Questions:
Significant Figures
1. Provide the type of measurement (volume, length, temperature etc.) for the following units:
i) 298 K
ii) 65 mL
iii) 15 m
iv) 290 kg
v) 50 g
2. Write the following measurements in scientific notation:
i) 150000000 kg
ii) 0.28 L
iii) 0.00004 m
3. Answer whether the numbers in each of the following statements is measured or exact:
i) The Cambrian explosion occurred 545000000 years ago.
ii) 26 students went for the field trip.
iii) The number of microbes on a telephone is 25600.
4. State how many significant figures there are in each of the following measured quantities:
i) 18.000 m
ii) 52.80 L
iii) 7.0 X 10-14 kg
5. Round off each of the following numbers to two significant figures:
i) 66.666
ii) 0.0063424
iii) 9577