Students re-examine the images of the Martian craters to see if their modeling experience gives them additional insights. Students write a plan to test one of the hypotheses and carry out their investigation. Finally, students apply their modeling experiences by making several inferences. Key Concepts Impact craters are caused when a bolide collides with a planet. A crater's size and features depend on the mass and velocity of the bolide.
Impact craters provide insights into the age and geology of a plant's surface.
The Martian surface contains thousands of impact craters because, unlike Earth, Mars has a stable crust, low erosion rate, and no active sources so lava. So, impact craters on Mars are not obliterated as they are on Earth. Sieve, large spoon or cheese cloth to sprinkle the dark powder Meter stick or string to measure the two-meter dropping height Balance Card or ruler to smooth the surface of the powder Newspaper or drop clothes Large sheets of paper to record ideas from the class discussions.