Measurements and Calculations PreTest

For the measurement 0.817 m, which digit is the estimated digit?

• a) 8

• b) 1

• c) 7

• d) There is no estimated digit in this measurement.

How many significant figures are there in the measurement 0.0120 g?

• two

• three

• four

• five

How many of the zeros in 0.00052010 are significant?

• one

• two

• six

• seven

Which of the following is the correct scientific notation for 0.0000007841 g?

• 7.841 x 10^7 g

• 7.841 x 10^8 g

• 78.41 x 10^-8 g

• 7.841 x 10^-7 g

Match the following distances with their equivalent in millimeters.

• 3.6 nm

• 3.6 x 10^-6 mm

• 3.6 km

• 3.6 x 10^6 mm

• 3.6 cm

• 36 mm

• 3.6 m

• 3.6 x 10^3 mm

The temperature of -25°C corresponds to a Kelvin temperature of (a)  

• 248 K
• 298 K
• 254 K
• -248 K

Express the measurement 20141 kg rounded to two significant figures.

• 2.0 x 10^4 kg

• 20,140 kg

• 20,100 kg

• 20 kg

What is the metric system prefix for the quantity 0.000000001?

• milli-

• centi-

• micro-

• nano-

If the temperature of a substance changes by 100 K, it changes by (a)   in °C.

• 0 °C
• 373 °C
• 273 °C
• 100°C

11.63 mL - 8.8 mL = ____________________

• 2.8 mL

• 2.83 mL

• 2.83

• 2.830 mL