Bell-ringer: 5 minutes 1. Understanding the fossil record can be used by scientists in the field of:   a. Earth Science   b. Geology   c. Evolutionary biology   d. Taxonomy  e. All of the above 2. Annotate and analyze the following image Copy CCSS/MS, Objectives, HW If missing a grade… copy directions in folder

Mantra Today is a great day for science because: science is power. You are powerful because: I always make a difference.

Agenda Class Website!! / Parent-signed notes? Paper Return/ Grade Sheets/ Collection (Make-up work?) This Week… Dating Review Death and Preservation Guided and independent practice Tomorrow’s Performance Task… Summary/ questions/ feedback

Paper return/ Grade Sheet Update Your Name Class/Period Miss Krichten Grade Sheet No. Name of Assignment Unit Name Date Points Earned 1. How Do You Know Inquiry 8/6/15 2. Science / Observations 8/7/15 3. Measurement 8/11/15 4. Scientific Method Quiz 8/17/15 5. 1st Attempt: Fossil Model 8/19/15

This Week… Culminating in a single project Responsible to work at home Establishing controls and testing variables All in the intro to start us off Teaching one another what we care about most Ending with pride, ownership for your experiments

What do we need to understand? What knowledge should we know to understand how animals fossilize/ get buried and left behind? Environments, Grass/Soil, Weather, & Water Cycle Where/why bones are found, what happens to them Where animals live/ normal diet, animals vs. humans Fossil and animal ID and types Graves Time Scale and Dating How/where things die, extinctions/why, & decomposition (what/how long) Preservation (freezing, amber, ash, etc.) Which animals fossilize/how

Dating Review: Do-Now List all the ways you can date something or determine how old it is.

Dating rings… The usefulness of teeth and other bones…

Carbon Dating Half-Lives       Years Past     C-14Atoms         0    1 N 1  5,730 1/2 N 2 11,460 1/4 N 3 17,190  1/8 N 4 22,920 1/16 N 5 28,650 1/32 N 6 34,380 1/64 N 7 40,110 1/128 N  Dating samples are usually charcoal, wood, bone, or shell, but any tissue that was ever alive can be dated Following death, no new carbon is consumed.  Progressively through time, the carbon-14 atoms decay Half-life of carbon-14 is about 5,730 years Discuss the pros and cons of using carbon dating techniques 

Location, Location, Location Fossilization

Decomposition Scavengers Insects Bacteria and Fungi Materials like carbon and nitrogen return to the soil or air and back into other living things

Decomposition Temperature Drops 3-6 hours: muscles stiffen Blood pools Acidity rises, breaks down tissue on the inside Bacteria multiply then insects Gases cause bloat, oozing Maggots and disintegration All that remains of the cadaver at this stage is dry skin, cartilage, and bones Plant growth

Extinctions: A Reset Button? Asteroid impacts Climate change Volcanoes Glaciation Sea Rise K-T extinction

Preservation

Tomorrow: Performance Task Rubric