高中英語外研版（2019）選擇性必修第一冊 Unit 5 Revealing nature-Starting out課件共11張PPT

1、Revealing NatureKomodo dragon:(科莫多巨晰）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 Flores 900,000 years ago.The Komodo dragon is the

2、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（鴨嘴獸） The first scientists to examine a preserved platypus body judged it a fake in th

3、e late 18th century. The oldest discovered fossil of the modern platypus dates back to about 100,000 years ago. The duck-billed platypus is a small egg-laying mammal (up to 60 cm in length) found only in Eastern Australia including Tasmania. As its name suggests, it has a mouth that looks like a duc

4、ks bill, while its thick fur and flat tail are similar to those of a beaver（海貍）.Nautilus（鸚鵡螺）Fossil records indicate that the nautilus has survived relatively unchanged for around 500 million years. That is why it is often given the name “l(fā)iving fossil.”1. What do you know about these animals? What

5、makes them special?They are all species that exit _ _years on earth; They are _ and _2. What other similar animals do you know about? Share your knowledge with the class.thousandsofoldrare/unusualHow seeds travel?V 傳播，移動How can seeds travel? Seeds cane travel great distances by being carried by the

6、_ , upon the _, _ or _.windwateranimalspeople2. How can this benefit plants?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

7、 _(more/less) likely to _ if its members are more _(closely/widely) spread.betterfurtherclosesunwatersoilmoresurvivewidelyExampleCarried byFeatureHowMaple seedsWings that _ and keep them in the _ for _, allowing them to _ in all kinds of placesDepending on the _ of the wind, they can sometimes trave

8、l for _ _ kilometersCoconutsIts _ shell allows it to _ on the water for a long time.When a coconut _from a tree onto the beach, the sea _ it _ and carries it away to _somewhere elseCherry Many plants _ fleshy fruits that animals like to _Animals _especially _, so the seeds can easily end up a _way f

9、rom the parent plant.ExampleCarried byFeatureHowMaple seedsWings that _ and keep them in the _ for _, allowing them to _ in all kinds of placesDepending on the _ of the wind, they can sometimes travel for _ _ kilometersCoconutsIts _ shell allows it to _ on the water for a long time.When a coconut _from a tree onto the beach, the sea _ it _ and carries it away to _somewhere elseCherry Many plants _ fleshy fruits that animals like to _Animals _especially _, so the seeds can ea