二年级语文上册识字2《树之歌》教学课件新人教版.ppt

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1、识字2 树之歌,第一课时,冬天光着头, 春夏长绿发。 就有一只腿, 小鸟喜欢它。,猜猜它是谁,本课讲了 种树,分别是:,杨树、榕树、梧桐树、枫树、松树、柏树、木棉、桦树、银杏、水杉、金桂。,11,杨树,高,榕树,壮,梧桐树叶,像手掌,枫树,红 色,松柏树,不畏严寒 四季常青,木 棉,喜 好 在 南 方,桦 树,hu,耐寒长 在北疆,银杏、水杉,活化石,桂 树,开 花 满 院 香,写字有方,杨,桐,松,棉,化,壮,枫,柏,杉,桂,壮,杉,化,泡桐 云杉 翠柏 白桦松子 枫叶 白果 桂花,po tng yn shn cu bi bi husng z fng y bi gu gu hu,第二课时,树

2、之歌 杨树高,榕树壮, 梧桐树叶像手掌。 枫树秋天叶儿红, 松柏四季披绿装。 木棉喜暖在南方, 桦树耐寒守北疆。 银杏水杉活化石, 金桂开花满院香。,资料袋,榕树原产于热带亚洲,以树形奇特,枝叶繁茂,树冠巨大而著称。枝条上生长的气生根,向下伸入土壤形成新的树干称之为“支柱根”。榕树高达30米,可向四面无限伸展。其支柱根和枝干交织在一起,形似稠密的丛林,因此被称之为“独木成林”。,松 柏,枫 树,木 棉,桦 树,银杏:最早出现于3.45亿年前,被科学家称为“活化石”,“植物界的熊猫”。现存种子植物中最古老的孑遗植物。从栽种到结果要二十多年,四十年后才能大量结果,能活到一千多岁,是树中的老寿星。,再见,

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