In this grassland ecosystem, where is the most chemical energy located?
A) decomposers
B) 1st trophic level
C) 2nd trophic level
D) 3rd trophic level
E) 4th trophic level
B
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During an earthquake, energy waves radiate outward in all directions through the interior from the ________ whereas energy waves radiate outward in all directions along the surface from the ________
A) epicenter; focus B) megathrust; fault C) hypocenter; focus D) focus; epicenter
Exposure to 1.0 roentgen of which of the following types of radiation causes the formation of the most ions?
A) a B) b C) g D) They all form the same number of ions.
What is the definition of a half-life?
A) The parent isotope half of a radiometric dating pair B) Half the time it takes for the parent isotope to decay to the daughter C) The time it takes for half of the parent isotope to decay to the daughter D) Half of the alpha particles necessary to decay at a steady rate
The speed of a shallow-water wave is proportional to ________
A) water depth B) wave frequency C) wave height D) wave period E) wavelength