Astronomy
1st Edition
ISBN: 9781938168284
Author: Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher: OpenStax
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Textbook Question
Chapter 8, Problem 19E
Which type of object would likely cause more damage if it struck near an urban area: a small metallic object or a large stony/icy one?
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2. Now at roughly 100% of present-day mass and the asteroid bombardment over, Earth begins
cooling and differentiating. As the outer layer of the Earth cools and solidifies, lighter elements
and compounds rise to the surface while the denser ones sink to the core
3. The now differentiated ice, gas, and dust of the solar accretion disc conglomerates together into
asteroids from gravity
4. "The Big Whack"
A Mars-sized protoplanet we call Theia collides with primitive Earth, adding even more energy
and mass
5. The Big Bang
6. As the early atmosphere cools, water vapor is eventually cool enough to condense into liquid
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7. The debris from the collision of Earth and Theia produce a ring in orbit. This ring eventually
coalesces into the Moon, just as Earth coalesced from the solar accretion disc
8. A nebula…
Chapter 8 Solutions
Astronomy
Ch. 8 - What is the thickest interior layer of Earth? The...Ch. 8 - What are Earth’s core and mantle made of? Explain...Ch. 8 - Describe the differences among primitive, igneous,...Ch. 8 - Explain briefly how the following phenomena happen...Ch. 8 - What is the source of Earth’s magnetic field?Ch. 8 - Why is the shape of the magnetosphere not...Ch. 8 - Although he did not present a mechanism, what were...Ch. 8 - List the possible interactions between Earth’s...Ch. 8 - List, in order of decreasing altitude, the...Ch. 8 - In which atmospheric layer are almost all...
Ch. 8 - What is, by far, the most abundant component of...Ch. 8 - In which domain of living things do you find...Ch. 8 - Describe three ways in which the presence of life...Ch. 8 - Briefly describe the greenhouse effect.Ch. 8 - How do impacts by comets and asteroids influence...Ch. 8 - Why are there so many impact craters on our...Ch. 8 - Detail some of the anthropogenic changes to...Ch. 8 - If you wanted to live where the chances of a...Ch. 8 - Which type of object would likely cause more...Ch. 8 - If all life were destroyed on Earth by a large...Ch. 8 - Why is a decrease in Earth’s ozone harmful to...Ch. 8 - Why are we concerned about the increases in CO2...Ch. 8 - Do you think scientists should make plans to...Ch. 8 - Europe and North America are moving apart by about...Ch. 8 - Over the entire Earth, there are 60,000 km of...Ch. 8 - With the information from Exercise 8.25, you can...Ch. 8 - What is the volume of new oceanic basalt added to...Ch. 8 - Suppose a major impact that produces a mass...Ch. 8 - How do the risks of dying from the impact of an...Ch. 8 - What fraction of Earth’s volume is taken up by the...Ch. 8 - Approximately what percentage of Earth’s radius is...Ch. 8 - What is the drift rate of the Pacific plate over...Ch. 8 - What is the percent increase of atmospheric CO2 in...Ch. 8 - Estimate the mass of the object that formed Meteor...
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- Why is it more useful to classify meteorites according to whether they are primitive or differentiated rather than whether they are stones, irons, or stony-irons?arrow_forwardSuppose a new primitive meteorite is discovered (sometime after it falls in a field of soybeans) and analysis reveals that it contains a trace of amino acids, all of which show the same rotational symmetry (unlike the Murchison meteorite). What might you conclude from this finding?arrow_forwardThe 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.arrow_forward
- About how many exoplanets have been detected? Group of answer choices 2 dozen a few hundred a few thousand a few million more than a billionarrow_forwardWhich is not a type of asteroid A) Rocky B) Oxygen C) Metal D) Metal and Rock (mixed) E) All are types of asteroids 0) The solar system formed from A) A gas cloud B) Interplanetary asteroids C) Interaction between the Sun's magnetic field and dust D) Material brought in from other clouds E) None of the above.arrow_forward
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