4. What is the difference between a hypothesis and a theory? (0.5 pt) a. A hypot

Question

4. What is the difference between a hypothesis and a theory? (0.5 pt)

a. A hypothesis is an educated guess to explain why something happens. A theory is proposed after the hypothesis has been tested, but scientists are very uncertain of its validity.

b. A theory is an “idea” to explain why something happens. A hypothesis is proposed after scientists become more certain of its validity.

c. A hypothesis is an educated guess to explain why something happens. A theory is proposed after the hypothesis has been tested and scientists become more certain of its validity.

6. What is plate tectonics? Pick the best answer. (1 pt)

a. Plate tectonics is a theory that explains the geologic processes by which the Earth’s crust is formed, moved, and transformed. It asserts that the Earth’s surface is composed of plates that float upon the asthenosphere, spreading apart in various directions and colliding and grinding against one another over an extended period of time. Despite Alfred Wegener’s studies of Continental Drift in the early twentieth century, the theory of Plate Tectonics was not established until the 1960s. Before then, most geologists thought that the continents had stayed in their original position.

b. Plate tectonics is a principle that explains the geologic processes by which the Earth’s crust is formed, moved, and transformed. It asserts that the Earth’s surface is composed of plates that float upon the asthenosphere, spreading apart in various directions and colliding and grinding against one another over an extended period of time. Despite Alfred Wegener’s studies of Continental Drift in the early twentieth century, the principle of Plate Tectonics was not established until the 1960s. Before then, most geologists thought that the continents had stayed in their original position.

c. Plate tectonics is a theory that explains the geologic processes by which the Earth’s crust is formed, moved, and transformed. It asserts that the Earth’s surface is composed of plates that float upon the asthenosphere, spreading apart in various directions and colliding and grinding against one another over an extended period of time. Despite Alfred Wegener’s studies of Continental Drift in the early nineteenth century, the theory of Plate Tectonics was not established until the 1860s. Before then, most geologists thought that the continents had stayed in their original position.

d. a. Plate tectonics is a principle that explains the geologic processes by which the Earth’s crust is formed, moved, and transformed. It asserts that the Earth’s surface is composed of plates that float upon the asthenosphere, spreading apart in various directions and colliding and grinding against one another over an extended period of time. Despite Alfred Wegener’s studies of Continental Drift in the early twentieth century, the principle of Plate Tectonics was not established until the 1860s. Before then, most geologists thought that the continents had stayed in their original position.

Explanation / Answer

Question 4) Answer) option c)

Reason : A hypothesis is an educated guess to explain why something happens. A theory is proposed after the hypothesis has been tested and scientists become more certain of its validity.

Question 6 ) answer) option a)

Reason : Plate tectonics is a theory that explains the geologic processes by which the Earth’s crust is formed, moved, and transformed. It asserts that the Earth’s surface is composed of plates that float upon the asthenosphere, spreading apart in various directions and colliding and grinding against one another over an extended period of time. Despite Alfred Wegener’s studies of Continental Drift in the early twentieth century, the theory of Plate Tectonics was not established until the 1960s. Before then, most geologists thought that the continents had stayed in their original position.

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