Unit 5 Revealing Nature Starting out & Understanding ideas 课件-2023-2024学年高二英语外研版（2019）选择性必修第一册

高中新外延选择性必修一 Unit 5 Revealing nature Starting out Understanding ideas to make known something that was previously secret or unkown 1 What do you know about these animals? What makes them special? 2 What other similar animals do you know about? Share your knowledge with the class. Look at the page from a science magazine and answer the questions. Komodo dragons were first encountered by Western researchers 1910. The researcher said the ancestor of the Komodo dragon most likely evolved in Australia and spread westward, reaching the Indonesia island of Flores 900,000 years ago. Komodo dragons What do you know about these animals? The first scientists to examine a preserved platypus body judged it a fake in the late 18th century. The oldest discovered fossil of the modern platypus dates back to about 100,000 years ago. Duck-billed platypus What do you know about these animals? Fossil records indicate that the nautilus has survived relatively unchanged for around 500 million years. It is often considered a “living fossil”. Nautilus What do you know about these animals? Watch and answer 1 How can seeds travel? How can this benefit plants? Watch and answer 1 How can seeds travel? How can this benefit plants? Seeds cane travel great distances by being carried by the _ , upon the _, _ or _. wind water animals people Watch and answer Seeds have a _(better/worse) chance at life when they are _(closer/further) away from their parent plant. Growing too _(far/close) to the parent plant means seeds might not get enough _, _ and nutrients from the _. A species is _(more/less) likely to _ if its members are more _(closely/widely) spread. better further close sun water soil more survive widely 1 How can seeds travel? How can this benefit plants? Watch and answer 2 Can you think of another example of seeds travelling? 凤仙花属某种(Impatiens sp) dandelion Learning objectives To get the general idea and detailed information of the text To comb Darwin's journey of discovery according to the se