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Questions and Answers
Which one of these is a scientific hypothesis?
Which one of these is a scientific hypothesis?
- A widely accepted theory
- A tentative explanation that can be tested (correct)
- A proven fact
- A belief based on personal opinion
What unit is equivalent to 1/1,000th of a gram?
What unit is equivalent to 1/1,000th of a gram?
- Kilogram
- Milligram (correct)
- Decigram
- Centigram
What is the area, to the correct number of significant figures, of a rectangle with a width of 2 cm and a length of 6.7 cm?
What is the area, to the correct number of significant figures, of a rectangle with a width of 2 cm and a length of 6.7 cm?
- 13.4 cm²
- 13 cm²
- 13.40 cm² (correct)
- 13.3 cm²
How would you prepare 500 mL of a 3 M NaCl solution?
How would you prepare 500 mL of a 3 M NaCl solution?
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What is a graduated cylinder used for?
What is a graduated cylinder used for?
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Which one of these is true about the temperature of a solution when a reaction in solution produces energy?
Which one of these is true about the temperature of a solution when a reaction in solution produces energy?
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What entropy changes occur when a substance melts?
What entropy changes occur when a substance melts?
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How are kinetic energy and potential energy different?
How are kinetic energy and potential energy different?
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What energy changes occur to a mass that starts from rest and slides without friction from the top to the bottom of an inclined plane?
What energy changes occur to a mass that starts from rest and slides without friction from the top to the bottom of an inclined plane?
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How are physical changes in a substance different from chemical changes?
How are physical changes in a substance different from chemical changes?
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