Jonathan worked on the concept of a tsunami today. He learned that the word means Harbour Wave in Japanese. Jonathan watched a video which explained that the tsunami is started by a volcano or earthquake coming from the ocean floor. He learned that the wave is barely perceptible out at sea because the water is so deep, but when the wave comes to shore, the lower part of the wave hits the sloping bottom leading to the shore. This makes the water mount up like a tall building. The tsunami shows its size and power when it approaches the harbor or the beach. Jonathan watched an animation of the way the wave is formed. He drew a picture of the tsunami and labeled the part. Jonathan was also interested in water erosion as seen in the Grand Canyon. He learned that Kaibab is the name given to the Grand Canyon many years ago by the Paiute Indians. The name means " mountain lying on its side." Jonathan learned that the Grand Canyon was once a mountain many millions of years ago. He watch the cartoon animation that showed how the mountain sank into the Earth and water from far off sources began to flow in the valley that it formed. Jonathan knew that the river in the Grand Canyon is the Colorado. He also made a drawing of the Grand Canyon and labeled important parts. Jonathan learned abouth the Great Dust Bowl. He watched a video made from rare footage taken during the 1930's when the sandstorms would not stop. This problem was blamed on manmade choices of over farming the same crop and making the soil depleted and dry. Jonathan is enjoying the adventures that the study of weathering is bringing.