yTeach Blog Assignment for

Please complete the yTeach lesson found at this link: Floating Bodies.

As you complete the lesson, answer the following questions and post your answers as a comment to this blog. Some of the yTeach lesson is a little bit above your grade level, but be patient and rewatch the movies if you need to, or look up words if you need to.

1. kg m-3 means "kilograms per cubic meter" and is a way of representing density similar to "grams per milliliter" or "grams per cubic centimeter". On the second yteach page, you are shown the densities of different objects, and the densities of different liquids. Under what conditions will the objects float?

2. What is Archimedes principle according to the video on page 3 of the yTeach lesson?

3. According to the video on page 4 of the yTeach lesson, what is the importance of the weight of the water displaced by an object?

4. On page 5B of the yTeach lesson, what is the volume of the cuboid if 1 cubic meter (m3 is equal to 1,000,000 cubic centimeters (cm3).

5. On page 7A of the yTeach lesson, you observe the affect of salinity (salt in the water) affects ocean vessels. Under what conditions do objects float the best?

Homework for March 13th

Your homework for Friday, March 13th is as follows:

Read Chapter 6, section 1. Then answer the following questions:

1. Explain why volcanoes are commonly found at the edges of Earth's moving plates.
2. Describe what effects pyroclastic flows have on people.
3. Explain why lava cools rapidly along a mid ocean ridge.
4. Describe the process that cause Soufriere Hills volcano to erupt.
5. If the Pacific Plate stopped moving, what might happen to the Big Island of Hawaii?
6. How do volcanologists predict when a volcano is going to erupt?

Homework for Thursday, March 5th

Read chapter 5, sections 2 and 3 from your textbook, then answer the following questions:

1.  Compare and contrast the movement of rocks by primary waves, secondary waves and surface waves.

2.  Explain why surface waves cause the most damage to property.

3.  Describe what makes up most of Earth's inner core.

4.  Explain why three seismograph stations are needed to determine the location of an epicenter.

5.  Why do some seismograph stations receive both primary and secondary waves from an earthquake but other stations don't

6.  Explain how you can determine if you live in an area where an earthquake is likely to occur.

7.  Compare and contrast the Richter scale and the Mercalli scales

8.  Explain what causes a tsunami.

9.  Describe three ways an earthquake causes damage.

10.  How are shock absorbers on a car similar to the circular moorings used in modern earthquake-safe buildings?  How do they absorb shock?

Homework for Monday, March 2nd

Read Chapter 5, Section 1 from your science textbook, then answer the following questions:

1.   The Himalaya in Tibet formed when two of Earth's plates collided.   What types of faults would you expect to find in these mountains?  Explain.
2.  In what direction do rocks move above a normal fault surface?
3.  Describe how compression forces make rocks move along a reverse fault.
4.  Why is it easier to predict where an earthquake will occur than it is to predict when it will occur.
5.  Why do the chances of an earthquake increase rather than decrease as time passes since the last earthquake?  Explain.