How efficient are most conventional vehicles?
A. 35%
B. 25%
C. 50%
D. 75%

Bernie drove home from a vacation in 1.5 hours. he traveled a total distance of 60 miles. what was his average speed in miles per hour? a. 60 mph b. 90 mph c. 40 mph d. 55mph

What is the measure of how much matter is in an object and that can be measured using a balance? a. height b. volume c. weight d. mass

What do the atoms of elements in the same group have in common? a. they have the same atomic numbers. b. they have the same average atomic masses. c. they have the same number of electron shells. d. they have the same number of electrons in their outermost shells.