Which of the following describes radioactive decay by beta particle emission?
A) The atomic number of the daughter isotope is one more than the parent; the mass numbers are the same.
B) The daughter isotope has an atomic number one less than the parent and a mass number two less.
C) The mass number of the daughter isotope is one more than the parent and both isotopes have the same atomic number.
D) The daughter isotope has an atomic number two less than the parent and a mass number four less.
Answer: A
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When the algae in coral reefs die off due to environmental stresses, the coral subsequently dies because of lack of food. This process is referred to as
a. coral acidification b. algal blooming c. erosion d. coral bleaching e. parasitism
A connected loop of deep and shallow ocean currents transports warm and cool water to various parts of the earth
Indicate whether the statement is true or false
Terracing of farmland
A. is a very new soil-conservation method. B. reduces surface-water runoff velocity and thus the efficiency of soil erosion and transport. C. is only used on very steep slopes. D. substantially reduces wind erosion by flattening field surfaces.
Mass wasting events are commonly triggered by natural events, such as heavy rains, but human activity can also play a factor. Which of the following human activities have been linked to mass wasting events?
A. Excessive irrigation B. Leaking septic systems C. Vibrations from local traffic D. Deforestation E. All are correct