Monday 3/18/19 Copy this week’s schedule into your assignment notebook. Bell Ringer: 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 Before you start working you need to pre-read what the questions are asking you. Go to Mrs. Burke’s webpage and click on Unit 6 Geologic Time In the box that appears below the list of units will be a section titled “LINKS” Today you will using the link for Understanding Geologic Time Answers must be in complete sentences. If you come across a word you don’t know the meaning of pause and look it up.

Tuesday 3/19/19 Bell Ringer: 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 Continuing working on Understanding Geologic Time – at ______ we will discuss our answers to this portion. If you finish before we discuss you can 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 3/20/19 Bell Ringer: 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/

Fossil Stories Online Activity Complete pages 2-3: use the link “Stories from the Fossil Record” When you finish turn in your packet. Begin working on the homework assignment. Read and do pages 120-123. Highlight or mark the main ideas and supporting details.

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 existence of people or bacteria? http://weknowyourdreams.com/people.html http://www.cmif.osu.edu/Microscopy-SEM

What to study for your test Fossils – know the ways in which fossils form 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.

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