<p>Level 2 – Scientific Notation</p><p>1. </p><p>3. 4. </p><p>5. 6. </p><p>7. 8. </p><p>9. 10. </p><p>11. 12. Level 3 – Scientific Notation</p><p>1. Order from least to greatest:</p><p>, , , 2. In the year 2005, the population of the United States was about 296 million. Health expenditures were about $7,350 per person. In total, about how much did the U.S. spend on health care in 2005? Write an expression using scientific notation and solve. Write an expression using scientific notation and solve. Write your answer in scientific notation.</p><p>3. An ant has a mass of approximately and 4. An ant is cm long. If you put all the ants an elephant has a mass of approximately from your answer to #2 in line (from front 8,000 kilograms. How many ants would it to back), how long would the line be? take to equal the mass of an elephant? (Hint: 1kg = 1000 grams)</p><p>5. An ant weighs about pounds. There are 6. The average mass of an adult human is about ants on Earth. How many pounds of about 65 kilograms. The total human ants are on Earth? population in the world is approximately 6.84 billion people. What is the approximate mass of the entire population of the world? Write an expression using scientific notation and solve. </p><p>7. A penny is about thick. In 2011 there were approximately 5 billion pennies minted. a. If all of these pennies were placed in a single stack, how many centimeters high would the stack be? Write an expression using scientific notation and solve. Write your answer in scientific notation and standard form. b. If there are approximately 160,000 centimeters in a mile, how many miles high would the stack be? Write an expression using scientific notation and solve. Write your answer in scientific notation and standard form.</p>