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.

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Presentation transcript:

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 in 4, 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

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 periods Where the dinosaurs died.  Now?? Humans? Global Warming Sea level rise Changing CO 2 level Loss of resources

Evolution  What is this? The response to environmental changes an organism that allows it to survive.  Example: ?Allergies Birds beaks Diseases Goose bumps Wisdom teeth Coccyx (tail bone) Appendix

Causes  Environmental factors: Plate tectonics Atmospheric changes Physical needs Weak 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.