Mastering Comparisons and Divisions in Scientific Notation

A scientist measures the mass of a small particle as 3.2 x 10^-27 kg. If another particle has a mass of 8.0 x 10^-28 kg, how many times heavier is the first particle than the second?

• 4.0

• 1.5

• 2.5

• 6.0

A comet is traveling at a speed of 2.5 x 10^4 km/h. If another comet travels at 5.0 x 10^3 km/h, how many times faster is the first comet?

• 2.0

• 10.0

• 5.0

• 3.5

The distance from Earth to a distant star is approximately 4.5 x 10^16 meters. If a spaceship can travel 1.5 x 10^8 meters per hour, how many hours will it take to reach the star?

• 3 x 10^8 hours

• 5 x 10^8 hours

• 2 x 10^8 hours

• 1 x 10^9 hours

A bacteria culture grows to 1.2 x 10^6 cells after 2 hours. If it grows to 3.0 x 10^5 cells after 1 hour, how many times more cells are there after 2 hours compared to 1 hour?

• 6

• 5

• 4

• 3

A smartphone has a storage capacity of 1.5 x 10^9 bytes. If an app takes up 3.0 x 10^7 bytes, how many apps can be installed on the smartphone?

• 100

• 25

• 50

• 75

The height of Mount Everest is approximately 8.8 x 10^3 meters. If a hill is 2.2 x 10^3 meters tall, how many times taller is Mount Everest than the hill?

• 4

• 6

• 5

• 3

A car can travel 6.0 x 10^2 kilometers on a full tank of gas. If another car can travel 1.5 x 10^3 kilometers, how many times further can the second car travel on a full tank?

• 2.5

• 3.0

• 4.5

• 1.0

A small electronic component has a length of 2.5 x 10^-3 meters. If another component is 5.0 x 10^-4 meters long, how many times longer is the first component?

• 1.5

• 5.0

• 10.0

• 2.0

The population of a small town is 1.2 x 10^4 people. If another town has a population of 3.0 x 10^3 people, how many times larger is the population of the first town?

• 2.5

• 5.0

• 3.0

• 4.0

A satellite orbits Earth at an altitude of 3.6 x 10^7 meters. If another satellite orbits at 1.2 x 10^7 meters, how many times higher is the first satellite's orbit?

• 3

• 4

• 2

• 5