Unit 6 Forces That Change the Earth Review

Unit 6 Forces that Change the Earth Review

Fill in the chart.

Fill in the chart.

Fill in the blank using the word bank below. Words may be used more than once.

1. New crust is found at ______boundaries.
2. ______on the ocean floor, supported sea floor spreading by showing that the crust is newer near the ridge and older at subduction zones.
3. Rocks are distorted and deformed when sliding past each other at ______boundaries.
4. ______of identical species that are now separated by oceans supported the theory of Continental Drift and Pangea.
5. Old crust is destroyed at ______boundaries.
6. Volcanic islands that occur at convergent boundaries are ______.
7. Volcanoes are also found at ______boundaries.
8. Folded mountains are produced when two pieces of continental crust collide at ______boundaries.
9. Subduction zones occur at ______boundaries.
10. ______currents in the lower mantle and asthenosphere move tectonic plates.
11. Plates that build up tension and then release causing an earthquake, move because of ______forces.
12. New crust is created at ______boundaries.
13. Magma ______occurs during the process of sea-floor spreading, filling in new crust along the mid-ocean ridge.

Use the diagram to answer the questions.

In feet

1. What is the change in elevation from X to Y? ______
2. What is the structure on the right marked by the hatched contour lines? ______

______

1. What is the correct name for the hatched contour lines? ______
2. What slope is indicated when contour lines are close together? ______
3. A gentle slope is indicated by placing contour lines ______.
4. The lines on a topographic map are called ______.
5. If the hill is weathered and eroded over time becoming more rounded, how will the contour lines on future maps change?
6. Bob is at W but wants to get to the highest point. How much higher does he need to climb?
7. Draw the profile of the land shown in the topographic map above.

This is a satellite picture of an extinct volcano. The caldera is clearly visible. Write a short paragraph (4 sentences) explaining how the volcano will change over time due to erosion and weathering.

Paragraph:

______

Calculations:

1. A small tectonic plate with a mass of 7.5 billion kg and an acceleration of .0001m/s2would collide with another plate with what force?

1. Lava with a mass of 1500 kg is flowing at an acceleration of .5 m/s2. With how much force would it strike the manmade structures in its path?