Match the words to form phrases and use the phrases to complete the sentences.

1. hydro-electric power, 2. powerful storms, 3. mountain range, 4. make up, 5. volcanic activity, 6. famous sight. Sentences: 1) Every year, many powerful storms form out in the Pacific Ocean. 2) There is a lot of volcanic activity in the Pacific Ocean. Islands such as Hawaii and Tonga have lots of volcanos on them. 3) Niagara Falls is a very famous sight in North America. 4) Niagara Falls is the largest producer of hydro-electric power in the world. 5) The Mid-Atlantic Ridge is a mountain range under the Atlantic Ocean. 6) Five major oceans make up most of our planet.