You probably already know a lot about the movement of continents from your own general knowledge. You may have picked up this background from your own reading, from TV, from movies, or from other areas. Below you will find a series of statements concerning the movement of continents. Not all of them of them are true. All of the concepts in the statements will be fully explored in the lessons, but before you review the lessons, let's see what you already know about the movement of continents. Carefully think about each statement. Then decide, to the best of your knowledge, whether you agree or disagree with each statement. At the end of the unit, you'll be able to review these statements again to see how much you have learned.

1. The Earth's present-day continents were originally part of one gigantic supercontinent called Pangaea that existed over 200 million years ago. (Agree / Disagree)
   
   
2. The theory that continents moved over time, known as continental drift, was immediately accepted by scientists when it was proposed in 1912. (Agree / Disagree)
   
   
3. Coal, which forms in swampy, tropical areas, has never been found in Antarctica. (Agree / Disagree)
   
   
4. A large oceanic mountain chain with a narrow valley down its center extends through the length of the entire Atlantic Ocean. (Agree / Disagree)
   
   
5. The age of the ocean floor is about the same as the age of continents. (Agree / Disagree)
   
   
6. The Earth's North and South magnetic poles have reversed themselves many times in the Earth's past. (Agree / Disagree)
   
   
7. The upper surface of the Earth is broken up into a number of large chunks of rigid material known as plates. (Agree / Disagree)
   
   
8. Continents move because of convection currents from deep within the Earth. (Agree / Disagree)