Click on the 3 questions below and for each of the different types of weathering, write a short paragraph to desribe how it breaks down rocks.

Some of these keywords could be useful:

• Freeze-Thaw
• Roots
• Biological
• Carbon Dioxide
• Ice
• Carbonic acid
  
• Acid rain
• Onion-skin
• weathering
• Erosion
• Physical
• Chemical
• Dissolve
• Expand

Read this passage and answer the questions below.

Over millions of years rocks are formed and slowly destroyed by enormous, but very slowly acting forces.  Rock fragments are weathered from the highest mountains often due to expansion in water as it freezes.  These fragments are then transported either by falling down cliff faces or by fast moving streams - either way garvity is involved.  As fragments are transported, they bounce off other rocks and become more rounded.

The larger fragments only get carried by the fastest flowing streams and soon drop to the bottom.  Smaller fragments can reach estuaries and even the open sea, where they drop to the bottom and form a layer of sediment.  This begins the process of forming new sedimentary rocks, which may contain fossils.

These new rocks can be forced upwards again as the Earth's crust moves and land masses collide.  Mount Everest, the highest mountain Earth, was once at the bottom of the sea and fossils can be found there.

Make sure you've read and understood this info - then try the questions below.  Try to answer all questions as a sentance rather than just 1 word.   Once you've finished your answer to a question, click the box to say you're finished and click 'save' to make sure you don't lose your work!

Here are the answers to some questions about Roks and Weathering... but what could the questions could have been?  There are lots of possible questions you could write, so don't worry about getting the right question - Try to write a question that will challenge everyone else ion the class!