After both groups are done, combine to make one group. Discuss and write up the results from each group. Add results from each group together so that you have statistics for 100 trials. Ask students to analyze the data and compare the experimental results with their predictions. Students could research the actual percentages of land and water on Earth.
Students compare their experimental results with the actual percentages of land and water.
Wait for a show of hands. Discuss why or why not. Compare with earlier count. PLAY and STOP at the end of the segment of the asteroid hitting earth. They should describe the situation and then advise viewers on the possibility of an asteroid hitting a house.