an underwater flashlight because the clams mate at night. I would also bring a camera to take pictures of the mating clams. Id bring little jars to collect samples in. This is what I would bring for my experiment.