科学1b教师用书-lesson 4 plants and us
国外小学英语科学1American Textbook Reading Science 1
American Textbook R e a d i n gScience 1Table of contents Part1 Life Science⇒ What Animals Need to Grow ⇒ Lesson 02 Life cycle of a plant⇒ Lesson 03 What plants need to grow⇒ Lesson 04 Type of animals⇒ Lesson 05 Body parts of animals⇒ Lesson 06 Where animals live⇒ Lesson 07 Land and WaterPart 2 Earth Science⇒ Lesson 08 How does Earth Change⇒ Lesson 09 Natural Resources⇒ Lesson 10 Rocks and Soil⇒ Lesson 11 Saving Natural Resources Part 3 Physical Science⇒ Lesson 12 Matter and Senses⇒ Lesson 13 Observing Matter⇒ Lesson 14 Soil Liquid Gas⇒ Lesson 15 Matter and Its ChangesKey VocabularyLesson 01 Parts of Plantstake in water and hold the plant in the soil.StemA stem carries food and water through the plant. It holds up the plant.LeafA leaf takes in light and air. Leaves help the plant get food.FlowerPlants have flowers. Flowers make fruit. Flowers are very beautiful.FruitFruit is the part of the plant with seeds. Apples and lemons are common types fruit.ReviewChoose the correct plant part for the picture.True of false Circle T for true, F for false1. A stem carries water to the pant. T / F2. A branch is a long and sharp leaf T / F3. The body of a tree is called the stemT / FExerciseMatch each word with its definition1.the prat that takes in light and air for the plant _________2.the part that takes in water for the plants _________3.the part of the plant with seeds_________ 4.the part that carries food and water to the plant _________ 5.the part that makes fruit and is very beautiful _________ 6.a living thing that grows in the ground._________rootstem flower plantleaf fruitReading Reading the passage. Complete the chartThere are many different kinds of plants.The parts help a plant to grow.The roots a plant take in water and hold the plant in theground.The stem carries food and water through the plant andholds up the plant.The leaves of a plant take in air and light for the plant.The flowers of plants make fruit.Flowers are very beautiful .People can eat the fruit.The fruit holds the seeds.Oranges ,apples, lemons ,and bananas are delicious fruit.Trees are very big plants.Trees have branches.Branches are the arm of a tree and have leaves.READING SKILL Main Idea and DetailsComprehension Choose the correct answer1.The roots of a plant are found in the ________.a.airb. soilc. leaves2.The stem of a plant carries ________.a.water and foodb. air and lightc. soil and ground3.The flowers of a plant make fruit ___________________.a.that hold up the plantb. that hold lemons or applesc. that people can eat4.The leaves take in air and light ,and ____________.a.the stem holds up the plant.b.the leaves turn into seeds.c.the flowers carry food and waterCritical ThinkingKey VocabularyLesson 02 Life Cycle of a Plantpart of a plant from which a new plant may be grown.seedlingA seedling is a young plant that comes out from a seed.sproutIf a plant sprouts, new leaves begin to grow on it.seed coatA seed coat covers and protects a seed.cone A cone, that has many seeds, is the fruit of the pine tree.Review Number the pictures in the correct order.Exercise Match each word with its definitionseed coat seedling sprout life cycle cone seed1.the series of changes of a living thing_________2.when new leaves begin to grow_________3.the part that covers and protects a seed_________4.a young plant growing out of a seed_________5.the small part from which a new plant may be grown_________6.the fruit of a pin tree, it has many seeds_________True of false Circle T for for false1. A seed grows out from a seedling T / F2. A cone is the brightly colored leaves of a flower T / F3. A seed coat protects a seed.T / FReading Reading the passage. Complete the chart A plant changes as it grows.All of these changes make a plant’s life cycle.A plant goes through many stages in its lifecycle.A plant begins life as a seed.Flowers make fruit that hold seeds.A seed has a baby plant inside.Seeds have special seed coats to protect them.A seed can also come from a cone.The seed sprouts and becomes a seedling.A seedling is a young plant.As it grows up, it becomes taller and thicker.A seedling grows into an adult plant.When the plant grows up, new seeds will begin the new life cycle. READING SKILL SequenceComprehension Choose the correct answer1.What do fruit and cones hold ________.a.seedsb. flowersc. seedling2.Seeds have ________ that protect them.a.baby plantsb. seed coatsc. young plants3.A seedling is a young plant that grows ___________________.a.out of a tree to become a seedb.but can not become an adult plantc.and becomes thicker and taller4.A plant goes through many changes as it grows ____________.a.and this is called its life cycleb.and it begins life as an adultc.changing from an adult into a seedlingCritical ThinkingKey VocabularyLesson 03 What plants need to growparts of a plant.spaceThe area available for use. If there is space, a plant can grow big and strong.soilSoil is where plants grow. Soil is the top part of the earth.warmth Warmth is the state or quality of being warm.thing from one the earth whereReview Number the pictures in the correct order.Exercise Match each word with its definitionsunlight soil warmth water air space1.the state or quality of being warm_________2.the gases that surround the earth_________3.the light from the Sun_________4.the top part of earth_________5.a liquid that is necessary for life_________6.the area available for use_________ True of false Circle T for true for false1.We can see air.T / F2.Soil is the top part of the earth.T / F3.Warmth is where plants grow.T / FReadingReading the passage. Complete the chartA plant needs many things to help it grow. It need sunlight, water, and air to help it grow. Sunlight comes from the Sun. It gives the plant warmth. A plant needs water to grow.Water helps carry food from the soil to all its parts. Soil has food for plants to grow big and strong.We can not see air ,but it is also important for the plant to grow. Plant grow in the ground.A plant needs space in the ground to grow bigger.Can you remember all the important things a plant needs togrow big and strong?READING SKILL Cause and EffectComprehension Choose the correct answer1. ________ has food for plants to grow.a.Sunlightb. Airc. Soil2.A plant needs _______ in the _______ to grow bigger.a.space groundb. air sunlightc. soil air3.We cannot see air,______________.a.water, or soil ,but they are important for a plantb.but this gas is important for a plant to growc.but it gives food and warmth to a plant4. If a plant dose not have enough food or water,________.a.the plant will get more sunlight to help it growb.the plant will move to another areac.the plant will not grow big and strongKey VocabularyLesson 04 Types of animalsthat lives in water and breathes through gills. Fish use fins and a tail to swim.Lesson 04 Types of animalsLesson 04 Type of AnimalsReviewTrue of false Circle T true for for false1. Amphibians have dry skin covered with scales.T / F2. Fish have scales and fur. T / F3. Insects have no bones.T / FExerciseMatch each word with its definition1.an animal that has smooth, wet Skin and can live in water and on land_________ 2.an animal that has three body parts and six legs_________ 3.an animal that lives in the water and has scales on its body_________4.an animal that has dry skin and lays eggs. _________5.an animal that has feathers and wings _________6.an animal with hair on its body_________Reptilemammal insect bird fish amphibianReading Reading the passage. Complete the chartThey are many kinds of animals.Some lay eggs and some give birth to live young.Some have smooth skin and some have scales.Some live in the water and some live on land.A mammal is an animal with hair on its body .Itgives birth to live young.A reptile has dry skin and lays eggs.Fish live in the water. They have scales on theirbodies and they lay eggs.Amphibians have smooth, wet skin, and most lay eggs.A bird is an animal with feathers on its body. It has wings.Many animals have bones in their bodies. Bones are hard and give an animal’s body shape.Insects have three body parts and six legs. They do not have bones. What kind of animals can you see every day?READING SKILL ClassifyComprehension Choose the correct answer1. Fish have scales, live in ________and lay eggs.a.waterb. wetc. land2.A mammal is an animal that give birth to ____________..a.live adultsb. live youngc. live eggs3.Amphibians have smooth, wet skin which_____________-a.enables them to live on land and in water.b.most use to lay eggs in waterc.means that they can not live in water4. A spider is not an insect because ,________.a.it does not have bonesb.it has 8 legs, not 6 legsc.it has 6 legs, not 8 legsKey VocabularyLesson 05 Body Parts of Animalsopenings on the side of a fish ’s head. Gills help a fish breathe underwater.that covers the Smooth means flat ,without any Feed means toReviewChoose the correct answerTrue of false Circle T for true for false1. A mammal has scales on its body. T / F2. A animals have smooth skin.T / F3. People have hair on their bodies T / FExerciseMatch each word with its definition1.one of the openings on the side of a fish ’s head_________2.the part of a bird that helps it fly_________ 3.a hard and pointed part of bird ’s mouth_________ 4.one of the many soft, thin parts that cover a bird ’s body _________ 5.an organ that helps some animals breathe_________ 6.the soft, thick hair that grows on the body of mammals_________fur lung gillwingfeatherbeakReadingReading the passage. Complete the chartAnimals have many different kinds of bodies and skins . A bird has many feathers on its body. It has twowings and a beak. The wings help the bird to fly.The beak is the hard part of bird ’s mouth. A bird us-es its beak to feed. Many animals breathe using their lungs.A fish breathes using gills on the side of its body. Some animals have very smooth skin.A frog have very smooth skin. All mammals have hair on their bodies. Some animals have fur on their bodies. People have a lot of hair on their head.beak gills wings breathe hairREADING SKILL Main Idea and DetailsComprehension Choose the correct answer1. Many animals ______using lungsa.gillsb. eatc. breathe2.A bird uses its beak ____________..a.to feedb. to flyc. to breathe3.People are mammals and have hair,_____________.a.which is mostly on their headb.and they breathe air using gillsc.which helps them to eat and fly4. Some animals have fur on their bodies, but ________.a.some animals have gills on their bodies like birdsb.all animals have hair on their headc.some animals have smooth skin like frogsKey VocabularyLesson 06Where animals livehabitata habitat is a place where an animals liveForestA forest is an area with many trees and plantsrainforestA rainforest is a forest in an area where it rains a lotdeserta desert is a place that gets little or no rain.oceanAn ocean is a very large area of salt wa-ter.arcticThe Arctic is an icy and cold place near the North PoleReviewTrue of false Circle T for true, F for false1. A desert is a very dry place.T / F 2. A wet land is a very large area of slat water.T / F3. Habitat is an area where it rains a lot T / FExerciseMatch each word with its definition1.an icy and cold place near the North Pole _________2.a place where an animal lives_________ 3.a place where that gets little or no rain _________ 4.a wood in an area where it rains a lot _________ 5.an area with many trees and plants_________desertoceanhabitat forest rainforest ArcticReading Reading the passage. Complete the chartA habitat is a place where animals live.There are many kinds of habitats.Forests are a good habitats for animals to live.In a forest, there are many trees, plants, and food.In a rainforest there are also many trees and it rainsa lot.The ocean is another habitat.The ocean is a large area of salt water.Many animals that can swim live in the ocean.In a wetland ,there is a lot of water and plants. Its wateris salty or not salty.A grassland is a flat and has a lot of grass.The Arctic and the desert are habitats that are notgood for animals to live. The arctic is very cold. A desert is very hot and dry.In the desert it does not rain much.READING SKILL ClassifyComprehension Choose the correct answer1.What is the name for a place where animals live?a.dryb.hibitatc. cover2.The ocean is a large area of ____________..a.ice and waterb. wet landc. salt water3.A desert does not get much rain,_____________.a.but it is a good habitat for animals to liveb.but it still has a lot of grass growing therec.but a rainforest does get a lot of rain4. A wetland has a lot of water and plants,________.a.and its water can be salty or not saltyb.and animals like camels and scorpions live therec.but is very dry because it never rains in a wetlandKey VocabularyLesson 07Land and Waterriver A river is a long, mov-ing piece of water.lakeA lake is a large area of water.A lake is smaller than an ocean.mountainA mountain is the highest kind of land. A mountain is very steep.plainA plain is a flat land. There are not many trees on a plain.hillA hill is a high area of land.A hill is smaller than a mountain.cliffA cliff is a high steep part of the land.ReviewTrue of false Circle T for true, F for false1. A lake is larger than an ocean. T / F2. There are many trees on a plain.T / F3. A cliff is a high, flat part of the land T / FExerciseMatch each word with its definition1.a high area of land which is smaller than a mountain _________2.a flat land not having many trees_________ 3.the highest kind of land which is very steep _________ 4.a long, moving piece of water_________5.a high, steep part of the land _________6.a large area of water which is smaller than an ocean_________rivermountain clifflake plainhillReadingReading the passage. Complete the chartThe earth has many different shapes. There are many different kinds of land. At the end of land, there are many cliffs. A cliff is a high, steep part of land. A mountain is the highest kind of land. It is very steep. A hill is a high area of land. It is smaller than a mountain.Valley and plains are low lands. A valley is a low land between moun-tains.A plain is a flat area of land. There are not many trees on a plain. A river is a large moving piece of wa-ter.A stream is a small river. Streams usually start at a mountain and finish at a beach.A lake is a large area of water.READING SKILL ClassifyComprehension Choose the correct answer1.A valley is a low land between ________.a.riverb. plainsc. mountains2.A stream is like a ____________..a.small riverb. small mountainc. high cliff3.At the end of land, there are cliffs which_____________.a.are the high, steep parts of landb.are the low, flat parts of landc.have many trees growing on them4. A river usually starts at a ________.a.plain and finishes at a mountainke and finishes at a hillc.mountain and finishes at a beachKey VocabularyLesson 08How does Earth ChangefloodA flood happens when it rains a lot, and the rivers and streams overflow.droughtA long period of time when there is little or no rain, The land gets very dry.crackan opening in the ground .A crack ismade when the land is dry.weatheringThe breakdown of rocks by the action of rain, snow, wind, etc.erosionwhen rocks and soil are moved by wind or water to a new placedig Dig means to move soil from one place to another.ReviewTrue of false Circle T for true, F for false1. A flood is an opening in the groundT / F 2. Weathering happens by the action of rain, snow, wind, etc.T / F3. Erosion happens when soil moves water T / FExerciseMatch each word with its definition1.a long period of time when there is little or no rain _________2.to move soil from one place an put it in another_________3.when the rock and soil are moved by wind or water to a new place _________4.the breakdown of rocks by the action of rain, snow, wind, etc. _________5.when it rains a lot and the rivers and streams overflow _________6.an opening in the ground which is made when the land is dry_________droughtflood digcrack erosionweatheringReadingReading the passage. Complete the chartThe weather can changes the Earth in many ways.If it rains too much ,it can flood.If there is too much water in the river and streams ,water can flow onto the land.A drought happens if there is no rain. The land gets very dry and sometimes it cracks.Weathering can also change the land. Weathering happens when rocks break and change.Erosion happens when wind or water moves rocks and dirt.To prevent erosion, you can dig the earth and plant a tree.The land can change quickly or slowly. The shape of the land is al-ways changing.Rain, wind and ice all make the land change.READING SKILL ClassifyComprehension Choose the correct answer1.What can happen if there is no rain for a long time ________.a.floodb. droughtc. overflow2.Weathering happens when rocks ____________..a.flow onto landb. are moved by waterc. break and change3.Rain,wind,and ice can all _____________.a.slowly make a flood happenb.change the shape of the landc.stop weathering from happening4. You can help stop erosion by ________.a.digging into the earth and planting treesb.digging the earth and weathering rocksc.moving rocks and dirt into cracks.Key VocabularyLesson 09 Natural Resourcesnatural resourcessomething from nature that people can use. Water,air,wood,and mineral resources.minerala substance that comes from rock and soil.Minerals are nonliving things.woodthe material from trees used to make paper, furniture, etc.golda precious, yellow mineral Gold is used for jewelry.silvera shiny gray mineral Silver is used for mak-ing knives and forks.copperan orange mineral Electricity travels through copper.Some factories ful material intoReviewTrue of false Circle T for true, F for false1. Minerals come from rock and soil.T / F 2. Minerals are living things.T / F 3. Natural resources are things from nature that people cannot use.T / FExerciseMatch each word with its definition1.an orange mineral which electricity travels through _________2.something from nature that people can use_________3.a shiny gray mineral which is used for making knives and forks _________4.the material from trees used to make paper, furniture, etc. _________5.a precious, yellow mineral which is used for jewelry_________6.a substance than comes from rock and soil and is a nonliving thing._________mineral copper woodsilvergold nature resourceKey VocabularyLesson 10Rocks and SoilsandThis is a material that comes from rock.There is a lot of sand on a beach.clayThis is sticky and soft material from the earth.topsoilThis is the soil nearest the surface of the ground.Topsoil is loose and soft.humusThis is a substance made from dead plants and animals. Humus is in soil.graniteThis is a very hard, dull colored rock.build Build means to make or construct some-thing.People build houses and apartments.face that is notReviewTrue of false Circle T for true, F for false1. Topsoil is found deep underground.T / F 2. Granite is pieces of dead plants and animals. T / F 3. There is a lot of sand on a beach.T / FExerciseMatch each word with its definition1.a substance made from dead plants and animals which is in soil _________2.a material that comes from rocks_________3.the soil nearest the surface of the ground which is loose and soft _________4.a very hard, colored rocks_________ 5.a sticky and soft material from the earth_________ 6.to make or to construct something such as houses and apartments_________build granite topsoilsandclay humusReadingReading the passage. Complete the chartGranite is a kind of hard rock.It is very strong and good to build things. We can making building with granite.Sand is a material that comes from rocks. Sand is very rough and there is a lot of it on a beach. Clay comes from soil. It is sticky and soft, but be-comes hard when it is dry.Humus is pieces of dead plants and animals. Humus comes from the topsoil.Sand, clay, and humus are kinds of soil.Soil is the top layer of the Earth.READING SKILL ClassifyComprehension Choose the correct answer1.Some material are rough and others are ________.a.topsoilb. smoothc. dead2.Where can you find a lot of sand? ____________..a.on a beachb. in humusc. in animals3.What is humus made of ? _____________.a.it ‘s made of dead plants and animals.b.it is made of clay and granite.c.it is made of sand, granite, and clay.4. Clay is sticky and soft ,but ________.a.become very strong when it is wet.b.become softer when it is dry.c.become hard when it is dry.。
《科学1b教师用书》lesson3flowers,fruitsandseed
了解水果的进化过程有助于理解其适应性和特点。
详细描述
水果的进化是为了更好地传播种子。随着时间的推移，水果的形态、颜色和味道都发生了变化，以更 好地吸引动物传播种子。同时，为了防止过度消耗，水果中的种子通常位于不易消化的部分。
03
Seeds
Definition and Function of Seeds
01
定义与功能
02
Flowers are the reproductive organs of plants, typically consisting of petals, stamens, and a pistil.
03
They serve to attract pollinators, such as insects or birds, which transfer pollen and aid in reproduction.
Evolution of Seeds
总结词
种子的进化历程与地球环境和生物演化密切相关。
详细描述
种子的出现是植物进化过程中的一个重要事件，大约在1亿年前开始出现。种子的进化 与地球的气候、环境变化以及生物演化等因素密切相关。随着时间的推移，种子逐渐适 应了不同的生存环境，发展出了多种形态和功能。种子的进化历程不仅有助于植物的繁
Flower-pollinator interaction
Pollinators visit flowers to collect nectar and pollen, transferring pollen from one flower to another during their visits. This interaction ensures pollination and reproduction of plants.
小学科学教科版四年级下册第一单元第4课《茎和叶》教案(2023新课标版)
4.茎和叶【教材简析】本课是《植物的生长变化》的第4课，本课主要介绍茎和叶是植物的营养器官，重点认识茎和叶在维持植物生长的过程中的作用，了解不同环境中茎和叶的形态会有差异。
经过一段时间的持续观察和记录，植物的种子在发芽之后，茎和叶都发生了明显的变化。
本课在前几课学习的基础上引导学生推测植物的茎和叶分别有什么作用，并设计相应的实验验证一一将植物的茎在有颜色的水中浸泡，观察其横切面和纵切面并进行比照，了解茎具有运输的作用；通过将局部叶用黑色纸遮光，一段时间后比照遮光的叶子和其他叶子，了解叶的光合作用；通过用干燥的塑料袋套在叶上，观察其变化，了解叶的蒸腾作用。
探究茎和叶作用的一系列活动，指向了“植物能制造和获取养分来维持自身的生存”这一学习内容。
【学情分析】在经过一年级《植物》、《动物》，三年级《动物的一生》的学习后，学生对于观察记录的方法已经能熟练的掌握和运用。
本课是本单元的第四课，经过前3课的学习，四年级的学生对植物的基本结构和在生长过程中的变化有一定的认识。
他们在种植植物的过程中，观察到植物在种子发芽后先生根再长茎和叶，但是对相应的功能还存在疑惑，这需要教师不断的引导鼓励学生在植物的不断变化中改进观察和记录的形式，并能在持续的观察中对植物的茎和叶的作用进行合理地猜测，设计具体的验证方法并付诸实践，在持续的探究活动中不断收获成果和乐趣。
【教学目标】［科学观念］通过观察和比照植物的茎和叶在实验前后的变化，知道茎有运输作用，叶有吸收阳光制造养分和蒸腾水分的作用。
［科学思维］在绘制叶在茎上的分布的样子时，描述出叶在茎上的生长方式，分析叶这样的生长方式对维持植物生存的作用；基于对植物生长情况的观察，提出对于茎与叶功能的合理推测。
［探究实践］利用提供的相关证据，探究茎和叶的作用，设计相关的实验方案并认识到茎和叶在维持植物自身生存中的作用。
［态度责任］在实践探究中，如实记录观察到的现象，基于事实调整自己的想法，形成实事求是的科学态度。
人教PEP三上_Unit 4 单元整体教学设计
单元整体教学设计模板学校名称：第一部分：单元规划Unit 4 Plants around us Period 1 Plants give us fruits.about?5.Watch and choose.The school gardens need help.__________.____________.Nice,And?_______________.A.We can water the grass.B.We can plant new trees.C.We can water the flowers.教授词汇:water,grass,trees,flowers.6.Listen and fill.Q:What do plants need？Plantsneed_____,_____,_____.学习核心词汇：air,water,sun7.Listen and chant. Air,water and sun.These can all help plants grow....8.Listen and imitate.3.能和同伴讨论如何建立绿水青山，培养学生的环境保护意识。
(迁移创新)12.Look and discuss.Green hills and cleanrivers start from you andme.How can we help?We can plant...We can water... 5.和同伴讨论如何建立绿水青山。
教师观察学生是否能和同伴讨论如何建立绿水青山，根据学生的表现，给与指导和鼓励。
设计意图：本阶段学习活动旨在帮助学生在迁移的语境中，创造性地运用所学语言，学生能和同伴讨论如何建立绿水青山，从课本走向现实生活，在谈论如何建立绿水青山的过程中，发展语用能力。
板书设计Unit 4 Plants around us Period 2 Plants need our help作业设计基础型作业：读Let’s talk的对话,录视频发在群里。
教科版4年级下科学第一单元第4课《茎和叶》优质课教案
第4课茎和叶(教材P10～12)授课时间：______________累计____1____课时3.提问：通过观察，大家发现凤仙花的茎有怎样的生长变化？（预设：茎长高了、长粗了。
）它的叶在茎上是如何分布的？（预设：是交错分布的。
）你们猜猜这样分布的好处是什么？（预设：这样分布叶子不会相互遮挡，都能晒到阳光。
）4.小结：随着凤仙花茎的长高，叶也越来越多。
凤仙花的叶在茎上的生长方式是互生，从上往下看，每一层叶子交叉排列，这样的生长方式有利于叶最大面积地接受阳光照射。
探索二：探究茎的作用1.过渡：通过观察，我们可以发现凤仙花的茎不断长高、长粗，那么它有什么作用呢？（教学提示：出示将带叶的凤仙花的茎放入盛有红色水的锥形瓶中几个小时后与放入之前的对比图片。
）2.提问：通过对比图片，大家发现凤仙花的茎和叶有什么变化？（预设：都变成了红色。
）为什么会变红呢？（预设：可能是茎将水分输送给了叶片。
)茎里可能是什么样子的?（预设:可能有许多像管子一样的结构。
)让我们将风仙花的茎分别纵切和横切开来看看。
3.活动：分发实验材料，引导学生分组进行实验。
4.讲解：通过实验，我们可以证实茎具有运输水分的作用。
除此之外，茎同时也运输养分给植物的各个部分，还能起到支撑植物的作用。
探索三：探究叶的作用1.过渡：前面我们通过观察，发现凤仙花的叶在茎上的生长方式是互生，我们推测这样生长的好处是可以让叶片最大面积地接受阳光的照射。
如果不让叶片接受阳光的照射会怎样呢？2.演示：出示课前一周用黑色纸遮住一片叶子的凤仙花植株，将黑色纸取下，引导学生仔细观察这片叶子。
3.提问：这片被遮住的叶子发生了什么变化？（预设：被遮住的叶子变黄了。
）为什么会变黄呢？（预设：没有阳光，叶子无法进行光合作用。
）叶还会有其他作用吗？4.演示：出示课前一天用干燥的塑料袋套住一片叶子的叶片较大的植物，引导学生观察塑料袋内的变化。
5.提问：塑料袋内发生了什么变化？（预设：里面有很多小水珠。
教科版科学四年级下册第一单元第4课《茎和叶》教学设计(公开课教案及导学案)
教科版科学四年级下册第一单元第4课《茎和叶》教学设计1.观察凤仙花的形态特征。
实验活动观察方法记录表1.测一测：植株的高度；2.数一数：叶片的数量；3.看一看：叶在茎上的分布情况；4.画一画：叶在茎上分布的样子。
学生活动31.推测并验证凤仙花茎的作用。
实验活动观察方法记录表1.将一段凤仙花的茎放入装有红色墨水的杯中静置一天。
2.多种方法对比观察凤仙花茎和叶的变化。
1.选择两片凤仙花的叶子，叶片1用黑色纸将其遮住，不见阳光。
叶片2套上干燥的透明口袋；2.3天后，对叶片进行观察记录。
3.小结：通过活动，知道植物的茎和叶对植物生存的作用。
1.学生观察凤仙花。
可以从哪些方面观察凤仙花？引导学生从植株高度、叶片数量、叶的分布多角度出发。
2.指导学生具体的观察方法与记录方法，并带领学生填写记录表。
3.指导学生交流、汇报观察方法，观察结果。
教师活动3引导学生根据茎和叶的外部特征推测茎和叶的作用；思考可以通过什么方法或实验进行验证。
学生小组讨论后，全班交流。
实验活动一：1.学生先小组讨论进行实验设计，后播放实验操作视频1提醒注意事项，学生进行分组操作和数据收集。
2.引导学生多种方法进行切面对比观察，发现凤仙花茎的变化，组织学生交流、汇报观察方法、观察到的变化，汇报总结后播放微视频：茎的运输作用。
实验活动二：1.学生先自行思考后小组交流实验设计，后后播放实验操作视频2提醒注意事项，学生仔细观察后进行分组操作和数据收集。
2.引导学生对比观察凤仙花叶的变化，组织学生交流、汇报观察方法、观察到的变化。
3.讨论思考水分是怎么从叶子里跑出来的？4.汇报总结后，播放微视频：叶的蒸腾作用和光合作用。
教科版科学四年级下册第一单元第4课导学案学习内容茎和叶学习目标（1）观察破土后的凤仙花生长过程，记录它的形态特征变化及生长规律。
（2）推测并验证茎和叶在植物的生长过程中的作用和功能，激发学生科学探究的能力。
（3）学生在凤仙花的种植观察中体会到科学研究艰辛但有趣。
新教科版2021-2022四年级科学下册第4课《茎和叶》教案
新教科版2021-2022四年级科学下册第4课《茎和叶》教案一. 教材分析《茎和叶》是新教科版2021-2022四年级科学下册第4课的内容。
本节课主要让学生通过观察、探究茎和叶的结构及其功能，了解植物的生长过程，培养学生对科学的兴趣和探究能力。
教材内容丰富，包括茎和叶的形态、结构、功能等方面的知识，以及相关的探究活动。
二. 学情分析四年级的学生已经具备了一定的观察能力和探究能力，他们对植物有了一定的了解。
但在观察茎和叶的结构方面，学生可能还缺乏细致的观察和认知。
因此，在教学过程中，教师需要引导学生进行细致的观察，并通过探究活动让学生深入了解茎和叶的结构和功能。
三. 教学目标1.知识与技能：了解茎和叶的形态、结构、功能，能说出茎和叶的主要特征。
2.过程与方法：通过观察、探究、实验等方法，培养学生的观察能力和探究能力。
3.情感态度价值观：培养学生对自然的热爱，增强环保意识。
四. 教学重难点1.教学重点：茎和叶的形态、结构、功能。
2.教学难点：茎和叶的微观结构。
五. 教学方法1.引导观察：教师引导学生观察茎和叶的形态、结构，培养学生的观察能力。
2.探究活动：教师学生进行小组探究，让学生通过实验、讨论等方式深入了解茎和叶的结构和功能。
3.案例分析：教师呈现植物生长的实例，引导学生分析茎和叶在生长过程中的作用。
4.互动交流：教师鼓励学生提问、回答，促进学生之间的交流与合作。
六. 教学准备1.教具：茎和叶的实物、显微镜、实验器材等。
2.课件：茎和叶的图片、视频等。
七. 教学过程导入（5分钟）教师出示一颗植物，引导学生观察其茎和叶的形态，激发学生的兴趣。
呈现（10分钟）1.教师通过课件呈现茎和叶的图片，让学生说出茎和叶的主要特征。
2.教师呈现茎和叶的微观结构图片，引导学生了解茎和叶的微观结构。
操练（10分钟）1.教师学生进行小组探究，让学生通过实验观察茎和叶的微观结构。
2.教师引导学生进行实验操作，如切茎、观察叶片等，让学生亲身感受茎和叶的结构。
教科版小学科学四年级上册教师用书
使用说明 (2)教科书整体结构表 (4)本册教科书的教学目标与内容概要 (4)主要材料清单 (6)各单元说明与教学建议 (7)溶解 (7)一、单元概述 (7)二、单元教学目标 (8)三、分课时教学建议 (9)第1课水能溶解一些物质 (9)第2课水是怎样溶解物质的 (10)第3课液体之间的溶解现象 (11)第4课不同物质在水中的溶解能力 (12)第5课溶解的快与慢 (13)第6课一杯水能溶解多少食盐 (14)第7课分离食盐与水的方法 (15)四、评价建议 (17)五、教学案例 (18)一杯水能溶解多少食盐 (18)六、参考资料 (20)声音 (22)一、单元概述 (22)二、单元教学目标 (23)三、分课时教学建议 (24)第1课听听声音 (24)第2课声音是怎样产生的 (25)第3课声音的变化 (26)第4课探索尺子的音高变化 (28)第5课声音是怎样传播的 (29)第6课我们是怎样听到声音的 (31)第7课保护我们的听力 (32)四、评价建议 (34)五、参考资料 (36)天气 (41)一、单元概述 (41)二、单元教学目标 (42)三、分课时教学建议 (43)第１课我们关心天气 (43)第2课天气日历 (45)第3课温度与气温 (46)第4课风向和风速 (48)第5课降水量的测量 (50)第6课云的观测 (51)第7课总结我们的天气观察 (52)四、评价建议 (54)五、参考资料 (56)我们的身体 (61)一、单元概述 (61)二、单元教学目标 (62)三、分课时教学建议 (63)第1课身体的结构 (63)第2课骨骼、关节和肌肉 (64)第3课跳动起来会怎样（一） (66)第4课跳动起来会怎样（二） (68)第5课食物在体内的旅行 (69)第6课口腔里的变化 (71)第7课呵护我们的身体 (73)四、教学案例 (75)身体的结构 (75)骨骼、关节和肌肉 (76)五、参考资料 (77)使用说明与教科版科学教科书配套的《科学教师教学用书》是为切合教师教学的实际需要而编写的，三至六年级共8册。
AmericanTextbookReadingseries1-4
AmericanTextbookReadingseries1-4 American Textbook Reading Social Studies 2Part 1. Home, School, and NeighborhoodLesson 1. The First AmericansLesson 2. Celebration of HolidaysLesson 3. People Find New HomesPart 2. We Are Good CitizensLesson 4. The United States GovernmentLesson 5. The Pledge of AllegianceLesson 6. The Symbols of the United StatesPart 3. Everything ChangesLesson 7. Changes in TransportationLesson 8. People Start Coming to AmericaLesson 9. The Beginning of the United StatesPart 4. People WorkLesson 10. JobsLesson 11. From Factory to YouLesson 12. Visiting the MarketPart 5. Where We LiveLesson 13. City, Town, and SuburbLesson 14. Our ResourcesLesson 15. This is Our World American Textbook Reading Science 2Part 1. Life ScienceLesson 1. What Animals Need to Grow Lesson 2. Living Things vs Nonliving Things Lesson 3. Adaptations for Survival Lesson 4. The Human Life CyclePart 2. Earth ScienceLesson 5. WeatherLesson 6. Measuring the WeatherLesson 7. Clouds and RainLesson 8. SeasonsLesson 9. The SkyPart 3. Physical ScienceLesson 10. HeatLesson 11. LightLesson 12. SoundLesson 13. ElectricityLesson 14. MotionLesson 15. MagnetsAmerican Textbook Reading Social Studies 1Part 1. Home, School, and Neighborhood Lesson 1. Family and Home Lesson 2. Time for SchoolLesson 3. CommunityPart 2. We Are Good CitizensLesson 4. People Need LawLesson 5. What Can Citizens Do?Lesson 6. Choosing Community LeadersPart 3. Everything ChangesLesson 7. Things Change with TimeLesson 8. Changes in Family LifeLesson 9. Changes in CommunicationPart 4. People WorkLesson 10. Needs and WantsLesson 11. Goods and ServicesLesson 12. Spending and SavingPart 5. Where We LiveLesson 13. Here on EarthLesson 14. Weather and SeasonsLesson 15. Land and WaterAmerican Textbook Reading Science 1Part 1. Life ScienceLesson 1. Parts of PlantsLesson 2. Life Cycle of a PlantLesson 3. What Plants Need to Grow Lesson 4. Types of Animals Lesson 5. Body Parts of AnimalsLesson 6. Where Animals LivePart 2. Earth ScienceLesson 7. Land and WaterLesson 8. How Does Earth Change?Lesson 9. Natural ResourcesLesson 10. Rocks and SoilLesson 11. Saving Natural ResourcesPart 3. Physical ScienceLesson 12. Matter and SensesLesson 13. Observing MatterLesson 14. Solid, Liquid, GasLesson 15. Matter and Its ChangesAmerican Textbook Reading Science. 3American Textbook Reading Science. 4American Textbook Reading Social Studies. 3American Textbook Reading Social Studies. 4。
(北京市)教科版小学四年级下册科学教师用书
教科版：四年级下册教师用书(修订版)各单元说明与教学建议电一、单元概述当我们轻轻闭合开关：电灯就会发出光，收音机就会播放动听的乐曲，电视机就会呈现五彩缤纷的画面……这一切对我们来说似乎早就习以为常了。
电的大规模应用，是基于人类对电的不断探究。
孩子们也对电感兴趣。
这一单元将借助导线、灯泡、电池等电器元件和许多有趣的探究活动，帮助学生建立有关电的初步概念，促进他们对科学探究的理解和探究能力的发展。
本单元的第1课“生活中的静电现象”，学生将首先对身边的静电现象开展一系列的探究活动。
静电现象在学生们的身边经常会发生。
在这一课中，他们将知道静电现象是物质在外力作用下，发生电荷转移而形成的。
同种电荷相互排斥，异种电荷相互吸引。
如果电荷能持续地向一个方向流动，就会产生电流。
这些是学生们建立电概念的基础。
接下来在“点亮小灯泡”“简单电路”“电路出故障了”三课中，学生将开展对电路的研究。
用一根电线和一个电池使小灯泡发光。
这一活动看似简单，但四年级的学生仍会津津有味地参与到活动中。
他们将在活动中认识电、电路，想象电流是怎样流动的。
而在一次次使小灯泡亮起来的实验中，他们会提出更具挑战性的任务，并尝试着用更多的连接方法使小灯泡亮起来。
电池盒和小灯座的使用将使他们连接的电路更加稳定，并便于操作。
为了“让更多的灯泡亮起来”，学生将探索不同电路连接方式对小灯泡的影响。
在电路中，如果某个地方连接不好或者某个电器元件出了问题，都有可能导致灯泡不亮。
“电路出故障了”一课的学习内容，引导学生在寻找电路故障的过程中，将自制的“电路检测器”作为重要的检测工具。
同时，在此过程中，学生们将形成关于电的一些重要概念，如“电是一种能源，它能使物体发光、发热”“要使小灯泡发光，电必须流经包括电池在内的完整的回路”“用相同的材料可以连接不同的电路”等。
用“电路检测器”检测“导体与绝缘体”，将使学生对身边物质性质的认识得到发展，同时对电的理解也得到加深。
第四册科学课教案.docx
第四册科学课教案本册教材有《生活屮的空气》、《共有的家园》、《植物的花和果实》、《关爱健康》、《设计与制作》、《活动》等6个教学单元，共20篇课文。
全学期授课为36 课时。
（1）单元课时安排（2）各课课时安排*:观察实验操作项目起始课一、简单总结上学期科学课学习情况。
二、提出本学期科学课上课要求：1.摆放文具的位置，注意：铅笔盒不能发出声音。
2.有问题举手，举手时不许叫，没叫到时放下手。
如果有特殊问题或上厕所时, 举拳头姿势（左手）。
3.拿书姿势提醒一下。
4.上课时手放在行后。
5.排队去科学教室时耍安静，右手将书夹紧，可以不带文具盒，以免有响声。
6.进科学教室后椅子怎么拿？一定注意轻拿轻放，爱护桌椅。
7.出教室吋，按一定的顺序出门，不要挤8.分组讨论时的要求。
9.奖励措施。
（考试要求等）〈生活中的空气〉单元框架一、单元教学内容第一课空气的成分第二课氧气第三课二氧化碳第四课燃烧和灭火二、单元教学基本标准（一）态度、情感、精神、价值观1•激发和发展学生进一步探究空气的兴趣。
2.具有严谨踏实、求真求实，尊重客观规律的科学态度和科学精神。
3.具有爱护空气环境、珍惜良好空气环境的情感和不污染空气环境的责任感。
4.通过了解空气中的主要成分及它们与人类的联系，向学生进行自然界的事物是相互联系的科学自然观教冇。
5.向学生进行防火安全教育、具有安全用火的意识。
（-）能力1•培养学生科学的观察能力，比较、分析的思维能力。
培养学生进行对比实验、模拟实验和探索实验的能力。
能应用己有知识和经验对所观察的现象作假设性解释的能力。
2•培养学生的分析综合能力；学习一些基本的实验方法和测量的方法；学习简单的灭火技能。
（三）知识与技能1.通过教学使学牛认识空气的成分，空气是由多种气体混合而成的。
2.通过教与学使学生知道氧气具有支持燃烧和二氧化碳不支持燃烧的性质；同时指导学生认识氧气和二氧化碳的用途以及灭火的知识。
三、教学仪器、材料一览表四、单元教学课时：4五、单元教学重难点:通过教学使学生认识空气的成分，空气是由多种气体混合而成的。