21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 9, Problem 11QP
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Choose the correct option regarding the given statement.
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1.) Gases in the atmosphere keep the temperature in a range to support life on earth.
2.) There is an exact place where the atmosphere ends.
1.) A convection current is caused by differences in temperature resulting to variation in?a. air pressureb.colorc.densityd.mass2.) Scientists believe that the motion of tectonic plates is caused bya. pressure in earth's crustb.conveyor beltsc.convection currentsd.heat in the earth's core3.) It is a measure of how much mass there is in a volume of a subtance.a. volumeb. temperaturec. densityd. mass4.) Hot molten materials in a convection cell rises near thea. outer coreb. crustc. inner cored. mantle5.) The idea that earth's lithosphere is broken up into seperate plates that float on the mantle is the theory ofa. continental driftb. seafloor spreadingc. tectonic movementd. plate tectonics6.) The region in which one plate moves under another isa. rift valleyb. subduction zonec. magma chamberd. vent7.) The motion of gas or liquid caused by differences in temperature is aa. tectonic movementb. plate tectonicc. convection currentd. magma chamber8.) A driving force for plate motion at…
The 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.
Chapter 9 Solutions
21st Century Astronomy
Ch. 9.1 - Prob. 9.1CYUCh. 9.2 - Prob. 9.2CYUCh. 9.3 - Prob. 9.3ACYUCh. 9.3 - Prob. 9.3BCYUCh. 9.4 - Prob. 9.4CYUCh. 9.5 - Prob. 9.5CYUCh. 9 - Prob. 1QPCh. 9 - Prob. 2QPCh. 9 - Prob. 3QPCh. 9 - Prob. 4QP
Ch. 9 - Prob. 5QPCh. 9 - Prob. 6QPCh. 9 - Prob. 7QPCh. 9 - Prob. 8QPCh. 9 - Prob. 9QPCh. 9 - Prob. 10QPCh. 9 - Prob. 11QPCh. 9 - Prob. 12QPCh. 9 - Prob. 13QPCh. 9 - Prob. 14QPCh. 9 - Prob. 15QPCh. 9 - Prob. 16QPCh. 9 - Prob. 17QPCh. 9 - Prob. 18QPCh. 9 - Prob. 19QPCh. 9 - Prob. 20QPCh. 9 - Prob. 21QPCh. 9 - Prob. 22QPCh. 9 - Prob. 23QPCh. 9 - Prob. 24QPCh. 9 - Prob. 25QPCh. 9 - Prob. 26QPCh. 9 - Prob. 27QPCh. 9 - Prob. 28QPCh. 9 - Prob. 29QPCh. 9 - Prob. 30QPCh. 9 - Prob. 31QPCh. 9 - Prob. 32QPCh. 9 - Prob. 33QPCh. 9 - Prob. 34QPCh. 9 - Prob. 35QPCh. 9 - Prob. 36QPCh. 9 - Prob. 37QPCh. 9 - Prob. 38QPCh. 9 - Prob. 39QPCh. 9 - Prob. 40QPCh. 9 - Prob. 41QPCh. 9 - Prob. 42QPCh. 9 - Prob. 43QPCh. 9 - Prob. 44QPCh. 9 - Prob. 45QP
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- Review. 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_forwardWhat evidence can you give that granulation is caused by convection?arrow_forwardHow Do We Know? Why is heat flow the key to understanding a planet’s surface activity?arrow_forward
- Why do astronomers conclude that the crust on Mars must be thicker than Eths crust?arrow_forwardAssume P waves travel at 10 km/s and S waves travel at 5 km/s. If the S waves from an earthquake arrive at a seismographic station 10 minutes after the P waves, how far away was the earthquake from the station’arrow_forwardHow do you know that Earth differentiated?arrow_forward
- 5 What is the delta T ?arrow_forwardEarthquakes produce several types of shock waves. The most well-known are the P-waves (P for primary or pressure) and the S-waves (S for secondary or shear). In the earth's crust, the P-waves travel at around 6.5 km/skm/s while the S-waves move at about 3.5 km/skm/s. The actual speeds vary depending on the type of material they are going through. The time delay between the arrival of these two waves at a seismic recording station tells geologists how far away the earthquake occurred. If the time delay is 33 ss, how far from the seismic station did the earthquake occur? Express your answer in kilometers d = __________kmarrow_forwardThe planet Venus is different from the earth in several respects. First, it is only 70% as far from the sun. Second, its thick clouds reflect 77% of all incident sunlight. Finally, its atmosphere is much more opaque to infrared light. Calculate the solar constant at the location of Venus, and estimate what the average surface temperature of Venus would be if it had no atmosphere and did not reflect any sunlight.arrow_forward
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