What type of magma is typically generated along mid-ocean ridges (divergent plate boundaries)?
a) mafic
b) silicic
c) intermediate
d) both silicic and intermediate
e) depends on the location of the mid-ocean ridge
Answer: a) mafic
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Given that the total number of atoms on our planet remains fairly constant, how is it ever possible to deplete a natural resource such as a metal?
A. The atoms don't leave our planet, which is why naturally occurring materials never really reach the point of depletion. B. The problem is with the expense of collecting metal atoms that are uniformly dispersed. C. The problem remains that not everyone recycles as they should. D. Recycling only forestalls the inevitable depletion of metal resources.
What is the tenacity of a mineral, and how can it be described?
Tenacity is the ability of a mineral's crystal to stay attached to other crystals. It can be described as tenacious, very tenacious, or not tenacious. Tenacity is the mineral's resistance to breaking, bending, or otherwise deforming. A mineral's tenacity can be described as brittle, elastic, malleable, or sectile. Tenacity is the mineral's resistance to breaking, bending, or otherwise deforming, although the deformation always reverts to the original shape of the mineral. A mineral's tenacity can be described as tenacious, very tenacious, or not tenacious. Tenacity is the mineral's resistance to breaking, bending, or otherwise deforming. A mineral's tenacity can be described as tenacious, very tenacious, or not tenacious. Tenacity describes how easily a mineral can be broken and is described as brittle, elastic, malleable, or sectile.
Marble, quartzite, greenstone, hornfels, and anthracite are examples of ____________________ metamorphic rocks
Fill in the blank(s) with correct word
The principal source of water in the oceans and the atmosphere is by the process of _________.
a. halocline
b. thermocline
c. outgassing
d. turbidity