Composite volcanoes are also known as ________
A) shield volcanoes
B) stratovolcanoes
C) cinder cones
D) hot spots
Answer: B
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A scientist identifies a rock sample as basalt. Why did he do so?
A) He observed that the rock has a lot of silica, making it mafic. B) He observed that the rock has a lot of silica, making it ultra-mafic. C) He observed that the sample has little silica, making it felsic. D) He observed that the sample has little silica, making it mafic.
What caused Earth to partially melt when being formed?
a. Impact of asteroids, comets, and debris b. Gravitational compression c. Accumulation of decaying radioactive elements d. A combination of all of these choices
Different isotopes are useful in different dating processes. Suppose we wished to determine the age of an object which we suspect to be approximately 10,000 years old. An isotope with which of the following half-lives would be most appropriate for this project?
A) 50 years B) 500 years C) 5,000 years D) 50,000 years
There are websites that predict solar weather, or essentially the impact of the solar wind on earth (in one sense, our planet is within the outer atmosphere of the sun). How is this possible when the speed of light is a fixed quantity?
A) The solar weather is related to sunspots, and they only affect Earth when the sunspots are in line with the earth, so knowing the solar rotation speed, you can predict when sunspots are aimed at Earth. B) The solar weather effect on Earth depends largely on the earth's magnetic field and its interaction with Earth weather, so scientists predict variations in both. C) The solar wind does not travel at the speed of light, so it arrives much later than when a solar event is observed. D) The solar forecast is like weather forecasting on Earth; solar scientists observe phenomena as they form and grow on the sun, and predict their timing