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- 1. Multiple ChoiceWhat is the cycle of heated material rising and cooler material sinking?convection currentasthenospherecontinental driftseafloor spreading
- 2. Multiple ChoiceWhat is the part of Earth that combines the upper mantle and the crust?asthenospherelithosphereplatePangaea
- 3. Multiple ChoiceWhat is the part of Earth that is made up of the lower mantle?lithosphereseafloor spreadingasthenosphereHess
- 4. Multiple ChoiceWhat happens when large land masses move towards or away from each other?convection currentseafloor spreadingplate tectonicscontinental drift
- 5. Multiple ChoiceWho came up with the seafloor spreading theory?HessMr. BergesonWegenerGeorge Washington
- 6. Multiple ChoiceWhat was the large landmass when all of the continents were together?asthenospherePangaeaplateWegener
- 7. Multiple ChoiceWhat is a section of Earth that is free to move around?plate tectonicsPangaeaplatelithosphere
- 8. Multiple ChoiceWhat is the theory that combines continental drift and seafloor spreading?PangaeaHessconvection currentplate tectonics
- 9. Multiple ChoiceWhat happens when the bottom of the ocean spreads out?seafloor spreadingplate tectonicsconvection currentcontinental drift
- 10. Multiple ChoiceWho came up with the continental drift theory?LeeWegenerHessBetty Ross
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