Unit 6 The Earth’s Atmosphere

1. the ship is made from waste materials. the t-shirt is made of cotton. 例如： ① the book is made of paper and paper is made from wood. ② the glass is made of glass and glass is made from sio2. 2. the air that surrounds the earth is called the atmosphere. 包圍地球的空氣被稱為大氣。 be called  被稱為 同義詞：be named 例如： the boy is called “da niu” by his classmates. the machine is called “washing machine”. that city will be called “water city”. 3. it surrounds the earth like a blanket—20 miles thick. 20 miles thick  20英里厚 數字+單位+形容詞 例如： 1.7 metres tall  一米七高 6 metres wide  六米寬 20 kilometres away 20公里遠 ① our classroom is three metres tall, 7 metres long and 6 metres wide. ② the yellow river is 5000 kilometres long. it is the second longest river in china. ③ the river is about 20 metres deep. you mustn’t swim in it. it’s too dangerous!   【典型例題】① the ruler is            （20厘米長）. ② the book is              （5厘米厚）. ③ the hole is about          （50米深）. ④ the tree is nearly          （36米高）. 4. the atmosphere protects the earth from the sun’s heat. protect…from  保護……免遭 例如： ① the thick coat protects the body from the cold. ② the helmet protects the head from the rock. ③ the plastic cover protects the book from being broken. 5. nothing could remain alive on the earth without the atmosphere to protect up. plants depend on nitrogen to stay alive. ① remain alive  存活  stay alive  存活 例如： remain silent                 stay calm remain standing             stay awake remain the goal              stay cool remain weak                 stay quiet ② depend on  依靠，依賴  例如： the people in the south depend on the government. the pandas depend on our good care. you can’t depend on your parents forever.   【典型例題】① the success of the olympic game           （依賴）chinese people’s hard work. ② the poor children           （依靠）those rich people’s support. 6. the air in the atmosphere is made up of dust and gases. be made up of   由……構成，由……組成 例如： the class is made up of 20 boys and 19 girls. the teacher team is made up of 126 teachers. 7. more than three—fourths of the gas is nitrogen. three—fourths  四分之三 分數的概念： 分數由基數詞作分子，序數詞作分母構成，分母序數詞都用復數。 例如： →one-third                      →six-sevenths →one-second (one half)    →two and four-fifths 8. people who travel to the mountains find it harder to breathe. sb. find it + adj. + to do sth.  某人發現做某事怎么樣 例如： i find it very interesting to travel to the forest. the boys find it very cool to smoke.   【典型例題】