【探究：蜗牛🐌】20200430万思乐学V-learn小西妈双语工程1809期学号045Ryan打卡

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蜗牛

蛞蝓

蜒蚰

鼻涕虫

儿歌

摩擦力

动物

幼儿

陆生

粘液

蜗牛是指腹足纲的陆生所有种类。一般西方语言中不区分水生的螺类和陆生的蜗牛，汉语中蜗牛只指陆生种类,而广义的蜗牛还包括巨盾蛞蝓。蜗牛是一种包括许多不同科、属的动物。取食植物，产卵于土中或者树上。在热带岛屿比较常见，但有的也生存在寒冷地区。树栖种类的色泽鲜艳，而地栖的通常几种接近的颜色，一般有条纹。非洲的水晶螺属体型最大，多超过20公分。欧洲的大蜗牛属的几个种常作佳肴，尤其在法国。蜗牛是陆地上最常见的软体动物，其具有很高的食用和药用价值。

中文学名

蜗牛

拉丁学名

Fruticicolidae

别称

蜗娄牛、驼包蜒蚰

二名法

Oophana heudei

界

动物界

涉及双清单元，汉语文化启蒙第四册第二单元蜗牛与黄鹂鸟

清华幼儿英语语感启蒙0bu9

文化背景

乌龟缩头快，蜗牛缩头慢，因此第一段儿歌速度稍快，第二段稍慢，幼儿在唱儿歌时会感受到两种动物不同的情绪，还会学着它们背着壳的样子，最有趣的就是要把脑袋一伸一缩地躲进壳里，实在是太好玩了！这首儿歌还可以设计成好玩的手指游戏和亲子活动。其中，be-bop, be-bop用来形容乌龟和蜗牛头一伸一缩的模样。

1、家里水池边有像蜗牛一样的虫叫蛞蝓，也叫鼻涕虫。

2、简介

蛞蝓 [kuò yú]（学名 Agriolimax agrestis Linnaeus）为腹足纲，柄眼目，蛞蝓科动物的统称。又称水蜒蚰、鼻涕虫，中国南方某些地区称蜒蚰（不是蚰蜒），俗称鼻涕虫，是一种软体动物，与部分蜗牛组成有肺目。雌雄同体，外表看起来像没壳的蜗牛，体表湿润有黏液，民间留传在其身上撒盐使其脱水而死的捕杀方法。

3、危害特点

蛞蝓取食草萄叶片成孔洞，或副食其果实，影响商品价值。蛞蝓是一种食性复杂和食量较大的有害动物，遇见可将食盐或白砂糖洒在蛞蝓身上，数分钟之后会化成粘液状液体。

【Snails 】

Snails have a shell. It has spirals （螺旋）on its shell.

You can find it leaves a trail of slime （粘液）while it crawls .

It is very sticky. Overall, this creature is small, tough and slimy.

Land snails

Land snails are nocturnal [nɑːkˈtɜːrnl] （夜间活动） animals and move to find food at night. 

They like a damp（潮湿的）but not a wet environment .

Their enemies are birds and mammals like mouse.

Water snails

There are also many water snails. Some of them live in rivers or freshwater, but most are living on oceans ground.

Ocean snails are colorful, so they can be pink, blue, red, grey, yellow and also with many other colors. The colors protect them.

Water snails are not as active as land snails in general.

Water snails' most enemies are fishes .

Habitat

Snails are found all over the world.

Generally speaking, land snails live on damp habitats.

They live in caves and dark places，such as in a garden under plant's leaves. 

Some snails are living in water. They live in the sea, fish tanks, rivers and oceans.

They do not swim in the water because most of the time they stick to rocks.

Food

Land snails eat vegetables and fruits, such as lettuce, carrots, cucumber and apples.

Water snails are often carnivorous.

Snails use their radula to cut food. The radula is a hard, rough plate in the mouth. Radula teeth are like little pieces of sandpaper 砂纸.

They are good for cutting up plants and if the snail eats meat they are good for tearing the meat apart.

Many animals eat snails. Fireflies, snakes, beetles, fish, insects, turtles and people eat snails too.

To defend themselves, snails pull back into their shells.

Body parts

（1）Shell

Snails are invertebrates[ɪnˈvɜrtəbrəts] 无脊椎动物, which are animals with no backbones 脊椎. 

The shell on the snail helps protect it, and also reduces the loss of water by evaporation [ɪˌvæpəˈreɪʃn] 蒸发.

Shells have many different shapes, sizes, and colours.

Snails do not breathe through their mouths, instead they have a breathing hole under their shells.

(2) Foot

A snails "foot" is a muscle which allows it to move slowly across the ground.

The foot puts out slime [slaɪm] 粘液, which eases [ˈiːzɪz]延缓 the snail's movement, leaving a trail 轨迹 . 

（3）Head

The head is attached to the foot. The mouth is like a cheese grater [ˈɡreɪtər] 研磨机. It is called a "radula". 

It is used for cutting food. On the radula there are little teeth.

（4）Tentacles [ˈtɛntəkəlz] 触须

The two pairs of tentacles are at the snail’s head ， the larger of which has eyes at the tips.

On the head there are 15 mm stalks [stɔːks]肉筋 . At the end of the stalks are snail’s eyes, though they do not see very well.

蜗牛🐌

蜗牛是陆地上最常见的软体动物

蜗牛的种类有很多，约25,000多种遍布世界各地，仅我国便有数千只

蜗牛是世界上牙齿最多的动物

虽然它的嘴大小跟针尖差不多，但却有26,000多颗牙齿。

🌴关于蜗牛的探究

1.蜗牛吃什么？

2.蜗牛怎么走路？

3.蜗牛在纸板上和玻璃上爬行速度哪个更快？

关于摩擦力 

纸板上有摩擦力

玻璃上 没有摩擦力

🌴一辈子有很多事情需要坚持做 

要想成功必须踏踏实实 锲而不舍

蜗牛吃油菜花

小蝌蚪没换水挂了……又是一件伤心的往事……两条命

拿旧本子改造成了，观察笔记📒

蜗牛给我们画了画，好开心，词穷

取了名字叫：蜗牛哥哥和蜗牛妹妹

没有稿子读，回头看看好多说的什么🤔

天呐！时态都错❌

Day202

🎯年龄阶段4周岁9个月

本周内容20200426-0502

新学：汉4-4 3a3

清华幼儿英语语感启蒙

🌴Listening

牛听听课程

🌴Video

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