化石的形成
How fossils form
用简单的话说明化石是怎样形成的：生物死亡后被埋在泥沙里，经过数百万年，被封存在岩石中。
Describe in simple terms how fossils are formed when things that have lived are trapped within rock over millions of years
学习证据 / Evidence
- 描述基本过程：生物死亡，被埋在泥土或沙子里，层层堆积，经过数百万年变成岩石。
- 解释生物的形态以化石的形式保存在岩石中。
- 举出常见化石的例子（贝壳、骨头、叶片印痕、脚印）。
- Describe the basic process: organism dies, gets buried in mud/sand, layers build up, material turns to rock over millions of years
- Explain that the organism's shape is preserved as a fossil within the rock
- Give examples of common fossils (shells, bones, leaf imprints, footprints)
评估问题 / Assessment
{{name}}能解释一下，古代生物的贝壳或骨头是怎么被保存到岩石里的吗？
Can {{name}} explain how a shell or bone from an ancient creature ended up preserved inside a rock?