We can study how galaxies evolve because
A) galaxies are transparent to visible light.
B) we are really smart astronomers.
C) we can watch as they interact in real time.
D) the farther away we look, the further back in time we see.
D
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Which of the following lists foliated metamorphic rocks is in order from lowest to highest grade?
What will be an ideal response?
The lunar surface cools after the Sun sets. This is an example of
a. heat conduction. b. heat convection. c. heat radiation. d. thermal expansion. e. none of the above.
A hydrogen nucleus, which has a charge +e, is situated to the left of a carbon nucleus, which has a charge +6e. Which statement is true?
A) The electrical force experienced by the hydrogen nucleus is to the left, and the magnitude is equal to the force exerted on the carbon nucleus. B) The electrical force experienced by the hydrogen nucleus is to the left, and the magnitude is greater than the force exerted on the carbon nucleus. C) The electrical force experienced by the hydrogen nucleus is to the left, and the magnitude is less than the force exerted on the carbon nucleus. D) The electrical force experienced by the hydrogen nucleus is to the right, and the magnitude is equal to the force exerted on the carbon nucleus.
Scientific equations in a conceptual course are mainly
A) recipes for plugging in numerical data. B) guides to thinking about the relationships between concepts. C) for mathematical problem solving. D) unfortunately a confusing way of explaining ideas.