Today

Hand in any work needed. Get out a small piece of paper, PUT

YOUR NAME ON IT. When bell rings the quiz will start and

you will have 1 minute per question to answer.

Question 1 List the order the rocks came in

First

Second

Third

Forth

Fifth

Sixth

Question 2

What is the oldest group here?

Question 3

What geologic period did the placoderm fish mostly live?

Question 4

What minerals are in andesite?

Answers

1.) List the order the rocks came in4, 5, 2, 6, 1, 3

2.) What is the oldest group here?Borden group

3.) What geologic period did the placoderm fish mostly live?Devonian

4.) What minerals are in andesite?Feldspar, Biotite, Amphibole

MASS EXTINCTIONS

Vocab

Time scale Mass extinction Evolution

Geologic Time Scale

Earth was formed 4.6 BYA (billion Years Ago)

How do we know this? How old is the oldest rock

on Earth?(look at your ESRT!)

Geologic timeline Copy this down!

Mass Extinctions

These are events where most or a lot of living things on Earth were killed.

To go Extinct means to have a whole species die and nothing is left living from that species.

Causes of mass extinctions Meteor impacts Global Warming Oxygen levels Sea level change Storms Volcanic eruptions Possible many more things… can

you think of something?

5 Major mass extinctions Cretaceous (65mya)

62% loss of species caused by impact and flood basalts Triassic (210mya)

65% loss of species caused by impact and flood basalt. Permian (250mya)

90% loss of species caused by impact, flood basalts, & global warming.

Devonian (365mya)72% loss of species caused by impact.

Ordovician (445mya)65% loss of species caused by ice age and sea level

fall (still debated)

Historic Mass Extinctions One famous one is the K-T extinction.

Cretaceous and Tertiary periodsWhere the dinosaurs died.

Now?? Humans?Global WarmingSea level riseChanging CO2 levelLoss of resources

Evolution What is this?

The response to environmental changes an organism that allows it to survive.

Example:?AllergiesBirds beaksDiseasesGoose bumpsWisdom teethCoccyx (tail bone)Appendix

Causes Environmental factors:

Plate tectonicsAtmospheric changesPhysical needsWeak links die off..

All occur over long time frames!

Evidence

Birds beaks Whales have a hip bone!? Ancient giraffes had shorts necks Arms of different animals have

same parts.