For the class demonstration (or each group):

• large square plastic container or small roasting tray, at least 12 x 12 x 5 inches (or more) deep
• flour to fill the container or tray to a depth of at least 4 inches (~$4 for a 5-pound bag)
• plastic Easter egg shell, such as at Party City
• 10 pennies (each penny is 2.4 g), for weight inside the plastic egg
• short ruler, 12 inches or less, including metric marks
• notecard
• materials to lay under/around the flour tray for easier cleanup,, such as a tarp, ground cloth, newspapers, butcher paper or large plastic bags
• yardstick (or meter stick)
• pile of books, bricks, or something similarly heavy, to prop up the yardstick near the flour tray
• Moon Craters Worksheet, one per student

Materials for optional activity:

• smart phone, one that you are okay dropping to the floor from a height of 2 feet
• small foam pad or padded surface on which the smart phone can fall, to reduce the risk of breaking it
• download Freefall Highscore, a smartphone app

For the entire class to share:

• graph paper and pencil, for each student
• short rulers, for graphing
• capability to project in the classroom a PowerPoint® file, Moon Crater Quizzes & Answers
• (optional) capability to show the class an online video