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