Step 1: Visible Craters The first few craters you’ll visit are nice, round, and easy to spot. Find each one and then describe them in the table. Remember to select the crater name. Crater Description Lonar Crater, India (Asia) Roter Kamm Crater, Namibia (Africa) Gosses Bluff Crater, Northern Territory (Australia) 1. What similarities do these craters have? Step 2: Invisible Craters Some of the craters on Earth are not very visible. They have been covered by water or eroded over time. Special kinds of maps called gravity maps can tell you more about these hidden craters. Select the name of the crater to see these maps. Crater Description How is it hidden? Chesapeake Bay, United States (North America) Chicxulub Crater, Mexico (North America) Morokweng Crater, South Africa (Africa) Step 3: Young Craters Not all craters are the same age. For a long time during the early formation of the solar system, meteorites bombarded Earth. Take a look at some of the younger craters. Find each one and then describe them in the table. Remember to select the crater name. Crater Age Description Kaalijärv Crater, Estonia (Europe) 4,000 years old Wolfe Creek Crater, Western Australia (Australia) 300,000 years old Step 4: Old Craters The oldest craters on Earth are also some of the largest. You may have to zoom out on your map to see the whole crater. Be sure to click the name of the crater, too. Crater Age Description Sudbury Basin, Ontario, Canada (North America) 1,850,000 years old Vredefort Crater, South Africa (Africa) 2,023,000,000 years old 2. What differences did you notice between the old and young craters? Step 5: Odd-Shaped Craters Although each famous crater looks different, they have the same basic circular shape. Visit the Rio Cuarto craters in Argentina (South America). Zoom in to see these oval-shaped craters. 3. What is the controversy surrounding these craters? What do you think? Step 6: Tourist’s Choice! You have seen a lot of craters! Now it’s your turn to choose a crater to visit. Select any continent and any famous crater. Describe your crater. Is it old or young? Visible or invisible? Is it dry as the desert or filled with water? 4. Which crater (or craters) did you visit? 5. Describe your crater’s age, size, and appearance.