How do scientists know how old a fossil is? Day 1 and Day 2

Day 1

Are the oldest fossils in the top layer, middle layers, or bottom layer?

• top layer

• middle layer

• bottom layer

Day 1

If scientist found a fossil in the middle layer that was 2 million years old, would they think Earth was more or less than 2 million years old?

• less than 2 millions years old

• more than 2 millions years old

Day 1

What are scientists interested in fossil record?

• By studying fossils in different rocks layers of rocks, scientists can understand what Earth was like long ago.

• By studying fossils in different rocks layers of rocks, scientists can understand fossils.

• By studying fossils in different rocks layers of rocks, scientists can understand what fossils are.

Day 2

Reptile fossils are older than bird fossils.

• True

• False

Day 2

Humans and dinosaurs lived during the same time.

• True

• False

Day 2

The newest fossils are from ocean creatures.

• True

• False

Day 2

Fish appeared on Earth after mammals did.

• True

• False