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11th grade Quantum ideas and where they are used worksheet

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Quantum ideas and where they are used

Grade 11 Science Worksheet

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

  1. Protons in water respond at 42.577478461 MHz per tesla (CODATA). What radio frequency does an MRI scanner with a 1.5 T magnet use, to 0.01 MHz, Ari?

  2. Protons in water respond at 42.577478461 MHz per tesla (CODATA). What radio frequency does an MRI scanner with a 0.55 T magnet use, to 0.01 MHz, Esme?

  3. Read this first

    Photon diagram beside a short passage

    “A qubit can be in a superposition of 0 and 1 until it is measured; then it gives one answer. Measuring a quantum signal disturbs it, so someone listening in on a quantum message can be noticed.” The diagram shows a qubit arrow between 0 and 1.

  4. In the passage, what can a qubit do that an ordinary bit can't, Jun?

    • Work without electricity
    • Store far more files than a hard drive
    • Be in a superposition of 0 and 1

  5. In the passage, what happens when a qubit is measured, Kira?

    • It gives one answer, 0 or 1
    • It stays both 0 and 1, forever after
    • It breaks

  6. In the passage, why can listening in on a quantum message be noticed, Luz?

    • Measuring it disturbs it
    • Listeners give off light
    • Quantum messages are louder

  7. What does the uncertainty principle say, in plain terms, Milo?

    • Position and momentum can't both be known exactly
    • Electrons don't exist
    • Small particles can't be measured by any tool or method

  8. Would better instruments get around the uncertainty principle, Noah?

    • Yes: it is caused by poor tools
    • Yes, with a bigger magnet
    • No: it is part of nature

  9. Why don't we notice the uncertainty principle with a rolling ball, Pia?

    • Balls are much too smooth for the effect to show
    • The effect is far too small at that size
    • Balls aren't made of atoms

  10. Why does glowing hydrogen give off only certain colors, Ren?

    • Its gas is too cold to glow in other colors
    • Its atoms are colored
    • Its electrons have fixed energy levels

  11. How do astronomers know which elements are in a distant star, Tala?

    • From the star's size
    • From the colored lines in its light
    • From its temperature alone
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11th grade Quantum ideas and where they are used worksheet – printable
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About this worksheet

Quantum ideas and where they are used. Every version has 10 questions, and the answer key prints on the second page.

What your child will learn

  • I can say what a quantum is (the smallest step an amount can change by) and that atoms have set energy levels, which give each element its own spectral lines.
  • I can explain, in plain terms, superposition (a qubit holds 0 and 1 until measured) and the uncertainty principle (position and momentum can't both be known exactly; this is nature, not poor tools).
  • I can describe how lasers, LEDs, solar cells and MRI scanners work, and find an LED's color from its gap, an MRI frequency from its field, and an electron's wavelength.
  • I can check a "quantum" claim against evidence.

Standard: none (TX)

Words to know

quantum: The smallest step an amount, like energy, can change by

superposition: Being in a mix of states, like 0 and 1, until measured

qubit: A quantum bit that can be in a superposition of 0 and 1

uncertainty principle: Position and momentum can't both be known exactly at once

energy gap: The energy step an electron drops across in an LED

Common mistakes

Your child multiplied. The wavelength is hc ÷ E: a bigger energy gap gives a shorter wavelength.

Your child divided by the field. The MRI frequency grows with the field: f = 42.577 MHz per tesla × B.

Your child used the speed as m/s, not millions of m/s. Keep the 10⁶ in λ = h ÷ mv.

Questions parents ask

What is the most common mistake with quantum ideas and where they are used?

Your child multiplied. The wavelength is hc ÷ E: a bigger energy gap gives a shorter wavelength.

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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