You probably already know a lot about minerals and rocks 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 minerals and rocks. 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 minerals and rocks. 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. Coal is an example of a common mineral. (Agree / Disagree)
   
   
2. The hardness of a mineral is a measure of the ease with which the surface of a material can be scratched by that mineral. (Agree / Disagree)
   
   
3. The Earth's interior is the original source material for all rocks on the Earth's surface. (Agree / Disagree)
   
   
4. Rocks, once they have been formed, usually remain fixed in form over time. (Agree / Disagree)
   
   
5. Marble is produced from the transformation of limestone. (Agree / Disagree)
   
   
6. Acid rain can cause significant chemical weathering. (Agree / Disagree)
   
   
7. Climate is not a major factor in the rate of weathering. (Agree / Disagree)
   
   
8. Soil is a major product of weathering. (Agree / Disagree)