A scientist measures the mass of a small particle as 3.5 x 10^-27 kg. If another particle has a mass of 1.2 x 10^-27 kg, what is the difference in their masses in scientific notation?
7th Grade Scientific Notation: Subtraction & Multiplication Challenges

Quiz
•
English, Mathematics
•
7th Grade
•
Hard
Anthony Clark
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1.5 x 10^-27 kg
3.0 x 10^-27 kg
2.3 x 10^-27 kg
4.7 x 10^-27 kg
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A cell in a petri dish contains 2.5 x 10^6 bacteria. After a day, the number of bacteria doubles. How many bacteria are there now, expressed in scientific notation?
1.0 x 10^7
5.0 x 10^5
2.0 x 10^6
5.0 x 10^6
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The distance from Earth to a nearby star is approximately 4.2 x 10^16 meters. If a spacecraft travels 1.5 x 10^16 meters towards the star, how far is it from the star now in scientific notation?
4.0 x 10^16 meters
1.2 x 10^16 meters
3.5 x 10^16 meters
2.7 x 10^16 meters
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A comet is traveling at a speed of 2.3 x 10^4 km/h. If it travels for 3.5 hours, how far does it travel in scientific notation?
9.1 x 10^4 km
6.3 x 10^4 km
7.5 x 10^4 km
8.05 x 10^4 km
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A researcher finds that a certain chemical is present in a solution at a concentration of 5.0 x 10^-3 mol/L. If 2.0 x 10^-3 mol/L is removed, what is the new concentration in scientific notation?
5.0 x 10^-3 mol/L
2.0 x 10^-3 mol/L
3.0 x 10^-3 mol/L
4.0 x 10^-3 mol/L
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The height of a mountain is approximately 8.8 x 10^3 meters. If a valley is 2.5 x 10^3 meters deep, what is the difference in height between the mountain and the valley in scientific notation?
6.3 x 10^3
1.13 x 10^4
9.0 x 10^3
1.0 x 10^4
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A computer processes data at a rate of 1.2 x 10^9 bits per second. How much data can it process in 5 seconds, expressed in scientific notation?
7.2 x 10^9 bits
6.0 x 10^9 bits
5.0 x 10^9 bits
1.0 x 10^9 bits
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