OCB1010 review question 1-4

OCB1010 review question 1-4 - Test 1 Chapters 1 through 4...

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Test 1 – Chapters 1 through 4 Chapter 1 1. Explain the scientific method: The set of procedures by which scientists learn about the world. 2. What is the difference between a hypothesis and a theory? A hypothesis is a statement that might be true, while a theory is a hypothesis that has passed so many tests that it is generally regarded as true. 3. What is the difference between a variable and a control? Variables are factors that might affect observation, while a control is a variable that is prevented from affecting the observations. Chapter 2 1. What is an ocean basin? The ocean basin is one of four large ocean formations on earth. 2. What are the major ocean basins? The Pacific, the Atlantic, the Indian and the artic. 3. What is the world ocean? The idea that all the oceans are interconnected and as a result are one. 4. Why is density important to the formation of the earth? The densest material settled toward the center of the earth and the least dense material, settled farther away, for example: Water and atmosphere. 5. Describe the interior structure and layers of the Earth. The first is the Core, and it’s made up of a mixture of irons and alloy, at a pressure a million times the surface of the earth at a temperature of 4000 degrees Celsius. Next comes the Mantle which is made up of semi liquid rock that flows like a thick viscous solution. The topmost layer is the crust which is a rigid layer floating above the mantle. The crust is also the part of the earth that we inhabit. 6. What are the major characteristics of the crust, mantle, and core? See above. 7. What is the difference between oceanic crust and continental crust? Oceanic crust is mostly made up of basalt and is dark in color with deposits of iron and magnesium while continental crust is mostly made up
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of Granite which is light in color with deposits of sodium, potassium, calcium and aluminum. 8. Explain continental drift and the theory of plate tectonics. Continental drift is when the continents drift apart and into each other riding the plates that float on the mantle, which interlock to make up the crust. Plate tectonics is the theory that explains how and why the plates move. 9. What is the mid-ocean ridge? How is it formed? The mid ocean ridge is a continuous chain of submarine volcanic mountains that encircle the globe. It was formed by colliding plated pushing up into each other. 10. How is the earth’s magnetic field produced? 11. What is seafloor spreading? How is seafloor created? Seafloor is formed as magma under pressure flows up from rifts formed in the crust as pieces of oceanic crust separate at the mid ocean ridges. 12. What are lithospheric plates? The lithosphere is the rigid part of crust and upper mantle that floats on top of the mantle, it’s broken up into interlocking “ithospheric plates” on which the individual continents and landmasses are located. 13.
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OCB1010 review question 1-4 - Test 1 Chapters 1 through 4...

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