Which of the following is not a chemical change?
A. a rock being crushed to powder
B. grape juice turning into wine
C. grass growing
D. wood burning to ash
E. a loaf of bread growing mold
Answer: A
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The dew point:
A) has the same relationship to temperature as does relative humidity. B) can only be given in Kelvin degrees. C) is the same as the temperature when the relative humidity is 100 percent. D) is unrelated to the frost point.
The anti-clotting properties of aspirin are reduced by which of the following?
A) acetaminophen B) ibuprofen C) diclofenac D) all of these
Many developing countries have economies largely dependent on subsistence agriculture; the vast majority of the population in the Oceania / Pacific region, excluding Australia and New Zealand, live in rural areas
Indicate whether the statement is true or false
Which kind of steel has been specially treated to resist cutting by normal means?
a. case hardening b. alloy c. ductile d. tempered