Units and Significant Figures Flashcards
What is the base unit of length in the metric system?
meter (m)
How many centimeters are in one meter?
100 cm
How many millimeters are in one meter?
1000 mm
What is the relationship between millimeters and centimeters?
10 mm = 1 cm
How many kilometers are in one meter?
0.001 km
What is the base unit of mass in the metric system?
gram (g)
How many grams are in one kilogram?
1000 g
How many milligrams are in one gram?
1000 mg
How many liters are in one cubic meter?
1000 L
What is the formula to calculate the volume of a regular object?
length x width x height
What is the formula for density?
density = mass / volume
What units are commonly used to express density?
- g/mL
- g/cm³
- g/cc
What is the mnemonic to remember metric prefixes?
Most Kings Hate Dragons Because Dragons Cook Many Marshmallows Nightly
What does significant figures refer to in scientific measurements?
Digits that are certain except the last, which is an estimation
Are all non-zero numbers considered significant figures?
Yes
In the number 1.0082, how many significant figures are there?
5 significant figures
What are placeholder zeros?
Zeros that are not significant
In the measurement 0.000000931, how many significant figures are present?
3 significant figures
How do you determine significant figures in multiplication and division?
The answer has the same number of significant figures as the number with the least significant figures
How do you determine significant figures in addition and subtraction?
The answer has the same number of decimal places as the number with the least decimal places
What is accuracy in measurements?
Agreement of a measurement with a true value
What is precision in measurements?
Agreement among repeated measurements of the same quantity
What is the volume of an object that measures 2.8 cm x 3.2 cm x 2.5 cm?
22.4 cm³
Fill in the blank: 1 liter = _______ milliliters.
1000 mL
Fill in the blank: 1 kilogram = _______ grams.
1000 g
True or False: In numbers with no decimal point, zeros at the end are significant.
False
How many significant figures does the number 2020 have?
Depends on context; could be 2, 3, or 4
What happens to significant figures in mixed operations?
Determined in the same order as mathematical operations
What is the density of a substance with a mass of 56.8 g occupying a volume of 23.4 mL?
Density = mass/volume = 56.8 g / 23.4 mL
How many significant figures does the number 1000 have?
1 significant figure (without decimal point)
In scientific notation, how are significant figures defined?
All digits in the coefficient are significant
