Thursday, April 26th

Read pages 28-39 in the Inside Earth book silentlyToday you Need:

Pen/Pencil YNT sheet Science

Notebook Inside Earth

book Scissors/glue

stick

Drifting Continents

I will understand that the continents move and what causes them to move.

1. Describe Wegener’s hypothesis (be sure to include the words landmass, Pangaea, and continent)

2. Define continental drift3. What evidence was there to confirm Wegener’s theory?

(hint: you should include 3 different pieces of information)4. Cut out the puzzle pieces from the YNT sheet. Put the

puzzle together and paste it in your notebook.5. Why was Wegener’s theory rejected?6. Define mid-ocean ridge7. What radical idea did American geologist Harry Hess

propose?8. “At the mid-ocean ridge…”9. Define sea-floor spreading10.What evidence is there to suggest that sea-floor spreading

does indeed happen? (once again, we’re looking for 3 things here)

11.Define subduction12.Draw and label the picture on page 38 that shows the

effect of sea-floor spreading and subduction