Unit 5 Developing ideas 课件-2022-2023学年高中英语外研版（2019）选择性必修第四册

UNIT 5　 Into the unknown --- Developing ideas 1. Students could learn some words and phrases. 2. Students could get the main idea of this passage. 3. Students could write sentences about this unit. Learning Aims: 下潜很深 Diving Deep What is your understanding of this title？ Share with others Brainstorming: Before learning this grammar, what ideas come to your mind? 1. fish 2. biue sea 3. ... Look at the sentences and answer the questions. 1. What different zones are there in the ocean? Sunlight Zone, Twilight Zone, Midnight Zone and Abyssal Zone. Look at the sentences and answer the questions. 2. Which parts of the ocean do you think have been explored? Sunlight Zone, Twilight Zone. Look at the sentences and answer the questions. 3. What do you know about the deepest part of the ocean? It is Abyssal Zone. What has been discovered in the ocean depths? Shipwrecks of the Esmeralda, ruins of ancient cities and the substance known as “fire ice” have been discovered in the ocean depths. Shipwrecks such as that of the Esmeralda. What has been discovered in the ocean depths? 1 Lying under waters across the globe are an estimated three million shipwrecks. All of them represent attempts over the centuries to explore Earth’s furthest corners. Among these is the Esmeralda, the earliest wreck from the age of the European exploration of Asia. Today, some 500 years after the Esmeralda set sail, there is little – if any – land on our planet left unexplored. We have more detailed maps of the Moon, and even of Venus and Mars, than we do of Earth’s own sea bed. Take notes quickly！ 重点词汇 shipwrecks 船舶失事 ; 海难 ; furthest 最远的 ; 最大限度地 Esmeralda 埃斯梅拉达 wreck 沉船 ; if any 如果有的话；即便要 unexplored 无人涉足的 ; sea bed 海底;海床 Ruins of ancient cities like Neapolis. 2 Given our limited knowledge, it is perhaps no surprise that exploration of the oceans continues to lead to discoveries in various scientific fields. As with the discovery of the Esmeralda, many archaeological finds are made in sh