StraighterLine Exam 1 (Chpt. 1-3) With Complete
Solution 100% Verified
Which of the following is a tentative explanation for a set of observations?
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a. Law
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b. Hypothesis
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c. Theory
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d. Phenomena
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e. Prediction - Answer - b. Hypothesis
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Which of the following cannot be separated into simpler substances by chemical means?
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a. Element
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b. Emulsion
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c. Compound
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d. Homogeneous mixture
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e. Heterogeneous mixture - Answer - a. Element
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Which of the following is an extensive property?
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a. Density
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b. Temperature
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c. Mass
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d. Specific Heat
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e. Pressure - Answer - C. Mass
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Which of the following is a chemical change?
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, a. Boiling water
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b. Melting wax
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c. Broiling a steak on a grill
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d. Condensing water vapor into rainfall
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e. Carving a piece of wood - Answer - c. Broiling a stake on a grill
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Which one of these represents a physical change?
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a. Water, when heated, forms steam.
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b. Bleach turns hair yellow.
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c. Sugar, when heated, becomes brown.
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d. Milk turns sour.
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e. Apples, when exposed to air, turn brown. - Answer - a. Water, when heated, forms steam.
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How many significant figures does the sum 8.5201 + 1.93 contain? - Answer - 4
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The city of Los Angeles is now approximately 2400 miles south of Anchorage, Alaska. It is moving slowly
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northward as the San Andreas fault slides along. If Los Angeles is to arrive near Anchorage in 76 million
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years, at what average rate will it have to move in mm per month? (1 mi = 1609 m)
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a. 2.0 × 10-10 mm/mo.
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b. 6.6 × 10-6 mm/mo.
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c. 4.2 mm/mo.
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d. 9.5 mm/mo.
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e. 51 mm/mo. - Answer - c. 4.2 mm/mo.
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The SI prefix mega- (M) means
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a. 10^-6
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b. 10^-3
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c. 10^3
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d. 10^6
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e. 10^9 - Answer - d. 10^6
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