Grade 11 · Science · Physics

11th grade Mass and energy: E = mc² worksheet

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Mass and energy: E = mc²

Grade 11 Science Worksheet - Building Confidence

NameDate

Circle the best answer, or write your answer on the line.

With c = 2.99792458 × 10⁸ m/s, how much energy equals 2 kg of mass, in units of 10¹⁶ J, to 0.01, Bo?
With c = 2.99792458 × 10⁸ m/s, how much energy equals 0.5 kg of mass, in units of 10¹⁶ J, to 0.01, Esme?
Read this first
Use this
The products have slightly less mass.
3.
In the photon diagram, which has more mass in total, Jun?
- They have equal mass
- The starting nuclei
- The products
4.
In the photon diagram, what happens to the missing mass, Kira?
Use the picture in question 3.
- It is left behind as dust
- It hides inside the neutron
- It is released as energy
5.
In the photon diagram, what is this process called, Luz?
Use the picture in question 3.
- Fission
- Burning
- Fusion
6.
What powers the Sun, Milo?
- Fusing hydrogen into helium
- Splitting uranium nuclei
- Burning coal in its core
7.
In a nuclear power plant, what does the energy from fission do first, Pia?
- Heats water into steam
- Lights bulbs on its own
- Charges batteries
8.
What does E = mc² say, Ren?
- Mass can change into energy
- Mass and energy are unrelated
- Energy is mass times sound's speed
9.
Why does a tiny mass give a huge energy in E = mc², Tala?
- Mass is measured in tonnes
- Energy is measured in grams
- c² is a very big number
10.
In a fusion reaction, how much of the mass becomes energy, Zee?
- Most of it
- A tiny fraction, under 1%
- About half

Mass and energy: E = mc². Every version has 10 questions, and the answer key prints on the second page.

I can use E = mc² and say why a tiny mass is a huge energy.
I can find the energy from a mass defect: (mass before − mass after) × 931.494 MeV per u.
I can explain fusion (the Sun) and fission (today's nuclear power plants) as energy sources, and why both release energy.
I can find how much mass equals a power plant's output over days.

Standard: HS-PS1-8

mass defect: The mass lost when nuclei join or split; it becomes energy

fusion: Light nuclei joining into a heavier one

fission: A heavy nucleus splitting into lighter ones

atomic mass unit (u): One-twelfth of a carbon-12 atom's mass; 931.494 MeV of energy

binding energy: The energy needed to pull a nucleus apart

Your child used ½mc², like kinetic energy. Mass-energy has no half: E = mc².

Your child turned the whole mass into energy. Only the small lost mass, before minus after, becomes energy.

Your child used c in km/s. E = mc² needs c in m/s: 2.99792458 × 10⁸ m/s.

What is the most common mistake with mass and energy: e = mc²?

Your child used ½mc², like kinetic energy. Mass-energy has no half: E = mc².

Are these 11th grade science worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

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