Unit 4 Section B (3a-3c) 课件 2025-2026学年人教版英语八年级上册

汾秀中学 陈慧琴 探究课 Section B 3a-3c Unit4 Amazing Plants and Animals SectionB 3a-3c Almost 71% of the surface(表面) is covered by the blue . sea explorer Let's go to the bottom of the ocean! They are huge animals. They live in the sea. They can sing songs. They can jump high out of water. They are clever and friendly. whales What do you know about whales? Let’s guess Let's watch What do you know about the blue whale? marine mammal biggest animal Place: deep ocean Food: krill（磷虾） ... 861b240d-cd4e-4b4b-87c2-161e8c2fa4ea.source.default.zh-Hans 6 Let’s read for the main idea and type It’s about the blue whale. 1. What’s the article about? Tip1：the title and the picture help to know the main idea of the article 2. What type of article is it? A. narrative (记叙文) B. story C. exposition (说明文) people like watching blue whales swim The blue whale is the largest and heaviest animal on earth. It can weigh as much as 200 tons. Many people like watching blue whales swim, and they think it is one of the most beautiful things to see. Blue whales live in all oceans except the Arctic Ocean . They eat a lot, but they eat some of the tiniest animals in the ocean. A blue whale can eat around four tons of these a day. Blue whales can live up to 90 years. When a blue whale dies at sea, it becomes food for many kinds of animals living in and around the sea. This food lasts for over a year and it helps to create a lively and healthy ecosystem. Blue whales play an important role in our world, so we must protect them. Blue whale facts Weight Where they live Food How long they live Role in ecosystem as much as 200 tons in all oceans except the Arctic Ocean Someof the tiniest animals in the ocean. They can live up to 90 years. It helps to create a lively and healthy ecosystem. Let’s read for details What's the structure of the text ? Protection call呼吁保护 importance in nature facts（地位、重量、栖息地、食物、寿命） Pre-writing people's opinion Step 1 找人称 Step 2 换人称 Step 3 句子对比 Step 4 填充内容 Step 5 整合内容 While-writing Step 1 找人称 While-writing Step 2 换人称 I am I me I am I I I I 注意： 主、谓、宾一致 I I I become I you me die 3c the largest and heaviest animal on earth. I can weigh as much as 200 tons. Many people like watching me swim, ? all oceans except the Arctic Ocean. I eat a lot, but I eat some of the tiniest animals in the ocean. ? around four tons of these a day. Step 4、5 填充、整合内容 while-writing swimming, some of the tiniest animals in the ocean. Further Thinking Why do we protect blue whales ? They play an important role in marine ecosystems, they help to create a lively and healthy ecosystem. 一鲸落，万物生。 Let’s talk What can we do to protect the blue whale? Make rules to protect whales. Stop hunting whales. Stop putting rubbish into the sea If you are blue whales, can you introduce yourselves ? Let’s talk What do you know about the blue whale? food lifespan weight/size habitat (栖息地) importance protection Make a poster to introduce your favourite marine animals. Part1: some interesting facts about animals Part2: protection measures Facts: weight/size, habitat（栖息地），Food, Lifespan（寿命）, the important role in the ecosystem Protection: Group work It's your turn! the Blue Whale the dolphin the shark the frogs Work in groups of six to make a poster . Checklist Standard ⭐ ⭐ ⭐ ⭐⭐⭐ Handwriting beautiful writing and painting Correct Language without grammar mistakes Content fully introduction with given information The Dolphin Dolphins are smart and friendly animals that live in water. They are not fish—they are mammals, just like humans. An adult dolphin can be about 2 to 4 meters long and weigh 100 to 200 kilograms. Many people love watching dolphins jump out of the water; it looks very amazing. Dolphins live in oceans all over the world, and some even live in fresh rivers. They eat fish, squid and other small sea animals. Every day, they need to eat a lot to stay active. Dolphins can live for 20 to 50 years. They are social animals and often live in groups. Dolphins play an important role in the ocean ecosystem—they help control the number of fish and keep the sea balanced. Some dolphin species are in danger now, so we must protect them and their homes. facts Weight/Size Where they live Food Lifespan(寿命） Role in ecosystem Protection The Frog Frogs are small amphibians with slim bodies and long legs. They are very good at jumping. A common frog is usually 8 to 13 centimeters long and weighs about 22 grams. Frogs are easy to see in gardens, ponds or wetlands. They can live in water and on land. When spring comes, they lay eggs in ponds. Frogs eat insects, slugs and small invertebrates—they are helpful to farmers because they eat pests. A frog’s lifespan is about 3 to 15 years. In winter, they hibernate in mud or under logs to stay warm. Frogs play an important role in our ecosystem: they help to protect farms by eating insects.We should protect their habitats, so frogs can live safely. facts Weight/Size Where they live Food Lifespan(寿命） Role in ecosystem Protection The Shark Sharks are amazing sea animals that have lived on Earth for a very long time. They are one of the largest predators in the ocean. Most sharks are about 2 meters long, but some big ones can be much longer. Their weight varies a lot—small sharks weigh a few kilograms, while large ones can be over 20 tons. Sharks live in all oceans of the world, and some can even live in fresh water. They eat fish, other sea animals, and some eat tiny plankton. Unlike what movies show, most sharks are not dangerous to humans. Sharks can live for 20 to 100 years. They play a key role in the ocean ecosystem: they eat sick fish and keep the sea clean and balanced. Many shark species are now endangered because of overfishing. We must stop hurting sharks and protect their living environment. facts Weight/Size Where they live Food Lifespan(寿命） Role in ecosystem Protection Save animals， save our future！ Homework Must-do: make a poster about the marine animals to help others know them better. Choose-to-do: try to search more information about them and make a video to introduce them. Thanks for listening ! Lavf58.46.101 Lavf60.16.100 $