Rock Fall in Yosemite

In science this week, we asked the question, will a mountain last forever? After some experimenting with sugar cubes (ask your child about this), we discovered that the answer is NO, a mountain will not last forever. We learned that ice wedging and root wedging can cause rocks to break apart over time. Rocks can change shape after falling and dealing with moving water, making rocks at the top of a mountain significantly different from rocks at the bottom. The next time you’re at a rushing river full of rocks, take a look at their shape and notice how smooth the water has made them. In the meantime, check out the following video which provides excellent evidence of rockfall in Yosemite National Park.