Astronomy Chp 5
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| What causes the Earth’s spherical shape? | earth's gravity
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| What causes the Earth’s equatorial bulge? | earth's rotation
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| The Earth’s radius is approximately 4 times larger than the Moon’s. Which of the following statements correctly compares the volume of the Earth to the volume of the Moon? | earth's volume is abot 64 times larger
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| Which following provides significant information about the composition of the Earth’s interior? | analysis of density and study of seismic waves
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| Which of the following is true about ozone? | consists of 3 atoms of oxygen, absorbs UV radiation, most abundant in thin atmospheric layer
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| Which of the following is the most abundant gas in the Earth’s atmosphere? | nitrogen
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| Which of the following demonstrates that the Earth spins around an axis? | coriolis effect
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| Can seismic waves travel through solids, liquids or both? | only solids
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| What is the origin of oxygen gas in the Earth’s atmosphere? | photosynthesis
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| What is the mechanism that produces the Earth’s magnetic field? | Earth's rotation and convection currents in the core
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| Which of the following result from the Coriolis effect? | tradewinds, gulf stream, jet streams, weather patterns
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| What causes precession? | gravitational interaction of the Sun and Moon
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| Which of the following are possible explanations for the high temperature of the Earth’s core? | decay of radioactive material & material accumulated to form the Earth
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| What is the origin of the Earth’s atmosphere? | gases released by volcanic eruptions & matter brought by comets
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| T/F It protects the Earth from energetic particles emitted by the Sun. | true
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| t/f It is due to the combined effect of the Earth’s rotation and convection currents in the molten core. | true
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| t/f The interaction of the magnetic field charged particles from the Sun creates the aurora. | true
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| The average density of the Earth is about 5.5 g/cm3 yet most of the rocks on the Earth’s surface are about 3 g/cm3. What could we conclude from this comparison? | The Earth’s interior must have material with density higher than 5.5 g/cm3.
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| The Earth’s equatorial diameter is slightly larger than the diameter through the poles. The difference in diameters causes gravity to be ______________ at the poles | stronger
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| ______ is the most abundant element in the Earth’s crust. | oxygen
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| type of seismic waves that can travel through liquids and solids | P
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| type of seismic waves that can only travel through solids | S
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| The average density of the Earth is ____. | 5.5 grams per centimeter cubed
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| Scientists refer to the Earth as a differentiated planet because ______. | because the material in the interior of the Earth are separated by density
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| The ______ are two doughnut-shaped rings of charged particles trapped by the Earth’s magnetic field | Van Allen radiation belts
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| The probable cause of Van Allen radiation belts is ___________. | the Earth’s magnetic field
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| The probable cause of Precession is ___________. | equatorial bulge
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| The probable cause of high pressure in the core is ___________. | the Earth’s gravity
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| The probable cause of spherical shape is ___________. | the Earth’s gravity
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| Where on Earth would silicates most likely be found? | crust
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| Where on Earth would an aurora most likely be found? | Around magnetic poles
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| Where on Earth would volcanoes most likely be found? | crust
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| Where on Earth would the largest radius most likely be found? | equator
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| Where on Earth would lower surface gravity most likely be found? | equator
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| Which property goes with the Ozone? | absorbs UV light
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| Which property goes with ammonia and methane in the atmosphere? | absorbs UV light
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| Where is liquid water abundant | in the crust
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| Where is radioactive heating abundant? | in the core
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| Which of the following methods is used to determine age of the Earth? | Radioactive decay
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| Which of the following is caused by Earth’s rotation? | Coriolis effect
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| Which of the following causes precession of the Earth’s axis? | equatorial bulge
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| Which of the following causes the trade winds? | Coriolis effect
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| Which of the following may be a source of heat in the Earth’s interior? | radioactive decay
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