Proof for Evolution!

Proof for Evolution!

Fossils

Poll

How are we today?

• Happy

• Tired

• Hungry/Bored

• Meh

• Sad

Fossils?

Recall that FOSSILS are the remains of animals and plants.

But how did they survive?

How are fossils formed?

• When any form of tissue, under certain circumstances, avoid breaking down.

• Can be filled in and hardened by sediment over time.

Examples

• Mold & Casts

• Trace Fossils

• Fossilized in Original Material

Molds and Casts

• When sediment fills in or around a fossil.

• Molds cover hard tissue, leaving an imprint.

• Casts are molds that were filled in with extra sediment.

Multiple Choice

Cast or Mold: A horseshoe crab imprinted on sediment.

• Cast

• Mold

Age Check ✔ Fossil Records

• Geologic Time Scale: A chart that divides Earth's History into Time units.

• Relative-Age Dating: Age based on where the fossils are found.

• Absolute-Age Dating: Using radioactive decay in rocks to determine a fossil's age in years.

• Extinction: When an entire species dies out.

Fossil Changes!

• As many fossils are discovered nearby, certain patterns emerge.

• Many fossils are found to have similar structures, as if they are related!

• Example: Horses!

Multiple Choice

True or False: If similar fossils are found, this tells us an animal has changed over time.

• True

• False

Poll

How was today's class? (Be honest.)

• Great! Amazing! 10/10

• Boring, but I learned something

• I'm not sure. 50%

• I'm lost. 0%

• Worst Class Ever!!

  -_-