21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 8, Problem 7QP
To determine
The reason for the Scientists know the history of Earth’s magnetic field from the given options.
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Students have asked these similar questions
1. Which of the following STILL significantly heats the Earth's interior?
a.
bombardment
b.
compression
c.
radioactivity
d.
differentiation
2. Both the Moon and Mercury have
a.
volcanic craters only
b.
impact craters only
c.
some volcanic and some impact craters
1) Describe the interior of the earth. Label and list all the layers. Explain how the earth’s megnatic field is formed. ( This is question from PH-111)
Some planets have very strong magnetic fields.
What features must a planet have to cause this?
a.both rapid rotation and a conducting liquid
core
b.only a rapid rotation
c.only a liquid conducting core
d.both a rapid rotation and a solid metallic core
e.only a metallic core
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
Ch. 8 - Prob. 4QPCh. 8 - Prob. 5QPCh. 8 - Prob. 6QPCh. 8 - Prob. 7QPCh. 8 - Prob. 8QPCh. 8 - Prob. 9QPCh. 8 - Prob. 10QPCh. 8 - Prob. 11QPCh. 8 - Prob. 12QPCh. 8 - Prob. 13QPCh. 8 - Prob. 14QPCh. 8 - Prob. 15QPCh. 8 - Prob. 16QPCh. 8 - Prob. 17QPCh. 8 - Prob. 18QPCh. 8 - Prob. 19QPCh. 8 - Prob. 20QPCh. 8 - Prob. 21QPCh. 8 - Prob. 22QPCh. 8 - Prob. 23QPCh. 8 - Prob. 24QPCh. 8 - Prob. 25QPCh. 8 - Prob. 26QPCh. 8 - Prob. 27QPCh. 8 - Prob. 28QPCh. 8 - Prob. 29QPCh. 8 - Prob. 30QPCh. 8 - Prob. 31QPCh. 8 - Prob. 32QPCh. 8 - Prob. 33QPCh. 8 - Prob. 34QPCh. 8 - Prob. 35QPCh. 8 - Prob. 36QPCh. 8 - Prob. 37QPCh. 8 - Prob. 38QPCh. 8 - Prob. 39QPCh. 8 - Prob. 40QPCh. 8 - Prob. 41QPCh. 8 - Prob. 42QPCh. 8 - Prob. 43QPCh. 8 - Prob. 44QPCh. 8 - Prob. 45QP
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- That the moon has no magnetic field implies that a. the moon is spinning too slowly to produce a magnetic field. b. the interior of the moon is too hot to produce a magnetic field. c. the crust of the moon is so thick that the magnetic field can not get out of the interior. d. the moon’s core contains little if any molten iron. e. the moon is moving further from Earth.arrow_forwardReview. The North American and European plates of the Earths crust are drifting apart with a relative speed of about 25 mm/yr. Take the speed as constant and find when the rift between them started to open, to reach a current width of 2.9 103 mi.arrow_forwardThe colorful display of lights in the upper atmosphere seen in higher and lower latitudes are called auroras. What causes them? a. the response of the earth’s magnetic field to solar flares b. solar radiation and particles ionize the gas molecules in that portion of the atmosphere c. the circulation of the earth’s outer core d. highly energetic particles coming from outer space glow as they enter our atmospherearrow_forward
- QUESTION 3 The surface of Venus receives a. a lot more sunlight than the surface of the Earth b. much less sunlight than the surface of the Earth c. about as much sunlight as the surface of the Earth QUESTION 4 Venus has very low surface wind speed because a. the greenhouse effect makes the surface temperature nearly uniform b. it has a very thin atmosphere c. the thick clouds don't allow for much convection in the atmosphere d. it doesn't have a large moonarrow_forwardThe condensation hypothesis for the formation of the moon suggests that the moon and Earth formed as a double planet from the same cloud within the solar nebula. It predicts a. that the moon and Earth should have nearly the same mass and radius. b. that the surfaces of the moon and Earth should be very similar and show evidence of plate tectonics. c. that the moon and Earth should have identical compositions and densities. d. all of the above. e. a and c.arrow_forward7. For a reflection seismic survey, where the subsurface has an average P-wave velocity of 1000m/s and we use a 10ms seismic wavelet, the best resolution we could obtain is? а. 1 m b. 2.5 m с. 5m d. 10 m 8. Seismic migration can be best described as a. Converting the seismic section from time to depth b. Adjusting the reflection time based on the hyperbolic travel time c. Stacking the traces d. Putting seismic reflectors in their correct location 9. In a seismic survey, an air wave can be best described as a. A wave that travels through the air b. A compression wave that travels through the air in the pore spaces in the rock. c. A direct, compression wave that travels from the source to the geophones through the air. d. All of the above 10. A seismic survey is conducted in a region with two layers. The top layer is shale, with density 2500 kg/m3, and seismic velocity of 2900m/s, and the bottom layer is sandstone, with a density of 2100 kg/m3, and a seismic velocity of 3000m/s. The…arrow_forward
- Due to tidal forces, a moon orbiting a planet will eventually a always keep the same side toward the planet b collide with the planet c break up into a number of fragments d develop a warmer climate as time goes on Jupiter's moon Io is very volcanically active, which means it has plate tectonics. a. true b. falsearrow_forwardScientists find evidence of a large meteor impact on the coast of the YucatánPeninsula in Mexico. What can the scientists most likely expect to find in the layers of rock that are about the same age as the impact?A. evidence of the mass extinction of many speciesB. evidence of a gradual change of one species over timeC. evidence of a rapid change in one speciesD. evidence of the stability of many species over timearrow_forwardDescribe the Law of magnetism.arrow_forward
- The origin of Earth's magnetism is due to moving charges in Earth's? A. liquid inner core B. liquid outer core C. solid inner core D. solid outer corearrow_forwardHydrothermal vent areas have hydrothermal chimneys, from which hot, mineral-rich water comes out. (This hot water often looks like black smoke, but it's not really smoke, it just has a lot of dark, microscopic mineral grains in it.) Where does this hot water come from? a Ice underneat the seafloor gets melted by volcanic activity, and this extra water comes out of the vents. b It comes directly from the Earth's core, since our core is made of hot, high-pressure water. c It is seawater that went down through cracks, got heated by magma, and rises up to emerge from the seafloor. d Some of the minerals in the Earth's mantle break down and release large volumes of water.arrow_forwardThe Hawaiian Islands have formed as the Pacific Plate moves northwestward over a hot spot of Earth’s interior that provides magma to form several volcanos. Explain what could happen if the Pacific Plate continues to move.arrow_forward
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