The average time that an atom of a given element, or a molecule of a given substance, remains in a compartment before it is removed in some way is referred to as the
A) residence time
B) half-life
C) LD-50
D) decay time
Correct Answer:
Verified
Q6: Modern farmers usually use nitrogen fertilizers which
Q7: Nitrogen fixation is the process that converts
A)atmospheric
Q8: Photosynthesis is the process by which
A) carbohydrates
Q9: Respiration is the
A)breakdown of water and carbon
Q10: Select the true statement.
A)Nitrogen gas and oxygen
Q12: The compartments of our planet are
A)hydrosphere, lithosphere,
Q13: The geosphere of our planet is composed
Q14: The only significant way oxygen (O2) enters
Q15: The phosphorus cycle differs from the others
Q16: Which cycle requires photosynthesis?
A)carbon cycle
B)nitrogen cycle
C)sulfur cycle
D)phosphorus
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