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53. One varve equals one coarse summer layer and one fine winter layer. A. True B. False
One varve equals one coarse summer layer and one fine winter layer. TRUE.
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Asked 4/7/2013 6:06:06 PM
Updated 179 days ago|1/20/2018 4:00:18 PM
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One varve equals one coarse summer layer and one fine winter layer. TRUE.
Added 179 days ago|1/20/2018 4:00:18 PM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [1/21/2018 8:24:47 AM]
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12. Ancient rock cores around which the continents are formed are known as ________. A. supercontinents B. shields C. cratons D. tectonic plates
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Updated 4/12/2015 2:25:18 PM
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Ancient rock cores around which the continents are formed are known as CRATONS.

Added 4/12/2015 2:25:18 PM
This answer has been confirmed as correct and helpful.
48. Movement of tectonic plates can lead to alternations of climates and species. A. True B. False
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Updated 8/29/2014 1:22:18 AM
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Movement of tectonic plates can lead to alternations of climates and species is true.
Added 8/29/2014 1:22:18 AM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [8/29/2014 1:26:34 AM], Rated good by jeifunk
46. Index fossils allow us to age rock layers. A. True B. False
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Updated 264 days ago|10/27/2017 12:38:22 PM
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Index fossils allow us to age rock layers. TRUE.

Added 264 days ago|10/27/2017 12:38:22 PM
This answer has been confirmed as correct and helpful.
43. Convection is the movement of materials due to differences in their density. A. True B. False
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Updated 11/18/2015 4:56:41 AM
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Convection is the movement of materials due to differences in their density. TRUE.
Added 11/18/2015 4:56:41 AM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [11/18/2015 4:57:03 AM], Rated good by jeifunk
55. Radioactive elements are used to determine absolute age. A. True B. False
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Updated 3/10/2016 10:37:11 PM
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Radioactive elements are used to determine absolute age. TRUE.
Added 3/10/2016 10:37:11 PM
This answer has been confirmed as correct and helpful.
Confirmed by Andrew. [3/10/2016 11:30:30 PM]
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