1. Why should we convert units within the metric system? 2. The metric system is based on units of

a) twenty five b) fives c) sixteen d) tens

3. Work the “SI Estimation Challenge” in the box on page 13.

4. Copy the “study skills” figure on page 14.

5. Convert 52,000 kilometers to centimeters. 52,000 km = cm

6. Convert 25 millimeters meters. 25 mm = m

7. A conversion factor is a ratio with a value of

a) one b) two c) five d)ten