Earth Dynamics Questions

Q1:

a.What are the three main types of stress in rock?

Shearing, compression and tension.

b.How does tension changes Earth's crust?

It creates Earthquakes and that creates holes/mountains.

c.Compare the way that compression affects the crust to the way that tension affects the crust.

Tension creates mountains and compression creates holes.

Q2:

a.What is a fault?

Faults are fractures in Earth's crust.

b.Why do faults often occur along plate boundaries?

Because the forces of plate motion push or pull the crust so much that the crust breaks

c.What type of fault is formed when plated diverge, or pull apart?

Tension

d.What type of fault is formed when plates are pushed together?

Compression

Q3:

a.Name five kinds of landforms caused by plater movement.

mountains, continents, v volcanoes, islands, and fault lines

b.What are three landforms produced by compression in the crust?

Volcanoes, fold mountains and plateaus are formed by compression.

What landform is produced by tension?

Fault-block mountains and valleys are produced by tension.

Earth Dynamics

Earthquake Legend:

Orange = Strong Earthquake

Green = Medium Earthquakes

Yellow= Small earthquakes

Blue= Almost no Earthquakes

Types of stress

There are many different types of stresses for ex:

a) Tension

b) Compression

c) Shearing

Tension is something that pulls on the crust, stretching rocks so that it becomes thinner in the middle. Compression is squeezing rocks until it folds or breaks. Shearing it the stress that pushes a mass of rock in two opposite directions

Notes on Bil Nye The Science Guy (Earthquake Video)

• 1000 of earth quakes all around the planet.
• Surface of earth on liquid rock.
• Cracks called faults.
• Sizemoniters used to measure earthquakes.
• Seismic Waves.
• Tectonic plates.
• When hot makes plates move.
• Plates come together create mountains.
• Epicenter: Center of earthquake.
• 
  

Notes on Pages 24 29

Today when I read Chapter 5 section three I was astounded with all the new thing i learned for example; When an object or wave hits a surface through which it cannot pass, it bounces back. I already new this before but I was unsure of my tests. I also learned that When a wave moves from one medium into another medium at an angle, it changes speed as it enters the second medium, which causes it to bend, This was one of the most interesting things i figured out. I found this Section very interesting fun and interactive.

Interacting with Water waves

The project me and my partner (Rafa) did consists of these materials; 2 cups of water a bucket/something to store watter in, 2 board markers or something that will create a disturbance, and a notebook and pencil for analyzing the data. We first started of our project without any barriers what happen was that the watter waves just when right through each other, when we did it with two barriers it was the same except if the water wave had hit the barrier the barrier would sen the wave back were it came from. We tried the same experiment with two barriers and as expected it did the same thing.

In all I really though this test was fun because we got to make fascinating experiments.