Which statement is true about the composition of minerals?
A) Minerals are composed of elements.
B) All minerals are compounds.
C) There are no minerals composed of only one element.
D) The chemical composition of a mineral does not determine the physical properties of the mineral.
Answer: A
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Consider a huge rotating cloud of particles in space that gravitate together to form an increasingly dense ball. As the cloud shrinks in size, it
A. rotates faster. B. rotates slower. C. rotates at the same rate.
Based on the principle of Baked Contacts, which of the following statements are right?
a. If an igneous intrusion "bakes" surrounding rocks, then the rock that has been baked must be younger than the intrusion b. The intrusion geologic feature is younger than the original rock c. Baked contacts do not provide directly the relative age, because of the later erosion d. When pluton (one igneous rock) was found to bake the adjacent rock, then this pluton is relatively younger e. Both b and d
The average annual precipitation for the earth is equal to the annual amount of evaporated water
Indicate whether the statement is true or false
Epinephrine
A) helps regulate blood glucose levels. B) is involved in the "fight or flight" response. C) helps regulate the amount of water in the body. D) acts in conjunction with glucagon to regulate calcium levels in the blood.