Unit 2 Sec1-3

How many significant figures are in this number: 0.005

• 1

• 2

• 3

• 4

Answer explanation

zeros before a non-zero are insignificant

How many significant figures are in this number: 5.00

• 1

• 2

• 3

• 4

Answer explanation

zeros after a decimal are significant

What range of percent error is considered accurate in the lab?

• Greater than 10%

• Less than 10%

• Greater than 50%

• Less than 1%

Accuracy is best defined as

• How close values are to EACH OTHER

• How close values are to THE ACCEPTED VALUE

Precision is best defined as

• How close values are to EACH OTHER

• How close values are to THE ACCEPTED VALUE

How many significant figures in this value: 5,000,000

• 1

• 7

• 6

• 3

Answer explanation

zeros after a non-zero number WITHOUT a decimal are insignificant

How many significant figures in this value: 5,005

• 2

• 1

• 4

• 3

Answer explanation

zeros between non-zero numbers are significant

Convert this number to scientific notation (rounding to hundredths place): 6,032

• 6.032 x 10³

• 6 x 10³

• 6.03 x 10^-3

• 6.03 x 10³

Answer explanation

exponent is positive because we start with a large number and move to the left.

Convert this number to scientific notation (rounding to hundredths place): 45,670

• 4.57 x 10⁴

• 4.56 x 10⁴

• 4.57 x 10^-4

• 4.56 x 10^-4

Answer explanation

exponent is positive because we start with a large number and move to the left. Check for rounding.

Convert this number to scientific notation (rounding to hundredths place): 60,050,120

• 6.01 x 10⁷

• 6.01 x 10^-7

• 6.00 x 10⁷

• 6.00 x 10^-7

Answer explanation

exponent is positive because we start with a large number and move to the left. Check for rounding.