Unit 5 Revealing nature Starting out 课件-2025-2026学年高中英语外研版（2019）选择性必修第一册

该高中英语课件围绕“Revealing nature”主题，涵盖动物特征（如老虎、蝴蝶、“活化石”鹦鹉螺）、种子传播方式（风力、水力、动物携带等）及生态保护知识，通过主题提问（如标题含义探讨）、动物案例分析和种子传播视频观看，构建从主题理解到实例应用的学习支架。 其亮点在于跨学科整合生物与英语学习，通过互动问答（如动物知识分享）、视频活动（种子传播机制探究）和词汇拓展（如“lynx”词源学习），提升语言能力与思维品质。学生在讨论濒危动物保护、分析“活化石”特征中增强环保意识，教师可借助多样活动提高课堂互动性与教学效率。

B4U5 Revealing nature Starting out FREE TALK What animals are you interested in? Group work. Discuss the animals you are interested in. Dolphins: The "Intelligent Social Butterflies" of the Sea They have high emotional intelligence. They form close-knit groups (called pods) and even help injured members or other species, like rescuing humans. They use complex communication. Dolphins make clicks, whistles, and body language to "talk"—scientists think their "language" is more sophisticated than many animals. Tigers (from "Mammals" in Vertebrates) Tigers are such powerful and majestic mammals. I’m amazed by how they’re top predators in their habitats, with their beautiful striped coats that help them camouflage when hunting. Also, it’s sad but important to talk about how they’re endangered, so learning about tiger conservation feels meaningful. Butterflies (from "With 3 pairs of legs" in Invertebrates) Butterflies are so fascinating because of their life cycle—from caterpillar to chrysalis to the colorful adult butterfly. Their wings have such intricate patterns, and they play a huge role in pollination, which is vital for many plants. It’s cool how something so delicate can be so important for nature. What do you think the title “Revealing nature”means? reveal: to make known something that was reviously secret or unknown. nature n. 自然，自然界 n. 本质；特性 “Revealing nature” likely means uncovering, exploring, and making known the various aspects of the natural world. This could involve discovering how different natural phenomena work, understanding the secrets of plant and animal life (like how seeds travel, as we talked about earlier, or how animals are classified), delving into the interactions within ecosystems, or bringing to light the beauty, complexity, and hidden mechanisms that exist in nature. It’s about peeling back the layers to gain a deeper insight into the natural environment around us. Revealing nature What do you expect from the title? How much do you know about nature? Man selects only for his own good; nature only for that of the being which she tends. ---- Charles Darwin Look deep into the nature, and then you will understand everything better. ---- Albert Einstein reveal: to make known something that was previously secret or unknown Activity 1 Look at the page from a science magazine and answer the questions. 1. What do you know about these animals? The Komodo dragon 科莫多巨蜥 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. The Duck-billed platypus 鸭嘴兽 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 duck's bill, while its thick fur and flat tail are similar to those of a beaver. Nautilus 鹦鹉螺 As one of the oldest sea animals in the world, the nautilus has hardly changed in about 500million years, and that is why it is often given the name “living fossil”. 2. What other similar animals do you know about? Share your knowledge with the class. Pangolin Golden monkey Lynx山猫，猞猁 来自拉丁语lynx词源同light因该猫科动物在黑暗中发光的眼睛而得名 Lingula海豆芽，舌形贝广泛分布在世界各处海洋中，也可以成为“活化石” Watch the video and answer the questions. After-viewing Seeds Traveling ① by itself ② by the wind ③ by the water ⑤ by the animals ⑥ by the insects ④ by the birds 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 Thank you Multimedia Cloud Transcode (cloud.baidu.com) Lavf58.20.100 Lavf56.40.101 Tencent APD MTS $