If carbon-14 is a beta emitter, what is the likely product of radioactive decay?
A) nitrogen-14
B) carbon-12
C) oxygen-18
D) beryllium-10
E) none of the above
A
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What term describes islands that were once connected to a continent?
A)vestigial B)oceanic C)continental D)biogeographical E)volcanic
The most likely chemical evolutionary sequence for groundwater in a sedimentary basin would be:
a. sulfate, bicarbonate, chloride b. chloride, sulfate, bicarbonate c. bicarbonate, sulfate, chloride d. bicarbonate, chloride, sulfate
How does discarded plastic end up in marine ecosystems?Why are microplastics the greatest concern?
What will be an ideal response?
The oldest known terrestrial material (a zircon included in a younger rock) dates back to 4.4 billion years ago. Where is this material located?
A) Dharwar Craton, India B) Slave Craton, Alberta, Canada C) Jack Hills, Western Australia D) Grenville Terrance, United States