During the Mesozoic, the supercontinent of Gondwanaland fragmented into the continents of
A) North America, Europe, and Asia.
B) South America, Africa, Antarctica/Australia, and India/Madagascar.
C) North America, Europe, and Africa.
D) South America, Africa, and Europe/Asia.
Answer: B
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Groombridge 34 is an M1 V star. Based on this information, which of the following are true? I. Groombridge 34 has a surface temperature that is less than the Sun. II. Groombridge 34 has a mass that is greater than that of the Sun. III. Groombridge 34 is less luminous than the Sun. IV. Groombridge 34 is located near the middle of the H-R diagram
a. I & II b. II & IV c. I & IV d. I & III e. II & III
Ridges in the middle of the ocean are places where
A) one plate slides under another, returning older crust to the mantle. B) hot mantle material rises upward, creating volcanic islands. C) hot mantle material rises upward and spreads sideways, pushing the plates apart. D) plates push together, creating ocean mountain chains. E) plates slip sideways relative to one another.
Describe several features on the Earth's crust explained by plate tectonics
What will be an ideal response?
A 7.0-kg bowling ball experiences a net force of 6.0 N. What will be its acceleration?
a. 0.86 m/s2 c. 7.0 m/s2 b. 6.0 m/s2 d. 42 m/s2