<p>Astronomy Name______Chapter 1 Period______Worksheet Date______Math in Astronomy Part I</p><p>Directions: Write all of your answers in scientific notation (except were specified otherwise) with the correct number of significant digits. Include all units in your answers and show your work. </p><p>Units and Conversions (1 point each) 1. Convert the following: a. The distance to the moon => 384,000 km to miles</p><p> b. 3.45 miles to inches</p><p> c. 245 years to minutes</p><p> d. 45 mph to km/hr</p><p> e. The speed of light => 3.00 x 108 m/s to miles per hour</p><p>Scientific Notation and Significant Digits (1 point each) 2. Write 207,000 in scientific notation.</p><p>3. Write 4.56 x 107 in normal notation.</p><p>4. Convert the following distances to scientific notation.</p><p> a. Earth’s mass: 5,974,000,000,000,000,000,000,000 kg</p><p> b. The Sun’s mass: 1,989,999,000,000,000,000,000,000,000,000 kg</p><p> c. The Sun’s radius: 695,990 km</p><p> d. One year: 31,558,000 s</p><p>5. Write 7.530 x 10-5 in normal notation.</p><p>6. How many significant digits do the following numbers have? a. 0.00098900 b. 5400 c. 100.00300</p>