5. Read the definitions and fill in the blanks using the words in exercise 1. is the sudden explosion of volcanic material. is the sudden violent movement of Earth's surface. 2. 3. 4. 6. 7. 8. 1. *** is a large amount of snow falling quickly down the side of a mountain is a mass of rock and soil moving suddenly and quickly. is a large amount of water beyond its normal limits. is a storm that moves over water. is a long period when there is little or no rain. is an extremely large wave after an earthquake.​