A scientist measures the mass of a small particle as 3.2 x 10^-27 kg and another particle as 1.5 x 10^-26 kg. What is the total mass of both particles in standard form?
Mastering Scientific Notation: Sums & Differences Challenge

Quiz
•
English, Mathematics
•
8th Grade
•
Hard
Anthony Clark
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
4.7 x 10^-27 kg
1.0 x 10^-25 kg
1.82 x 10^-26 kg
2.5 x 10^-26 kg
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A comet is traveling at a speed of 2.5 x 10^4 km/h. If it slows down by 1.2 x 10^3 km/h, what is its new speed in standard form?
2.4 x 10^4 km/h
2.5 x 10^4 km/h
2.38 x 10^4 km/h
1.2 x 10^4 km/h
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 spaceship travels 1.5 x 10^15 meters towards the star, how far is it from the star now in standard form?
4.05 x 10^16 meters
3.9 x 10^16 meters
4.5 x 10^16 meters
4.0 x 10^16 meters
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A bacterium can reproduce every 2 hours, and after 8 hours, there are approximately 2.5 x 10^6 bacteria. If half of them die, how many bacteria remain in standard form?
2.0 x 10^6
2.5 x 10^5
1.0 x 10^6
1.25 x 10^6
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A cell phone tower emits a signal of 3.0 x 10^-5 watts. If a second tower emits 1.2 x 10^-5 watts, what is the total power emitted by both towers in standard form?
3.5 x 10^-5 watts
5.0 x 10^-5 watts
2.5 x 10^-5 watts
4.2 x 10^-5 watts
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A researcher finds that a certain chemical is present in a solution at a concentration of 4.5 x 10^-3 mol/L. If another solution has a concentration of 2.0 x 10^-3 mol/L, what is the total concentration when mixed in standard form?
4.0 x 10^-3 mol/L
5.5 x 10^-3 mol/L
7.0 x 10^-3 mol/L
6.5 x 10^-3 mol/L
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A satellite orbits Earth at a height of 3.6 x 10^7 meters. If it descends by 1.2 x 10^6 meters, what is its new height in standard form?
3.6 x 10^7
3.6 x 10^6
3.588 x 10^7
3.5 x 10^7
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