Students weigh a small plastic bead to determine the effect mass has upon crater diameter.	Students work in pairs to measure the diameter of the impact crater made by dropping a small bead into a tray of sand.
Pupils examine stereograms of craters on Mars and on the Earth's moon.	Teams of students worked together to determine the effect velocity has on the size of an impact crater.
Groups enter their data on a chart.	Mrs. Stevens' eighth grade Earth Science class watches the live broadcast of "Countdown." We were very excited when one of our questions was answered on the program.
During the broadcast of "Countdown" students sent in questions to be answered by NASA scientists.	Taylor Road Middle School students sent in questions before the live broadcast to be answered on air.