What does the following element description actually mean?
O
A. an oxygen atom with 6 protons and 12 neutrons
B. 18 oxygen molecules with 6 neutrons each
C. 6 oxygen atoms with 18 neutrons
D. an oxygen atom with 6 neutrons and 12 protons
E. none of the above
Answer: A
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Juliet Schor argues that Americans are trapped in a cycle of work-and-spend. Explain what she means by this, with examples.
What will be an ideal response?
Which of the following is densest: a kilogram of feathers, a kilogram of bricks, or a kilogram of water?
A) A kilogram of feathers B) A kilogram of water C) A kilogram of bricks D) All three have the same density because they all have the same mass.
Which of the following is true?
A) The Sun emits longwave radiation, whereas the Earth emits shortwave radiation. B) The Sun emits shortwave radiation, whereas the Earth emits longwave radiation. C) The radiation emitted by the Sun and the are roughly the same wavelength. D) Because the Sun is so far away, it is impossible to measure the wavelengths of its radiation.