A flask of water rests on a scale. If you dip your finger into the water, without touching the flask, the reading on the scale will
A) decrease.
B) stay the same.
C) increase.
D) behave unpredictably.
C
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What is the thermosphere?
A) the lowest layer in the atmosphere B) the part of the atmosphere that absorbs optical light C) the part of the atmosphere that absorbs ultraviolet D) the part of the atmosphere that absorbs X-rays E) the highest layer in the atmosphere
The word science comes from the Latin word meaning
a. "experiment." b. "investigate." c. "knowledge." d. "debate."
The magnetic field of the Earth is believed responsible for which of the following?
a. deflection of charged cosmic rays b. ozone in the upper atmosphere c. solar flares d. deflection of both charged and uncharged cosmic rays
The expression(s) indicating the number of protons in a nucleus is
a. A b. N c. Z d. Z + N e. A – Z