Percent change in water

Sand- 175/100*100=175

Potting Soil-225/100*100=225

Mudflow damage!

1.What conditions might cause mud to flow?
A lahar can cause a mud flow.
2. What conclusion can you draw from the two images?
When the board is at a landslide then the mud on the board will move.
3. List at least two ways you could make the mud slide off the 30° slide plane without changing the plane's angle.
1. You could change the about of sand you put on the slide
2. Or you could change the amount of water you add.
You could add water to it and you can add more dirt.
4. What conditions in nature would be represented by the answers you gave for question 3?
The more the rain the dangerous it could be for people, And the steeper the hill.
5. List at least two factors that contribute to the formation of mudflows on volcanoes.
1.Water
2.Gravity
6. How might forest fires affect an area's potential for experiencing mudflows?
If its on a hill a steep hill and if a fire were to start then it would heat up the water thats in the ground and then a mudflow would start.
7. Hypothesize about how mudflows could change the topography of an area after a fire.
It can change by when a fire heats it up then it will start to move.
8. What human activities strip soil of its protective vegetation and increase its vulnerability to mudflows?
Dry Sand. The type of sand that isn't so wet.
9. Write a paragraph describing the conditions that cause dangerous mudflows. Include the types of locations where mudslides are most likely to occur.
Some conditions that a mudflow can cause is destruction of houses and lost of homes and people dying because of these mudflows. the more likely to occur in the west part of the United States.

Mass movment

1.Types of mass movement are slump and earthflow.
Example:

Bedrock: Most common are slides or falls of small blocks of bedrock that break off by enlargement of joints during weathering. Massive rockslide's or rockfalls involving much greater volumes of material are rare but are spectacular.

Soil: Mud and earth imply materials that consist mostly of clay and silt. In a mudflow there is enough water to allow the mixture to flow easily, as a viscous stream. An earthflow is slower moving than a mudflow and involves a mass of material that retains rather distinct boundaries as it moves

Water: Movements of snow and ice (snow avalanches and glacial flow) under the influence of gravity are not usually considered to be mass wasting. But sometimes snow is involved in mass-wasting events.

Plate Boundery Questions!

1. What are the first 3 types of plate boundaries listed?

Plate boundary zones

Transform boundaries

Convergent boundaries

2. What does the word divergent mean in regard to plate movement? What forces the plates to move apart at divergent boundaries?

Divergent boundaries occur along spreading centers where plates are moving apart and new crust is created by magma pushing up from the mantle.

Picture two giant conveyor belts, facing each other but slowly moving in opposite directions as they transport newly formed oceanic crust away from the ridge crest.

3. Give an example of a specific mid-ocean ridge where seafloor spreading and divergent boundaries occur. What country sits directly on top of this ridge? What are the red triangles that are shown on the map of this country?

Iceland is directly on top of the ridge. They show the mid Atlantic ridge and the Atlantic ridge.

4. What does the word convergent mean in regard to plate movement?

Collision that takes place between two plates which depends on lithosphere.

5. Find the diagrams shown on the website for each of the following kinds of plate boundaries. Label and post the three diagrams on your blog.

a. Oceanic-continental convergence-If by magic we could pull a plug and drain the Pacific Ocean, we would see a most amazing sight -- a number of long narrow, curving trenches thousands of kilometers long and 8 to 10 km deep cutting into the ocean floor.

b. Oceanic-oceanic convergence-As with oceanic-continental convergence, when two oceanic plates converge, one is usually subducted under the other, and in the process a trench is formed. The Marianas Trench (paralleling the Mariana Islands), for example, marks where the fast-moving Pacific Plate converges against the slower moving Philippine Plate.

c. Continental-continental convergence-The Himalayan mountain range dramatically demonstrates one of the most visible and spectacular consequences of plate tectonics.

6. When one plate gets pushed below another plate it is called subduction. What geologic features form on Earth’s surface directly above the subduction zone in the case of:

a. oceanic-continental convergence? Trenches are the deepest parts of the ocean floor and are created by subduction.

b. oceanic-oceanic convergence? In turn, the overriding South American Plate is being lifted up, creating the towering Andes mountains, the backbone of the continent.

c. continental-continental convergence? When two continents meet head-on, neither is subducted because the continental rocks are relatively light and, like two colliding icebergs, resist downward motion.

7. What is a transform boundary? What geological disturbance is caused along transform boundaries? Where in North America is there an example of this type of plate boundary? The zone between two plates sliding horizontally past one another is called a transform-fault boundary, or simply a transform boundary. Most transform faults are found on the ocean floor. San Andreas fault zone in California

8. Using the Internet and a focused search, identify the type of plate interaction that caused the following features:

a. Mid-Atlantic Ridge- Is a mid-ocean ridge, a divergent tectonic plate boundary located along the floor of the Atlantic Ocean, and the longest mountain range in the world.

b. Kuril Trench- Is an oceanic trench with a maximum depth of 10,542 meters (34,000 ft).

c. Phillipine Islands- Is an island that has trenches around it.

d. East African Rift Valley- Is an active continental rift zone in eastern Africa that appears to be a developing divergent tectonic plate boundary

e. Red Sea- A long, narrow, landlocked sea that separates Africa from the Arabian peninsula. It is linked to the Indian Ocean in the south by the Gulf of Aden and to the Mediterranean Sea in the north by the Suez Canal.

f. Peru-Chile Trench- Also known as the Atacama Trench, is an oceanic trench in the eastern Pacific Ocean, about 160 kilometers (100 mi) off the coast of Peru and Chile.

g. Aleutian Islands- A chain of U.S. volcanic islands that extend southwest from the Alaska Peninsula.

Geologic Timeline: Fallow-Up Questions

1. The earth for become hard atmosphere fill with oxygen oceans to form. I think what things had to happen before life could be sustained. So in order for animals and human life to take hold, the earth would have to be able to hold them, it would have to be born and have a crust, it would have to have an atmosphere and water and food
2. That is most important in the terms of the earths crust and oceans and the atmosphere. It is one of the biggest peice in geologic time and most important.
3. Yes it is very significant.

This is a nintendo 64 and It is a rock fossil.

This is a star fossil and its in the shape of a rock.

Homework

Due Friday, 09/18

• Read the text, pages 650-654
  
• On your blog, make a post in which you put the following events in sequence:
• Bob graduates from high school
• Bob loses his first tooth
• Bob is born
• Bob is tall enough to ride the roller coaster
• Bob gets his driver’s license
• Bob gets married
• Bob joins the Marines
• Bob starts middle school
• Now answer the following questions in your blog post:
• Were there any events that could have gone in different order?  Which ones?
• How long ago was Bob born?

     

bob is born

bob loses his first tooth

bob is tall enough to ride the roller coster

bob starts middle school

bob gets his drivers licenses 

bob graduates from high school

bob joins the marines

bob gets married

bob and his first tooth and bob i tall enough to ride a roller coster

bob joins the marines and bob gets married

he's about 30,907,692 years old..