SI Units and conversions

What is the symbol for the prefix kilo-?

• L

• m

• k

• kg

When converting between SI prefixes, what should you do if you are moving from smaller to larger units?

• move the decimal to the left

• move the decimal to the right

• do not move the decimal

• use dimensional analysis

Convert from meters to cm:  9 meters

• 900 cm
• 90 cm
• 0.9 cm
• 0.09 cm

Convert 17 m to cm:

• 0.17 cm
• 0.017 cm
• 1,700 cm
• 170 cm

Convert 300 meters to centimeters:

• 3000 cm
• 0.3 cm
• 30,000 cm
• 3 cn

240 cm = ___________ m

• 2400
• 24
• 2.4
• 0.24

15.6 L = ___________ mL

• 15,600
• 156,000
• 1,560,000
• 15,600,000

2804 mg = ___________ g

• 0.2804
• 2.804
• 28.04
• 280.4

490,000 g =____ kg

• 490
• 49
• 4,900
• 0.49

How many significant figures (sig figs) are in the value 1204?

(a)  

Answer explanation

Nonzeros and zeros between nonzeros are ALWAYS significant.