Blog Entries
Conditions of Use
|
|
Stream Tables
Article posted May 27, 2009 at 11:35 PM GMT •
comment • Reads 151
|
|
Not too long ago, our class did an experiment with stream tables, which is basically looking at how streams flow and form.
My team did an experiment where we changed the soil material to materials like gravel, silt sand, and dirt, and then observed how that affected erosion by measuring the width of the channel.
I predicted that with silkier and sandier marterials, landslides will form and erode more because those materials are looser, so they will slide easier. Meaning that there is a higher chance for a landslide, considering the materials are also lighter.
We found out that as the soil material changed to a silkier substance, the width of the channel increased because the water flowed over the sand instead of sinking into like it did with the dirt and gravel. The highest result was a width of 3 cm for sand. The lowest was 2 cm for gravel and dirt. The only problem we might of had was that the amount of soil material could have been a little different each time. I wonder what would happen if we used a different liquid to make a stream table instead of water.
 http://i40.tinypic.com/10wjjf8.jpg>
:]
|
|
Article posted May 27, 2009 at 11:35 PM GMT •
comment • Reads 151
|
|
o d y s s e y : )
Article posted May 27, 2009 at 11:31 PM GMT •
comment • Reads 312
|
|
In case you're wondering, Odyssey is a camp that all of the eighth graders go to for a week up at Lake Crescent.
So that's what happened last week. I don't know about all the other eighth graders, but I had a good time. haha. It was actually pretty cool, and funner than I expected :)
The hikes that I went on were Sol Duc, Marymere Falls, Ozette Lake, Hurricane Ridge, Cape Flattery, and probably more but I don't remember.
My favorite part about Odyssey was skit night.
My least favorite part about Odyssey was probably when I fell, which I did a few times, hahaha.
I'm totally going back to be a counselor though :D
|
|
Article posted May 27, 2009 at 11:31 PM GMT •
comment • Reads 312
|
|
Earthquake Waves
Article posted May 5, 2009 at 02:04 AM GMT •
comment (3) • Reads 392
|
|
There are 4 different types of earthquake waves;
+P waves.
p waves are a type of elastic wave that can travel through gases, elastic solids and liquids, like the earth. p wave stands for primary wave, or first, because it is faster than the other elastic wave (s wave). a p wave moves parallel, like through a slinky.
+S waves
s wave stands for secondary wave. s waves move perpendicular, like waves in a rope, and move through the body of an object- solids only.
+Love waves
love waves are a type of surface wave. they move the ground from side to side in a horizontal plane but at right angles to the propagation. the shaking of love waves damage structures greatly.
+Rayleigh waves
rayleigh waves are also a type of surface waves. like rolling ocean waves, rayleigh waves move up and down in a vertical plane pointed in the direction of which the waves are travelling.
|
|
Article posted May 5, 2009 at 02:04 AM GMT •
comment (3) • Reads 392
|
|
Energy--->Transformations
Article posted May 5, 2009 at 01:47 AM GMT •
comment • Reads 189
|
|
There are two major heat sources: the earth and the sun. The earth does not have enough energy to support itself, so it relies on the sun. Sunlight on the earth's surface is attenuated by the earth's atmosphere so less power arrives at the surface, making it less hot. The sun's energy can be used via photosynthesis by plants which capture the energy of sunlight and converts it to a chemical form of oxygen and reduced carbon compounds. Photosynthesis is a basic energy source for all living organisms, and we would not have the same planet without it.
http://i42.tinypic.com/16h3y2x.jpg>
|
|
Article posted May 5, 2009 at 01:47 AM GMT •
comment • Reads 189
|
|
4/22/09
Article posted April 23, 2009 at 02:29 AM GMT •
comment • Reads 596
|
|
|
|
Article posted April 23, 2009 at 02:29 AM GMT •
comment • Reads 596
|
|
Plates.
Article posted April 23, 2009 at 02:22 AM GMT •
comment • Reads 271
|
|
Soooo pretty much, a while ago my class did an Earth Movement project and we studied plate boundaries.
I learned that there are 3 main types of tectonic plate boundaries: divergent boundaries, convergent boundaries, and transform boundaries.
divergent boundaries: when plates are moving apart from a common point.
convergent boundaries: when 2 plates come together or join at a common point.
transform boundaries: when 2 plates slide past each other.
The plates move by diverging or converging along their borders. Then, a great amount of energy is released, which causes the Earth's surface to change. No single plate can move without affecting another, they are all interconnected.
The specific plate that my team studied was the Pacifc Plate boundary. There are many things going on at the Pacific Plate. There are chains of volcanoes, areas that are below sea level, trenches, high elevation, and new land located on that plate. I also learned that the Pacific Ocean is actually shrinking. As the Atlantic Ocean gets bigger, the Pacific gets smaller. It does this by folding the sea floor towards the center of the Earth, which is called subduction. The bumping and grinding is difficult, so many earthquakes and volcanoes happen when the pressure builds up and once the rocks break at this point. The Atlantic Ocean is expanding because it is located at a mid-ocean ridge which has lava flow that pushes out the rock around it, causing the ocean to move and push the continent with it. It has very few trenches with nowhere to go so the land recycles them. Also, the crusts are connected which causes the continents to get bigger.
|
|
Article posted April 23, 2009 at 02:22 AM GMT •
comment • Reads 271
|
|
earthy stuff :)
Article posted March 9, 2009 at 04:28 AM GMT •
comment (1) • Reads 94
|
|
In our earth, there is a thing called lithosphere. The lithosphere is the outer part of the earth and consists of the crust and upper mantle. The lithosphere is fragmented into plate tectonics which move in relative to one another. Plate tectonics is the theory that the earth's surface is divided into large thick plates that move continually. Plate tectonics are also what cause earthquakes.
Lithosphere:
There are two kinds of lithosphere:
Oceanic lithosphere.
Continental lithosphere.
Oceanic lithosphere is associated with oceanic crust. It mostly consists of basalt (density of 3 g/cm cubed) and peridotite (density of 3.3 g/cm cubed), and is denser than the continental lithosphere.
Continental lithosphere is associated with continental crust. It has a low density crust and upper mantle that are buoyant.
|
|
Article posted March 9, 2009 at 04:28 AM GMT •
comment (1) • Reads 94
|
|
Float yo' Boat :D
Article posted February 25, 2009 at 05:15 AM GMT •
comment (4) • Reads 397
|
|
Problem: How does the volume affect how many pennies an aluminum boat can hold without sinking?
Hypothesis: I predict that the less volume the boat has, the less amount of pennies will be able to float because as you decrease the volume, the boat gets smaller so you won't be able to add as many pennies.
Boat 1 (12x12x0 cm): 16 pennies.
Boat 2 (10x10x1 cm): 42 pennies.
Boat 3 (8x8x2 cm): 34 pennies.
Boat 4 (6x6x3 cm): 25 pennies.
Boat 5 (4x4x4 cm): 13 pennies.
|
|
Article posted February 25, 2009 at 05:15 AM GMT •
comment (4) • Reads 397
|
|
Dilemna= Density!
Article posted January 28, 2009 at 01:36 AM GMT •
comment (2) • Reads 383
|
|
So basically we're doing this project in class called "Density Dilemna." What we have to do is write a letter to King Hiero II explaining which of 5 crowns is made of pure gold. To find this out we have to use... DENSITY!
To get the density of a crown you must divide the mass and volume, then you will get the answer.
:D
|
|
Article posted January 28, 2009 at 01:36 AM GMT •
comment (2) • Reads 383
|
|
|
