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Warm Up 9/17/08 1) A scientific hypothesis can become a theory if ____. a. the entire scientific community accepts it b. the hypothesis is tested extensively.

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Presentation on theme: "Warm Up 9/17/08 1) A scientific hypothesis can become a theory if ____. a. the entire scientific community accepts it b. the hypothesis is tested extensively."— Presentation transcript:

1 Warm Up 9/17/08 1) A scientific hypothesis can become a theory if ____. a. the entire scientific community accepts it b. the hypothesis is tested extensively and competing hypotheses are eliminated c. there are no other competing hypotheses d. the hypothesis can be tested at least once 2) According to the nebular hypothesis, our solar system formed from a huge rotating cloud made mostly of ____. a. carbon and hydrogenc. oxygen and helium b. helium and hydrogen d. nitrogen and oxygen 3) What is the study of the atmosphere and the processes that produce weather and climate? a. oceanographyc. meteorology b. geologyd. astronomy Answers: 1) b. 2) b. 3) c.

2 A View of Earth Chapter 1, Section 2

3 Earth’s Major Spheres Earth can be thought of as consisting of four major spheres: the hydrosphere, atmosphere, geosphere, and biosphere Earth can be thought of as consisting of four major spheres: the hydrosphere, atmosphere, geosphere, and biosphere Hydrosphere – the water portion of Earth Hydrosphere – the water portion of Earth Atmosphere – the gaseous portion of a planet; the planet’s envelope of air Atmosphere – the gaseous portion of a planet; the planet’s envelope of air Geosphere – layer of Earth under both the atmosphere and the oceans Geosphere – layer of Earth under both the atmosphere and the oceans Because the geosphere is not uniform, it is divided into three main parts based on differences in composition—the core, the mantle, and the crust Because the geosphere is not uniform, it is divided into three main parts based on differences in composition—the core, the mantle, and the crust Biosphere – all life on Earth; the parts of the solid Earth, hydrosphere, and atmosphere in which living organisms can be found Biosphere – all life on Earth; the parts of the solid Earth, hydrosphere, and atmosphere in which living organisms can be found

4 Earth’s Layered Structure

5 Concept Check What are Earth’s four major spheres? What are Earth’s four major spheres? The hydrosphere, atmosphere, geosphere, and biosphere The hydrosphere, atmosphere, geosphere, and biosphere

6 Plate Tectonics There are two types of forces affecting Earth’s surface There are two types of forces affecting Earth’s surface Destructive forces such as weathering and erosion work to wear away high points and flatten out the surface Destructive forces such as weathering and erosion work to wear away high points and flatten out the surface Constructive forces such as mountain building and volcanism build up the surface by raising land and depositing new material in the form of lava Constructive forces such as mountain building and volcanism build up the surface by raising land and depositing new material in the form of lava The theory that finally emerged, called plate tectonics, provided geologists with a model to explain how earthquakes and volcanic eruptions occur and how continents move The theory that finally emerged, called plate tectonics, provided geologists with a model to explain how earthquakes and volcanic eruptions occur and how continents move

7 Earth’s Major Plates

8 Concept Check What is the difference between destructive forces and constructive forces? What is the difference between destructive forces and constructive forces? Constructive forces build up the surface material, whereas destructive forces destroy surface material Constructive forces build up the surface material, whereas destructive forces destroy surface material

9 Assignment Read Chapter 1, Section 2 (pg. 6-10) Read Chapter 1, Section 2 (pg. 6-10) Do Chapter 1 Assessment #1-36 (pg ) Do Chapter 1 Assessment #1-36 (pg ) For Section 2: Do #’s 3, 9, 12, 13, 24-26, 34, 36 For Section 2: Do #’s 3, 9, 12, 13, 24-26, 34, 36

10 ASSIGNMENT: Create a COMIC POSTER: (15 pts) Create a COMIC POSTER: (15 pts) Use page 4 of Text 6 Frames. 6 Frames. 6 captions. 6 captions. 6 COLOR drawings that illustrate each phase of Nebular Hypothesis 6 COLOR drawings that illustrate each phase of Nebular Hypothesis DUE: TURN-IN End of Period. DUE: TURN-IN End of Period. 2.5 pts = Captions 2.5 pts = Captions 10 pts = Illustrations…use color!!! 10 pts = Illustrations…use color!!! 2.5 pts = Effort 2.5 pts = Effort


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