10

Warm-up, 10.14.2009Show Mr. Benson what a transverse wave looks like. Next, demonstrate a compressional wave.

Montrez M. Benson à ce qu'une onde transversale ressemble. Après, démontrez une vague de compression.

Demuestre a Sr. Benson qué una onda transversal parece. Después, demuestre una onda de compresión.

Notes, Chapter 12The Earth’s crust is composed of a series of

plates (tectonic plates) floating on top of the liquid, molten core of the planet.

• Mid-ocean ridge: An underwater mountain created by two tectonic plates moving away from each other.

• Rift Valley: The valley created by two plates moving away from each other. Magma may emerge from these points, cycling crust upwards.

Rift Valley (African Rift Valley, East Africa)

Notes, Chapter 12

• Divergent Boundary: Where two plates are moving away from each other.

• Convergent Boundary: Where two plates are moving towards each other.

• Subduction Zone: A kind of convergent zone where two plates come together, one being pushed under the other.

• Transform Boundary: Where two plates are moving along-side each other. Faults form in these areas.

Transform Boundary

• The Alpine Fault (New Zealand)

Transform Boundary

Plate Tectonics Mini-lab• Get with a partner and take out a sheet of

paper and a book.• Fold, cut, and tape your sheet of paper to

model each of the different kinds of plate boundaries.

• Color the paper to illustrate different levels of elevation. Red = high elevation. Yellow = medium elevation. Blue = low elevation.

• Look at a map of the world and note the position of mountains.

Midterm Practice: Due Friday

P. 13, #4

P. 16 #1-2

P. 21 #1-5

P. 26 #5

P. 34, 35 all

Midterm Project (Major Project #3): Science Fair

• Requirements:– Must perform an experiment. The experiment can

be about anything you choose. Pick something you’re interested in!!!

– A science fair display. Typically a poster board displaying the steps of the scientific method you performed, as well as pictures/photos of the experiment, illustrations/graphs/charts, and various other visual aids.

• Work in pairs.

Wrap-up

• Who do you think should win a Nobel Prize? Why?