StraighterLine Exam 1 (Chapters 1–3) Complete
Study Guide, Practice Questions & Verified Exam
Prep 2026–2027
Which of the following is a tentative explanation for a set of observations?
a. Law
b. Hypothesis
c. Theory
d. Phenomena
e. Prediction - correct answers -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 answers -a. Element
Which of the following is an extensive property?
a. Density
b. Temperature
c. Mass
d. Specific Heat
1
, e. Pressure - correct answers -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 answers -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.
c. Sugar, when heated, becomes brown.
d. Milk turns sour.
e. Apples, when exposed to air, turn brown. - correct answers -a. Water, when heated, forms steam.
How many significant figures does the sum 8.5201 + 1.93 contain? - correct answers -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.
2
Study Guide, Practice Questions & Verified Exam
Prep 2026–2027
Which of the following is a tentative explanation for a set of observations?
a. Law
b. Hypothesis
c. Theory
d. Phenomena
e. Prediction - correct answers -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 answers -a. Element
Which of the following is an extensive property?
a. Density
b. Temperature
c. Mass
d. Specific Heat
1
, e. Pressure - correct answers -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 answers -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.
c. Sugar, when heated, becomes brown.
d. Milk turns sour.
e. Apples, when exposed to air, turn brown. - correct answers -a. Water, when heated, forms steam.
How many significant figures does the sum 8.5201 + 1.93 contain? - correct answers -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.
2
