Aim: How can we convert units? Do Now: Calculate the following with the correct number of significant figures: (2.53 x 106) (6 x 104) 5 x 10-2 Answer: 3 x 1012

Conversions Convert 5.2 cm to m Know your conversion factor 1 cm = 1/100 m or 1 m = 100 cm Hint: The larger number gets paired with the smaller unit 2. Write out your given and follow it with times and a fraction bar 5.2 cm x ______________________

3. Place your conversion factor into the fraction bar in such a way that you cancel out the original unit 5.2 cm x 1/100 m or 5.2 cm x 1 m 1 cm 100 cm 4. Solve 0.052 m

Multiple Step Conversions A method of converting from one prefix to another Convert 5.30 km to mm 5.3 km x 1000 m 1 km = 5.3 x 106 mm x 1000 mm 1 m

Problems Convert: 10.2 mm to m 342 g to kg 0.0102 m 5000 m to km 5.2 kg to g 10,500 cm to m 10 m to km 250 mL to L 2 km to cm 10 kg to μg 5 kg to mg 0.0102 m 0.342 kg 5 km 5,200 g 105 m 0.01 km 0.25 L 200,000 cm 10,000,000,000 μg 5,000,000 mg

Pages for Additional Reading Page 20 (again)