MER Athena site http://athena.cornell.edu/educators/lp_10.html
The RAT is an instrument on the Mars Exploration Rovers. Students learn to make scientifc observations using a Rock Abrasion Tool (RAT) with a fig bar, Mars dust (cinnamon sugar), and pretzel rod RAT.
variety of flavors of fig bar cookies, paper muffin cup, cinnamon sugar mixture, pretzel rods, craft sticks, rulers, pencils, student worksheet
WHAT'S UP IN THE SKY?