Quantum ideas and where they are used
Grade 11 Science Worksheet
Circle the best answer, or write your answer on the line.
Protons in water respond at 42.577478461 MHz per tesla (CODATA). What radio frequency does an MRI scanner with a 3 T magnet use, to 0.01 MHz, Bo?
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?
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.
In the passage, what can a qubit do that an ordinary bit can't, Jun?
- Store far more files than a hard drive
- Be in a superposition of 0 and 1
- Work without electricity
In the passage, what happens when a qubit is measured, Kira?
- It gives one answer, 0 or 1
- It breaks
- It stays both 0 and 1, forever after
In the passage, why can listening in on a quantum message be noticed, Luz?
- Quantum messages are louder
- Listeners give off light
- Measuring it disturbs it
Would better instruments get around the uncertainty principle, Noah?
- Yes, with a bigger magnet
- Yes: it is caused by poor tools
- No: it is part of nature
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
Why does glowing hydrogen give off only certain colors, Ren?
- Its electrons have fixed energy levels
- Its gas is too cold to glow in other colors
- Its atoms are colored
How do astronomers know which elements are in a distant star, Tala?
- From the colored lines in its light
- From the star's size
- From its temperature alone
Why does a neon sign glow red-orange, Zee?
- The glass is painted
- Neon is hot like a flame
- Neon's electrons drop between its levels