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Liquid plastic is frozen in a physical change that increases its volume. What can be known about the plastic after the
change?
Its mass will increase.
Its density will increase
Its mass will remain the same.
O Its density will remain the same.

How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by

Which changes of state do the labels represent? a: b: c:

The mantle is made up of which structural zones?