Chapter 1: measurements Flashcards
1
Q
298,000 kilograms, can also be written as
A
2.98 × 10^5 kg
2
Q
0.0000025 kilograms, can be written as
A
2.5 × 10^−6 kg
3
Q
Volume is :
A
the measure of the amount of space occupied by an object.
4
Q
Density:
A
ratio of the mass of a sample of the substance to its volume. density=mass/volume
5
Q
exact number:
A
Counting is the only type of measurement that is free from uncertainty (eggs in a carton, centimeters in an inch)
6
Q
Measurements are said to be precise when:
A
they yield very similar results when repeated in the same manner. (hitting a target in the same place multiple times-but, not the bullseye)
7
Q
A measurement is considered accurate if it
A
yields a result that is very close to the true or accepted value (hitting the bullseye)
