'Index fossils' diaporamas de présentation

Quick facts to Pass the SOL

Quick facts to Pass the SOL. 1. The same substance always has the same density regardless of size. 2. As pressure increases, density increases. 3. As temperature increases, density decreases 6. Water is most dense at 4 o C, when it is a liquid. 4. Water expands when it freezes.

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Section 3.1

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Chapter 17 The History of Life

Chapter 17 The History of Life. Section 17-1 The Fossil Record. Fossils & Ancient Life. Paleontologists Scientists Who Study Fossils Infer What Past Life Looked Like What They Ate & What Ate Them Behavior Environment They Lived In. What They Looked Like. What They Ate.

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Chapter 12: The History of Life

Chapter 12: The History of Life. 12.1: The Fossil Record. Objectives: Describe the ways that fossils can form. Identify the use of relative dating and absolute dating techniques. Warm Up: What are some of the ancient life forms you remember?

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Understanding Geologic Time

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Big Idea 1

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The Geologic Time Table

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Change Over Time

Change Over Time. Evolution: Change Over Time. Age of earth 4.55 billion years (rocks dated on earth 3.8 to 3.9 billion by decay of their radioactive elements) Life began 3.9 to 4.1 billion years ago Life forms have evolved over a long period of time

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What are the 2 methods of dating in Geologic Time?

What are the 2 methods of dating in Geologic Time?. __________ and _______________ studied features preserved in rocks & present-day geologic processes. Why is Sir Charles Lyell important? Uniformitarianism ?. Seven principles of relative dating: . . . . . . .

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Wednesday January 9, 2013

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FOSSILS

FOSSILS. Think About It . . . . Can you name any dinosaurs? Do you know what they looked like or how they moved? Scientists have been able to tell us many things about organisms (such as dinosaurs) that lived millions of years ago.

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Fossils

Fossils. Vocabulary. Fossil Molds and Casts Films Mineral replacement Amber Brachiopod Trilobite Dinosaur Index Fossil. Fossils. Fossils are cool little pictures to our past. To be a fossil it must: Once been alive Now Dead Buried in sediment No longer of interest to bacteria.

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Evolution

Evolution. To see where we might be going, we must understand where we have been Robert Tamarkin, 1993. What is Evolution ?. Theory supported by evidence Biological evolution - changes in living organisms Sharing of common ancestors (branched tree of life)

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7.2.6 e1 Rock Mystery

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Absoulte dating

Is a process of establishing the age of an object, such as a fossil or rock layer, by determining the number of years that is exsisted. Absoulte dating. Radioactive Decay. Radioactive isotopes tend to break down into stable isotopes of other elements in a process Radioactive Decay

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Finding Relative Age of Rocks

Finding Relative Age of Rocks. Relative and Absolute Ages. 1. The relative age of a rock is its age compared to the ages of other rocks. 2. The absolute age of a rock is the number of years since the rock formed.

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Station #1: Reading the Geologic Time Scale

Materials Needed: Student Worksheet 2 computers set to this slide so the students can use the links. Station #1: Reading the Geologic Time Scale. A nswer the questions u sing the geologic time scale on these websites Enchanted Learning Geologic time scale

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The Fossil Record

The Fossil Record. Chapter 19. Fossils and Ancient Life. Fossil = Preserved remains of an organism or evidence of the presence of an organism Types of Fossils: Preserved body structures Skeleton Teeth or jawbones Pieces of a leaf Trace fossils leaf imprints Tracks Burrows

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Index fossils

Index fossils. Some fossils are typical at a particular time segment. Useful in identifying the relative age of the rock in which they occur. Help us to identify geologic time periods. Four characteristics: 1. Must be easily recognized - Unique 2. Widespread in occurrence

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