Tonight’s HW: (write it down) 1.Frayer Models 2.Syllabus (if needed) 3.Lab Safety Contracts (if needed) DO NOW RADD: How old are you? How old do you think I am? How old do you think Earth is? How do you know? HW DUE TODAY 1.Lab Reports 2.Syllabus (if needed) 3.Lab Safety Contracts (if needed) Tuesday, September 1, 2015 CHAMPS: Conversation level is zero. Movement is zero. Activity is your Do Now. Raise your hand if you have any questions. ~AGENDA~ ❑ Do Now (3 minutes) ❑ Do Now/HW Check ❑ HW Review/Correct ❑ Trade and Grade ❑ Earth’s History ❑ Homework Expectations ❑ Clean Up/Exit

SWBAT: Define key vocabulary in the Earth’s History module by completing segmented PowerPoints. Standard: ESS1-4: Construct a scientific explanation based on evidence from rock strata for how the geologic time scale is used to organize Earth’s history. Attack Strategy: Text Based Reading

How old do you think Earth is? 4.6 billion years! 4,600,000,000 Divided into 4 “eras”: – Paleozoic – Precambrian – Mesozoic – Cenozoic Era- a major division of geological time usually divided into two or more periods Period- marked by distinctive characteristics or events

How do scientists know this?

Fossils Fossils (from the Classical Latin word fossilis; means, "obtained by digging") They are the preserved remains or traces of animals, plants, and other organisms from the remote past. Their position in the rock formations and sedimentary layers (strata) is known as the fossil record. The observation that certain fossils were associated with certain rock strata led early geologists to recognize a geological timescale in the 19th century.

Relative or Absolute Relative Dating Unless something has happened, the newer strata will be on top of older ones. Based on the Rule of Superposition, certain organisms clearly lived before others, during certain geologic times. Absolute Dating Radioactive activity allows geologists to determine the numerical or "absolute" age of the various strata and thereby the included fossils as young as 10,000 years old up to 3.48 billion years old. Absolute age dating is like saying you are 15 years old and your grandfather is 77 years old. Relative age dating is like saying that your grandfather is older than you.

The cyanobacteria have an extensive fossil record. The oldest known fossil, is a cyanobacteria from the Archaean rocks of western Australia, dated 3.5 billion years old. This may be somewhat surprising, since the oldest rocks are only a little older: 3.8 billion years old!

Like the extinct organisms that they come from, fossils vary in size from microscopic, single bacterial cells one micrometer in diameter, to gigantic, such as dinosaurs and trees many meters long and weighing many tons. A fossil normally preserves only a portion of the deceased organism, usually that portion that was partially mineralized during life, such as the bones and teeth. Fossils may also consist of the marks left behind by the organism while it was alive, such as animal tracks or feces (coprolites). – These types of fossil are called trace fossils

How long was this era? 544 MYA MYA 299 MYA 4,056 million years!

22 meters or feet If this =5 meters, then Sauraposeidon is______ long. the

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RADD: Explain what a geological timeline is and how it relates to Earth’s History..

Homework Complete Frayer Models

Tonight’s HW: (write it down) 1.Personal Timeline 2.Syllabus (if needed) 3.Lab Safety Contracts (if needed) DO NOW RADD: What are fossils and how are they made? HW DUE TODAY 1.Frayer Models 2.Syllabus (if needed) 3.Lab Safety Contracts (if needed) Wednesday, September 2, 2015 CHAMPS: Conversation level is zero. Movement is zero. Activity is your Do Now. Raise your hand if you have any questions. ~AGENDA~ ❑ Do Now (3 minutes) ❑ Do Now/HW Check ❑ HW Review/Correct ❑ Earth’s History ❑ Homework Expectations ❑ Clean Up/Exit

SWBAT: Relate a geological timeline of Earth’s History to a timeline of their own history by constructing a personal timeline. Standard: ESS1-4: Construct a scientific explanation based on evidence from rock strata for how the geologic time scale is used to organize Earth’s history. Attack Strategy: Text Based Reading

RADD: What is the difference between and era and a period?.

Homework Create a timeline based on your life.

Timeline Examples

Tonight’s HW: (write it down) 1.Geologic Timeline 2.Syllabus (if needed) 3.Lab Safety Contracts (if needed) DO NOW RADD: What are fossils and how are they made? HW DUE TODAY 1.Personal Timeline 2.Syllabus (if needed) 3.Lab Safety Contracts (if needed) Thursday, September 3, 2015 CHAMPS: Conversation level is zero. Movement is zero. Activity is your Do Now. Raise your hand if you have any questions. ~AGENDA~ ❑ Do Now (3 minutes) ❑ Do Now/HW Check ❑ HW Review/Correct ❑ Earth’s History ❑ Geologic Timeline Activity ❑ Homework Expectations ❑ Clean Up/Exit

SWBAT: Classify Earth’s History by completing a geologic timeline using eras and periods. Standard: ESS1-4: Construct a scientific explanation based on evidence from rock strata for how the geologic time scale is used to organize Earth’s history. Attack Strategy: Text Based Reading

RADD: Explain how geologist used relative and absolute dating to create the timeline of Earth’s History..

Homework Create a timeline based on Earth’s history.