UNIT 07 Volcano

　　Many mountains are the result of volcanoes. A long time ago, many mountains were formed by volcanic activity. When a volcano explodes, it releases a lot of heat from the inside of the Earth. Volcanoes also release a lot of gas, steam, and ash. Because of this heat and steam, we can easily find hot springs near volcanoes. Sometimes volcanic ash covers the sky and can last a few months。

　　Select True or False

　　❶ Volcanoes release gas, steam, and ash. (T/F)

　　❷ People can find cold springs near volcanoes. (T/F)

　　❸ Only a few mountains are the result of volcanoes. (T/F)

　　More to know

　　because of

　　because of 有“因为”的意思。引导描述原因的句子。because的

　　后面接带有主语和动词的句子，而because of 可以接词或者句子。

　　··I don’t go out because of the bad weather。

　　因为天气不好，我没有出门。

　　READING COMPREHENSION

　　*Read and circle the best answer。

　　❶ What did volcanoes make a long time ago?

　　a. oceans b. mountains c. cities

　　❷ What can people easily find near volcanoes?

　　a. lakes b. rain forests c. hot springs

　　*Complete the sentence with the right answer。

　　❸ Volcanoes also release a lot of gas, steam, and 。

　　a. ash b. fresh water c. plants

　　❹ Sometimes volcanic ash covers the sky and can last a few 

　　a. hours b. days c. months

　　DESCRIBE THE PICTURE

　　*Unscramble the words in the box。

　　is exploding The volcano

　　火山正在喷发。