Rank the following 4 items by how long it takes for light to reach us from these objects, from shortest to longest
A) Pluto, Sun, the Andromeda Galaxy, center of the Milky Way
B) Sun, Pluto, center of the Milky Way, the Andromeda Galaxy
C) the Andromeda Galaxy, the center of the Milky Way, Pluto, Sun
D) Pluto, Sun, center of Milky Way, the Andromeda Galaxy
E) Sun, Pluto, the Andromeda Galaxy, center of the Milky Way
B
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Which of the following best describes the current status of the evidence concerning whether life has ever existed on Mars?
A) Mars probably once had a habitable surface, but we do not know if it had life. B) Clear evidence strongly suggests that life once existed on Mars. C) Clear evidence indicates that Mars never had conditions favorable to life. D) Although current evidence is mixed, ongoing studies should ensure that we will have a definitive answer to the question of whether life ever existed on Mars within about five years.
Look at the average densities of the jovian planets given in the figure. Can you identify a trend in jovian planet densities with mass or distance from the Sun?
a. The more massive the planet, the lower the density. b. The densities increase in order of distance from the Sun. c. There is no clear trend in the densities with mass or distance. d. The densities decrease in order of distance from the Sun. e. The more massive the planet, the higher the density.
If we imagine the history of the universe compressed into one year, dinosaurs became extinct ________
A) about an hour ago B) about 6 months ago C) about 3 weeks ago D) yesterday morning
What would happen to the core of the sun if its temperature rose slightly?
A) The rate at which fusion occurs would increase, leading to a contraction of the core, which would in turn cause the temperature to rise even further. B) The rate at which fusion occurs would decrease, leading to a contraction of the core, which would in turn cause a further temperature rise. C) The rate at which fusion occurs would decrease, leading to an expansion of the core, which would in turn cause the temperature to drop back down. D) The rate at which fusion occurs would increase, leading to an expansion of the core, which would in turn cause the temperature to drop back down.