🧩 板块构造：大陆会漂移🧩 Plate Tectonics: Continents That Drift

上一片里，软流层像一锅浓粥，热烘烘地翻滚。站在它上面的地壳碎成了几大块，被带着一起旅行——这一片看大地是怎么“漂”的。🌍 蓝色星球向导带你拼大陆、判边界。 Last leaf, the soft asthenosphere churned like thick hot porridge. The crust above it broke into giant slabs that ride along — this leaf watches the ground drift. 🌍 your blue-planet guide helps you rebuild continents and judge boundaries.

第 1 步：大陆曾经连成一块Step 1: The continents were once joined

地壳会漂——证据就藏在地图里。The crust drifts — and the proof hides in the map.

盘古大陆分离漂移 — 100 多年前，魏格纳盯着地图发现：南美洲东海岸，和非洲西海岸像拼图一样合得上。他提出大陆漂移说：大陆曾经连成一块，叫盘古大陆。后来人们找到铁证：大西洋中间不断长出新地壳，海底越撑越宽。 A century ago, Wegener stared at the map: South America's east coast fits Africa's west like puzzle pieces. He proposed drift: all land was once one supercontinent, Pangaea. Later came hard proof — new crust keeps growing mid-Atlantic, stretching the seafloor wider.

漂着漂着，板块总会遇见邻居——见面有三种方式。Drifting along, plates always meet neighbours — in three ways.

第 2 步：板块见面有三种方式Step 2: Three ways plates meet

分离碰撞错动三种边界对比 — 分离：两边分开，岩浆从中间冒出来，长出新地壳，大西洋越变越宽。碰撞：互相挤压，一边俯冲到另一边下面，地面隆起成山。错动：擦肩而过，谁也不低头，加州圣安德烈斯断裂就是这样。 Divergent: sides split, magma wells up between them, new crust grows — the Atlantic widens. Convergent: plates squeeze, one dives beneath the other, land crumples into mountains. Transform: they slide past, neither giving way — like California's San Andreas Fault.

碰撞的力气有多大？看看最高的山。How strong is a collision? Look at the tallest mountains.

第 3 步：喜马拉雅还在长高Step 3: The Himalayas still grow

印度板块碰撞造就喜马拉雅 — 印度板块撞上亚洲，岩层被挤得隆起，就成了喜马拉雅。它每年还长高几毫米。板块每年只走几厘米，和你的指甲长得一样慢。慢，但从不停——大陆漂移说就这样长成了板块构造理论。 India crashed into Asia, rock layers crumpled upward — and became the Himalayas, still rising millimetres a year. Plates move only centimetres a year, as slow as your nails grow. Slow, but never stopping — that is how drift grew into plate-tectonic theory.

🎮 你来拼大陆（30 秒）🎮 Your turn: rebuild the land (30 seconds)

道理讲完了。先拼回盘古大陆、看它漂移；再判 4 个真实地点的边界类型。Theory done. Rebuild Pangaea and watch it drift; then judge the boundary type of 4 real places.

一句话记住它：地壳碎成板块，在软流层上漂；分离是分开、碰撞是挤压、错动是擦肩而过。 Remember it in one line: the crust is broken into plates drifting on the asthenosphere; divergent splits, convergent squeezes, transform slides past.

盘古大陆：大陆曾经连成一块，大西洋中间还在长出新地壳Pangaea: all land was once joined; new crust still grows mid-Atlantic 三种边界：分离分开、碰撞挤压隆起、错动擦肩而过Three boundaries: divergent splits, convergent crumples up, transform slides past 每年几厘米，和指甲一样慢，但从不停Centimetres a year — nail-slow, but never stopping

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内容参考 OpenStax 等公开教材，多来源核对 · AI 生成、人工审核 · 发现错误欢迎指正，帮这片叶子长得更好。 Based on OpenStax and other open textbooks, cross-checked across sources · AI-generated, human-reviewed · Spotted a mistake? Tell us — help this leaf grow.