By definition, the porosity of rocks/sediments consists of pore spaces between particles/grains. Indicate whether the statement is true or false
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Your friend says that the helium used to inflate balloons is a product of radioactive decay. Another friend says "no way." With whom do you agree?
A. Helium is an element of the periodic table, not some product of any reaction. Agree with the friend who says "no way." B. Your first friend is correct. Radioactive isotopes emit alpha particles which, in turn, capture electrons and become helium atoms. C. If helium were a product of radioactive decay, we would all be radioactive. Agree with the friend who says "no way." D. Radioactive decay produces alpha particles, not helium. Agree with the friend who says "no way."
The disappearance of polar stratospheric clouds in the Antarctic spring contributes to the growth of the ozone hole over Antarctica
Indicate whether the statement is true or false
Why is erosion by wind more effective in an arid region than in a humid region?
What will be an ideal response?
Which of the following is one of the three current major drawbacks of solar energy?
A. Certain greenhouse gases are emitted with its use. B. It emits radiation. C. The resource is nonrenewable. D. This resource is intermittent in nature.