2. Conversions using Unit Rates

3. Joanne Smithies Our Lady & St. Gerards RCP

4. Are Units important? 3

5. "The 'root cause' of the loss of the spacecraft was the failed translation of English units into metric units in a segment of ground-based, navigation- related mission software, as NASA has previously announced," said Arthur Stephenson, chairman of the Mars Climate Orbiter Mission Failure Investigation Board. "The failure review board has identified other significant factors that allowed this error to be born, and then let it linger and propagate to the point where it resulted in a major error in our understanding of the spacecraft's path as it approached Mars." http://mars.jpl.nasa.gov/msp98/orbiter/ 4

6. Steps: 1. Identify starting & ending units. 2. Line up conversion factors so units cancel. 3. Multiply all top numbers & divide by each bottom number. 4. Check units & answer.

7. Use your unit rates to convert. 60 in = ______ ft 5 yd = ______ ft 30 ft = ______ yd

8. Use your unit rates to convert. 4 C = ______ oz 12qt= ______ gal 8pt= ______ C

9. Use your unit rates to convert. 6 lb= ______ oz 8,000 lbs= ______ T 144 oz= ______ lbs

10. Use your unit rates to convert. 50 mm = ______ cm 7,000 m= ______ km 300 cm= ______ m