7th Grade Scientific Notation: Adding & Converting Values

A scientist measures the mass of a small particle as 3.5 x 10^-27 kg. Convert this mass to scientific notation if it is increased by 2.1 x 10^-27 kg. What is the new mass in scientific notation?

• 5.6 x 10^-27 kg

• 3.0 x 10^-27 kg

• 4.5 x 10^-27 kg

• 6.1 x 10^-27 kg

The distance from Earth to a nearby star is approximately 4.2 x 10^16 meters. If another star is 3.8 x 10^16 meters away, what is the total distance to both stars in scientific notation?

• 4.0 x 10^16 meters

• 7.5 x 10^16 meters

• 8.0 x 10^16 meters

• 9.0 x 10^16 meters

A virus can replicate itself 1.5 x 10^6 times in one hour. If it replicates for 2 hours, how many times will it replicate in scientific notation?

• 3.0 x 10^7

• 3.0 x 10^6

• 1.5 x 10^6

• 6.0 x 10^6

A cell has a volume of 2.5 x 10^-9 liters. If you have 4 cells, what is the total volume of the cells in scientific notation?

• 1.0 x 10^-8 liters

• 1.0 x 10^-7 liters

• 2.5 x 10^-9 liters

• 5.0 x 10^-9 liters

The speed of light is about 3.0 x 10^8 meters per second. If a spaceship travels for 5 seconds, how far does it travel in scientific notation?

• 2.5 x 10^9 meters

• 1.0 x 10^8 meters

• 1.5 x 10^9 meters

• 4.0 x 10^9 meters

A small comet has a mass of 1.2 x 10^12 kg. If it gains an additional mass of 3.4 x 10^11 kg, what is the total mass of the comet in scientific notation?

• 1.2 x 10^12 kg

• 2.0 x 10^12 kg

• 1.54 x 10^12 kg

• 1.8 x 10^12 kg

The population of a small town is 2.5 x 10^4 people. If the population increases by 1.5 x 10^4 people, what is the new population in scientific notation?

• 3.5 x 10^4

• 2.0 x 10^4

• 4.0 x 10^4

• 5.0 x 10^4

A water reservoir holds 1.8 x 10^6 liters of water. If it receives an additional 2.2 x 10^6 liters from rainfall, what is the total volume of water in scientific notation?

• 4.0 x 10^6 liters

• 2.0 x 10^6 liters

• 3.5 x 10^6 liters

• 5.0 x 10^6 liters

A computer processes data at a rate of 4.0 x 10^9 bits per second. If it runs for 3 seconds, how many bits does it process in scientific notation?

• 2.0 x 10^10

• 1.0 x 10^10

• 1.2 x 10^10

• 1.5 x 10^10

A small battery can store 5.0 x 10^-3 joules of energy. If you have 10 such batteries, what is the total energy stored in scientific notation?

• 2.5 x 10^-2 joules

• 1.0 x 10^-2 joules

• 5.0 x 10^-1 joules

• 5.0 x 10^-2 joules