評論
打印
Fossil
化石
Fossils are the ramains of animals or plants.
化石是動物或植物的遺骸。
They are usually inside of rocks.
它們通常在巖體內。
They are typically more than ten thousand years old.
它們通常有一萬多年的歷史。
Fossils are made by sudden changes on the Earth, like volcanoes and tsunamis.
化石由發生在地球上的突變形成的，比如火山和海嘯。
Animals and plants are buried in soil by the sudden changes.
動物和植物因這樣的突變而被埋在了土壤中。
Then, they become rocks.
然后，它們就變成了巖石。
The oldest fossil is about 4 billion years old.
最古老的化石約有40億年的歷史。
