Chewing these lightly abrasive, hard foods rubs plaque and stains off the surface of teeth, says Dr. Matthew Messina, a spokesperson for the American Dental Association. Pop a few almonds for a mid-afternoon snackâthey're full of protein, healthy fats, and the crunch you need to get pearly whites. Charles Masters.
As this happened, a cycle of events began to be put into place that causes changes in the rocks that exist on the earth. This cycle is known as the rock cycle. The rock cycle is a model used to describe the creation, alteration, and destruction of the rocks that form from magma. It is important to note that new matter is never created on the earth. All the matter that the earth contains was present when the earth formed and still is here today.
The Rock Cycle According to the Law of Conservation of Mass, matter cannot be created or destroyed. It only changes form. The same is true about rocks! The Law of Conservation The Rock Cycle Weathering A natural process that causes rocks to change, break down, and make crumble Two different types of weathering Physical Weathering Break rocks into smaller pieces Chemical Weathering Changing material into a new substance Erosion The wearing away and removal of material Main Agent of Erosion is: Water (H2O)