Explain how crater counts allow us to estimate the ages of surfaces throughout the solar system
What will be an ideal response?
Craters are the rule...everybody was a target in the early days of accretion. The longer the surface has sat without internal deformation, the more impacts have cratered the surface. If craters are absent, it is because other processes, such as lava flows or erosion, have replaced the older cratering.
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A ball thrown into the air follows a parabolic trajectory. At the highest point in the trajectory
A. both the velocity and the acceleration are zero. B. the velocity is zero, but the acceleration is not zero. C. neither the acceleration nor the velocity are zero. D. the acceleration is zero but the velocity is not zero.
Regular atoms did not show up in the universe until when?
What will be an ideal response?
Suppose that the temperature of the solar nebula had been much colder. How might the Solar System look different today?
A) Terrestrial planets may have formed at a larger distance from the Sun. B) The gas giant planets might be bigger and farther from the Sun. C) The gas giant planets might be bigger and closer to the Sun. D) More planets would have formed.
Two pistons push down on the fluid filling two cylinders connected by a narrow hose, as shown in the figure. The area A1 is 1 square inch, and the area A2 is 10 square inches. A force of 4 pounds is exerted downward on piston 1, as shown
 The pressure on A2 is 40 psi. a. True b. False