Monday 1/22/18 Copy this week’s schedule into your assignment notebook. Notebook Entry: What do you think the word biodiversity means? Hint: break the word into smaller parts and see if you recognize those parts. Do the smaller parts sound like other words you know?

What do fossils tell us? The fossil record provides evidence of the past The conditions of past environments That different groups of organisms have changed over time

Geologic Time Scale Fossils are clues in the story of Earth’s past. But for the story to make sense, the clues need to be arranged in order. This is where we rely on the analysis of rock layers to help us determine the order.

Fossil Stories Online Activity Go to Mrs. Burke’s webpage and click on Unit 4 Geologic Time In the box that appears below the list of units will be a section titled “LINKS” Click on the link for Understanding Geologic Time Before we start this portion we need to identify what the questions are asking us. Keep a list of science words that you see that you don’t know the meaning.

Tuesday 1/23/18 Notebook Entry: These two scientists are standing near rock layers that have high levels of iridium; an element more common in asteroids than in Earth rock. The rock dates at 65 million years ago. What do you think the high levels of iridium might tell us about Earth’s past?

Geologic Time Scale Record of geologic events and the evolution of life forms over Earth’s 4.6 billion year history. Developed in late 1700s and early 1800s. Based on study of rock layers, fossils, and major events in Earth’s history. Start video clip at 4:40

Evidence for Asteroid Impact? In the March 5, 2010 edition of the journal Science, an international panel of 41 experts in geology, paleontology  and other related fields, after an exhaustive review of the data, declared an end to a 30 year controversy over what triggered the extinction of the dinosaurs – an asteroid or volcanoes. The panel ruled in favor of the asteroid, a theory first put forth in 1980 by one of Berkeley Lab’s greatest scientists, the late Nobel laureate Luis Alvarez, and his son Walter, a geologist with UC Berkeley. Walter Alvarez was collecting samples of limestone rock for a paleomagnetism study. The limestone rock outside of Gubbio, Italy, which was once below the sea, provides a complete geological record of the end of the Cretaceous period and the beginning of the Tertiary period.  Luis (left) and Walter Alvarez at the K-T Boundary in Gubbio, Italy 1981 (Photo from Berkeley Lab archives)

Fossil Stories Online Activity Before we start today portion we need to identify what the questions are asking us. Keep a list of science words that you see that you don’t know the meaning. Put the list at the bottom of your first page.

Fossil Stories Online Activity Continuing working on Understanding Geologic Time – at ______ we will discuss our answers to this portion. If you finish before we discuss you can work one of the following: Read and do pages 120-123. I will be checking this tomorrow and you can earn an extra point for highlighting or annotating the text. Work ahead on the next portion of the activity. Go back to my page and click on the second link “Stories from the Fossil Record”

Wednesday 1/24/18 Notebook Entry: Look back at the My Planet Diary from yesterday’s homework. Would you say that Earth’s history has consisted mostly of the existence of people or bacteria? http://weknowyourdreams.com/people.html http://www.cmif.osu.edu/Microscopy-SEM

We can use exact ages to get a more specific age of fossils. http://geol.queensu.ca/museum/index.php?option=com_content&view=article&id=54&Itemid=61 https://evolution.berkeley.edu/evolibrary/article/radiodating_01

Fossil Stories Online Activity Complete pages 2-3: use the link “Stories from the Fossil Record” I will be coming around to check your reading assignment. (pages 120-123)

Thursday 1/25/18 Notebook Entry: Watch the BrainPop video that summarizes the main points we have been studying about the Geologic Time Scale. Record two new pieces of information you learn from the video. https://www.brainpop.com/science/earthsystem/geologic time/

What to study for your test Geologic Laws of Relative Dating- know how to interpret rock layers and explain with evidence and reasoning 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.

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 5 minutes you will swap with a classmate and quiz them using your rock sequence.

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

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. Group the evidence into two categories: major geologic events & large changes in biodiversity. Do you think these types of evidence are sufficient (enough, appropriate, satisfactory) to support the model of geologic time?

Take your Arch Book, Spiral Notebook and Packets to STUDY