Which of the following affects the half-life of a radioactive sample?
A) the age of sample
B) the size of the sample
C) the temperature of the sample
D) none of these
D
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Which of the following is true about how contamination moves in groundwater?
A) Contamination moves up the slope of groundwater. B) Contamination moves opposite to the direction of groundwater flow. C) Contamination introduced into the ground does not move. D) Contamination spreads out as it moves, forming a widening plume.
Transferability is a spatial interaction concept related to the costs of overcoming the distance between two places.
Indicate whether the statement is true or false.
What is a general rule to help determine how fast a given fish can swim?
a) the bigger the fish, the faster it can probably swim b) the smaller the fish, the faster it can probably swim c) the thinner the fish, the faster it can probably swim d) the more poisonous the fish, the faster it can probably swim e) fish that live in the epipelagic zone usually swim faster than those whose natural habitat is the abyssalpelagic zone
The Enhanced Fujita scale classifies tornadoes according to the ____ of the tornado
a. wind direction b. rotational wind speed c. vertical wind speed d. diameter and height e. length of the path of damage