What Fossils Are Made Of: teacher key

Fossils, grade 2 edition, written for 2nd grade. Fossils are what is left of plants and animals from long ago. Find out what can become a fossil and how it happens.

Read the book. Print this page for the key.

Questions and answers

1. What turns buried bones and teeth to stone?
   • Water full of minerals (answer)
   • Hot sand
   • Cold wind
2. What does a dead animal need to become a fossil?
   • To be eaten
   • To be covered up fast (answer)
   • To be left in the sun
3. Which of these can amber hold?
   • Tiny ants and flies (answer)
   • Big whales
   • Old bones of dinosaurs
4. A fossil is a leg bone. Which kind of fossil is it?
   • A trace fossil
   • A body fossil (answer)
   • A feather print
5. What does silt mean?
   • Fine mud (answer)
   • Hard rock
   • Old sap

Words

• silt: fine mud
• minerals: rock bits
• amber: old tree sap