Air pollution levels that may be life-threatening within a few hours or days are termed:
A) high risk B) fast acting C) toxic D) acute
D
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According to the equilibrium rule, the vector sum of all forces acting on a
A. non-accelerating body is zero. B. body at rest is zero. C. body in uniform motion is zero. D. all of the above
What is an ice quake?
a. The force of that creates a wave b. Ice that is smashed and ground together to form pressure ridges c. The force that determines a wave's size d. An ice shear zone where waves collide
A seamount is a: a. small, extinct volcano that peeks above the sediment
b. volcano that rises above the sea surface. c. volcano that is flat on top, showing that it once was above sea level. d. large active or inactive volcano that is entirely below the sea surface.
The introduction of which of the following non-native species has done has done extensive damage to the Black Seas's fishing and tourist industries?
A) Atlantic comb jelly Mnemiopsis leidyi B) Seaweed Caulerpa taxifolia C) European green crab Carcinus maenas D) Atlantic cordgrass Spartina alterniflora E) European zebra mussel Dreissena polymorpha