Thursday 3/21/19 Bell Ringer: Look back at the My Planet Diary from yesterday’s homework. Would you say that Earth’s history has consisted mostly of the presence of people or bacteria? http://weknowyourdreams.com/people.html http://www.cmif.osu.edu/Microscopy-SEM

Geologic Time Scale The time scale on the right shows the key pieces of evidence that scientists use to divide up the geologic time scale.

What to study for your test Fossils ways in which fossils form different types Geologic Laws of Relative Dating- interpret sequence of rock layers explain with evidence and reasoning (geologic law) Geologic Time Scale how are fossils and rock layers used to describe Earth’s history how are exact ages used to estimate ages of fossils.

Fossil Review – Quiz your self! Quizlet – link on my webpage Go to unit 6 and today’s date Click on the quizlet You will see choices for different ways to quiz yourself. Do the FLASHCARDS first to review. Next do the TEST. Some may be about facts we have not studied. Those ones will not be on the test tomorrow. Try the MATCH

How old are the two fossils (A & B) contained in these rock layers How old are the two fossils (A & B) contained in these rock layers? Explain how you were able to come to this conclusion. 495 mya A 510 mya 520 mya B 545 mya http://geol.queensu.ca/museum/index.php?option=com_content&view=article&id=54&Itemid=61 https://evolution.berkeley.edu/evolibrary/article/radiodating_01

Pick 2 rock layers. Describe the story of each rock layer Pick 2 rock layers. Describe the story of each rock layer. How was it originally? How has it changed. What is it’s relative age? Include the appropriate geologic laws in your story of each layer.

Now make your own rock layer diagram Create a rock layer diagram that uses two different geologic laws to figure out the sequence. In 8 minutes you will swap with a classmate and quiz them using your rock sequence.

Take your 1. Arch Book 2. Spiral Notebook 3 Take your 1. Arch Book 2. Spiral Notebook 3. Investigation Packets to STUDY