Section 2-3 Worksheet

Part 1 – Write the number of significant figures in each of the following measurements.

A) 25.70 cm _____      B) 1070 mL _____      C)  0.0702 g    D)  610.000 s _____

E) 450 m _____           F)  0.00900 mm _____G) 256.12 K ____       H) 22.40 L _____

I)  0.3 km ____            J)  60.070 K _____     K)  0.0700 nm ____    L) 1.0070 kg ____

Part 2 – Perform the following calculations and report your answers with correct number of significant figures and units.

A)                                                 B)

C)                        D)

E)

Part 3-Round the following measurements to four significant digits.

A) 112345 mg  ___________ B) 12468 km ___________     C) 333.50 K _____________\

D) 100.05 s _____________   E) 10.940 kg ___________     F) 70.779 cm ____________

G) 12590 s ______________  H) 144.75 L ____________    I) 0.0067899 m ___________

Part 4- Write the following measurements in scientific notation.

A) 5280 mm ___________________  B) -0.22500 °C ____________________

C) 127 560 000 000 nm ________________________________________

D) 0.007270 pg _____________________________________________

E) 40.070 K _______________________________

Part 5- Expand the measurements written in scientific notation into measurements expressed not exponentially. Do not round!

A)

B)

C)

D)

E)