1. Quiz Review 8th Grade

2. How many times bigger is the distance from Earth to the sun of 9
How many times bigger is the distance from Earth to the sun of 9.3 x 102 miles than the furthest distance
from Earth to the moon of 3 x 104 miles?

3. The temperature halfway to the Sun from Mercury is approximately 1,8000 and scientists theorize that it
may be up to 26,000 times hotter at the center of the Sun. Approximately how hot is it at the center of the Sun?

4. Each shrimp weighs approximately 0
Each shrimp weighs approximately and a shrimp company can bring in over 3,100,000,000
shrimp per year. Approximately how much would that many shrimp weigh?

5. The Earth has a mass of about 1. 5 109 kg. Neptune has a mass of 1
The Earth has a mass of about kg. Neptune has a mass of 1.8 x 1012 kg. How many times bigger is
Neptune than Earth?

6. A country has an area of approximately 8,400,000,000 square miles and has approximately 210,000 people.
How much area is this per person?

7. A blue whale can eat 300,000,000 krill in a day
A blue whale can eat 300,000,000 krill in a day. All of that krill weighs approximately 6,300,000,000 9.
About how much does each krill weigh?

8. The US spends on average 10,200 dollars on each student per year
The US spends on average 10,200 dollars on each student per year. There are about 77,000,000 students in
the United States. How about much money total is spent on students each year?

9. McDonald’s has about 210,000 managers and each makes on average 39,000 dollars per year. How much
money does McDonald’s spend on managers each year?

10. The body of a 150 lb person contains 2. 3 x 10-4 lb of copper
The body of a 150 lb person contains 2.3 x 10-4 lb of copper. How much copper is contained in the bodies of 1200 such people?

11. The speed of light is approximately 3 x 108 m/s
The speed of light is approximately 3 x 108 m/s. How far does light travel in 6.0 x 101 seconds?

12. A computer can perform 4. 66 x 108 calculations per second
A computer can perform 4.66 x 108 calculations per second. How many calculations can this computer perform in one minute?

13. The size of the Indian Ocean is 2. 7 x 107 square miles
The size of the Indian Ocean is 2.7 x 107 square miles. The Arctic Ocean is 1/5 the size of the Indian Ocean. How big is the Arctic Ocean?

14. The speed of light is 3 x 10 8 m/s. If the sun is 1
The speed of light is 3 x 10 8 m/s. If the sun is 1.5x 1011 meters from earth, how many seconds does it take light to reach the earth?

15. A liter is equal to 1 x 106 mm3. There are roughly 5 x 106 red blood cells in 1 mm3 of human blood. How many red blood cells are there in a liter of human blood?

16. Lake Superior has roughly 25 times the volume of Lake Erie
Lake Superior has roughly 25 times the volume of Lake Erie. If the volume of Lake Superior is approximately 1.22 x 104 km3, what is the approximate volume of Lake Erie?