1. If the whole earth is
covered by plates that move in different directions,
how can they
even move at all?

2. Where do most volcanoes occur?

3. Story time…

4. A topographic map shows ‘relief’ features (or elevation) of a land area. This can be done with contour lines or color.

6. Bathymetry shows the ‘floors’ of water bodies such as oceans, rivers, streams and lakes.

8. The grey areas in the image show land above the water level.
What does this image show you about the Hawaiian Islands?
Where is the oldest rock of the islands? Where is the youngest rock of the islands? How do you know?

10. How deep is the ocean?

11. This map shows continental crust from parts of North and South America on the left. Parts of Europe and Africa can be seen on the right. In between part of the oceanic crust known as the Mid-Atlantic Ridge can be seen.

12. Seafloor Data Analysis

14. Time out for some data analysis.

16. Mid-Ocean Ridges

17. Trenches and More Trenches

18. 1. Is the oceanic crust being
created at the same rate it is
being subducted?
3. In the Atlantic Ocean,
the opposite is true—
new crust is being
made faster than it is
being subducted.
2. In the Pacific Ocean,
the sea floor is being
subducted faster than
it is being created.
4. Based on this information,
what will happen to the
Pacific and Atlantic oceans
over a long period of time?