21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 8, Problem 18QP
To determine
The reason for scientists know that rock layers at the lowermost of the Grand Canyon are older than those originate on the rim.
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A new Terrestrial planet has been discovered orbiting a
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of this planet and determined that the atmosphere is
composed of roughly 99% CO2, and the remaining 1% is
mostly N2 and is very thin compared to Earth's
atmosphere. Briefly describe how the planet could have
developed such an atmosphere.
Planetary scientists are excited about the possibility that some of the moons in the outer solar system might have a global subsurface ocean of liquid water.
It's uncertain whether or not Jupiter's moon Callisto has a subsurface ocean, but some scientists think it might.
Let's imagine that a short distance below the surface, Callisto has a water layer 20,000 meters thick. Callisto has a radius of 2.410x106 meters.
Earth has a radius of 6.378x106 meters, and its oceans are equivalent to a layer of water 3000 meters thick all over the surface of the planet.
Which of the following is an accurate comparison of the Earth’s amount of liquid water with this estimate of the amount of water Callisto might have?
Group of answer choices
If this scenario is correct, Earth and Callisto have roughly the same amount of liquid water.
If these scientists are right, Callisto has about one-sixth as much liquid water as the Earth does.
If these scientists are right, Callisto has about 11 times as…
The iron meteorite that created Barringer Crater (Arizona) was 50 m in diameter. It caused a crater 1.2 km (1200 m) in diameter, that is, 24 times bigger than the impactor. Keeping in mind that the size of the crater depends on many factors, such as the type of rocks present in the area, estimate the approximate size of the impactor that produced Mare Serenitatis.
Chapter 8 Solutions
21st Century Astronomy
Ch. 8.1 - Prob. 8.1CYUCh. 8.2 - Prob. 8.2CYUCh. 8.3 - Prob. 8.3ACYUCh. 8.3 - Prob. 8.3BCYUCh. 8.4 - Prob. 8.4CYUCh. 8.5 - Prob. 8.5CYUCh. 8.6 - Prob. 8.6CYUCh. 8 - Prob. 1QPCh. 8 - Prob. 2QPCh. 8 - Prob. 3QP
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- Which of the following statements are true? Choose all that apply. If light from a star passes through an exoplanet's atmosphere, we can look at the absorption spectra to determine what elements & compounds are in the atmosphere. The reason astronomers want telescopes with large primary mirrors is to gather as much light as possible. In crown glass, the index of refraction for red light is 1.512 and for yellow light it is 1.518. Thus in crown glass, red light is slower than yellow light. If the axes of two polarizers are anti-parallel to each other, then no light will get through. The glasses for nearsighted people create real images for them to see. The larger the diameter of an optic is, the smaller the minimum angle it can discern is.arrow_forwardIn 2015, researchers concluded that Enceladus's subsurface ocean is probably global, instead of just being restricted to the south polar region. What had the Cassini spacecraft found, that led them to their conclusion? a Enceladus wobbles slightly as it orbits Saturn, more so than it could if its ice shell were mostly frozen to the rocky interior. b Enceladus is absorbing so much water (which is ejected by Saturn from its atmosphere) that there must be a global ocean under its icy surface. c The number of large, lava-spewing volcanoes on Enceladus's surface is so high that they can only be the result of liquid water under the whole surface. d The magnetic field of Enceladus is so strong that it can only be explained by a global ocean of salty water under the surface.arrow_forward
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