# Focus On Physical Science: California Grade 8

## Chapter 11: Our Solar System

### Math Practice

 1. If the eccentricity of Neptune’s orbit is 0.0086, and half of the major axis, a is 450 x 1010 m, find the approximate distance to the focus point where the sun could be located in the orbit, c. Need a Hint? A) 3.87 x 10exp9 m B) 3.87 x 10exp8 m C) 5.23 x 10exp14 m D) 3.87 x 1010 m 2. If the eccentricity of Mercury’s orbit is 0.206, and half of the major axis, a is 0.387 AU, find the approximate distance to the focus point where the sun could be located in the orbit, c. Need a Hint? A) 0.593 AU B) 1.88 AU C) 0.532 AU D) 0.0797 AU 3. If the eccentricity of Venus’ orbit is 0.007, and half of the major axis, a is 0.723 AU, find the approximate distance to the focus point where the sun could be located in the orbit, c. Need a Hint? A) 0.0097 AU B) 103.3 AU C) 0.00506 AU D) 0.73 AU 4. If the eccentricity of Earth’s orbit is 0.017, and half of the major axis, a is 1.000 AU, find the approximate distance to the focus point where the sun could be located in the orbit, c. Need a Hint? A) 1.017 AU B) 58.8 AU C) 0.017 AU D) 0.983 AU 5. If the eccentricity of Mars’ orbit is 0.093, and half of the major axis, a is 1.881 AU, find the approximate distance to the focus point where the sun could be located in the orbit, c. Need a Hint? A) 20.2 AU B) 0.175 AU C) 0.049 AU D) 1.788 AU 6. If the eccentricity of Jupiter’s orbit is 0.048, and half of the major axis, a is 11.857 AU, find the approximate distance to the focus point where the sun could be located in the orbit, c. Need a Hint? A) 247.02 AU B) 0.569 AU C) 0.004 AU D) 11.809 AU 7. If the eccentricity of Saturn’s orbit is 0.056, and half of the major axis, a is 29.42 AU, find the approximate distance to the focus point where the sun could be located in the orbit, c. Need a Hint? A) 1.648 AU B) 525.4 AU C) 0.0019 AU D) 29.364 AU 8. If the eccentricity of Uranus’ orbit is 0.046, and half of the major axis, a is 83.75 AU, find the approximate distance to the focus point where the sun could be located in the orbit, c. Need a Hint? A) 3.853 AU B) 1820.7 AU C) 0.00055 AU D) 83.70AU 9. If the eccentricity of Neptune’s orbit is 0.009, and half of the major axis, a is 163.72 AU, find the approximate distance to the focus point where the sun could be located in the orbit, c. Need a Hint? A) 18191 AU B) 1.473 AU C) 0.000055 AU D) 152 AU 10. If the eccentricity of Pluto’s orbit is 0.249, and half of the major axis, a is 248.0 AU, find the approximate distance to the focus point where the sun could be located in the orbit, c. Need a Hint? A) 996 AU B) 61.752 AU C) 0.001 AU D) 247.751 AU