No, not cockroaches and ants. These bugs are tiny, single-celled bacteria you can’t see. They blanket your skin. They also fill your stomach, intestines, lungs and mouth.
Don’t worry about being less than human, though. Bacterial cells are very small. All of these bugs make up only between 1 and 3 percent of your body weight.
Short and sweet overview of rocks and minerals. I can see the students researching to build a better background of what silicate/non-silicate refers to and then apply that knowledge to sorting minerals. Could be used as Enrichment.
This a fascinating article about the Cascadian fault line. Scientists track evidence of past earthquakes along the fault. Relates to Japan's tsunami. Lots of good vocabulary