1、教学材料：外研版高中英语新教材选修第一册教学材料：外研版高中英语新教材选修第一册教学内容：教学内容：Unit5 Revealing Nature第一课时：第一课时：Starting out执教人：执教人： REVEALING NATUREHOW DO YOU LIKE THE VIDEO?Look at the page from a sciencemagazine and answer the questions.1. What do you know about these animals?What makes them special?2. What other similar anim
2、als do you know about? Share your knowledge.Starting outKomodo dragon:(科莫多巨蜥）科莫多巨蜥）Komodo dragons were first encountered by Western researchers in 1910. The researchers said the ancestor of the Komodo dragon most likely evolved in Australia and spread westward, reaching the Indonesian island of Flor
3、es 900,000 years ago.The Komodo dragon is the largest lizard in the world. It can grow to three metres in length and can weigh about 135 kilograms. Despite its size and weight, it can run for short distances at up to 20 kilometres per hour. Duck-billed platypus: The first scientists to examine a pre
4、served 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.The Duck-billed platypusThe duck-billed platypus is a small egg-laying mammal (up to 60 cm in length) found only in Eastern Australia including Ta
5、smania. As its name suggests, it has a mouth that looks like a ducks bill, while its thick fur and flat tail are similar to those of a beaver（海狸海狸）.NautilusFossil records indicate that the nautilus has survived relatively unchanged for around 500 million years. That is why it is often given the name
6、 “living fossil.”1. What makes them special? They are all species that exist thousands of years on earth; They are old and rare (unusual).2. What other similar animals do you know about? Share your knowledge.Starting outPART2: PLANTS Watch the video and fill the blanks on your worksheetWhy do seeds
7、need to travel?Why do seeds need to travel? They need They need _._.How can the seeds travel?How can the seeds travel? Dandelion: Dandelion: Dandelions have the seeds that get_. Coconut:Coconut:coconuts are the seeds of _, which spread their seeds by letting them _ to somewhere new with the water. a
8、 place (space) to grow a place (space) to grow up up blown away by the windblown away by the windcoconut palmscoconut palmsfloatfloat2. Can you think of another example of seeds travelling? Share it with the class. Watch the video and fill the blanks on your worksheetHow can the seeds travel?How can
9、 the seeds travel? Burr: such as chestnutBurr: such as chestnutBurrs spread their seeds through the help Burrs spread their seeds through the help of _.of _.The outside of the burr is covered with The outside of the burr is covered with _ _, which enable _ _, which enable them spread the seeds when
10、the animals such them spread the seeds when the animals such as birds travel.as birds travel. Fruits such as apples and melons:Fruits such as apples and melons:When the animals eat these fruits, they carry the seeds away with their _. When they poop, the seeds _ the poop.animal helpersanimal helperstinytinyhooked structureshooked structuresstomachstomachare stuck inare stuck in Do you think our nature is in the good condition with human activity?Why should we know more about the nature?Never has it been more important to understand how the natural world works,and how to help it.
