Quantum Tunneling Basics Quiz Explore This Quantum Phenomenon

Grade 9th

Reviewed by Ekaterina Yukhnovich

Ekaterina Yukhnovich, PhD |

Science Expert

Review Board Member

Ekaterina V. is a physicist and mathematics expert with a PhD in Physics and Mathematics and extensive experience working with advanced secondary and undergraduate-level content. She specializes in combinatorics, applied mathematics, and scientific writing, with a strong focus on accuracy and academic rigor.

, PhD

By Thames

Thames

Community Contributor

Quizzes Created: 11119 | Total Attempts: 9,762,531

| Questions: 20 | Updated: Mar 12, 2026

Share on Facebook Share on Twitter Share on Whatsapp Share on Pinterest Share on Email Copy to Clipboard Embed on your website

Question 1 / 21

🏆 Rank #-- ▾

0 %

0/100

Score 0/100

1. In tunneling, the particle can be detected on the ______ side of the barrier.

Before measurement, we talk about probabilities. After measurement, the particle is found in one location, sometimes beyond the barrier.

Explanation

Before measurement, we talk about probabilities. After measurement, the particle is found in one location, sometimes beyond the barrier.

Submit

About This Quiz

Quantum Tunneling Basics Quiz Explore This Quantum Phenomenon - Quiz

This assessment explores the fascinating concept of quantum tunneling, evaluating your understanding of its principles and implications. Key concepts include the nature of particle behavior at quantum scales and the significance of tunneling in various scientific fields. Engaging with this material enhances your grasp of quantum mechanics, making it relevant... see morefor students and enthusiasts alike. see less

2. What first name or nickname would you like us to use?

You may optionally provide this to label your report, leaderboard, or certificate.

2. Grade 9 wrap-up: tunneling is best viewed as:

A classical jump

A quantum probability effect that can allow crossing a classically forbidden barrier

A temperature effect only

A force field generator

Tunneling comes from the wave-like state description and its probabilities. It explains rare but real barrier-crossing events for small particles.

Explanation

Tunneling comes from the wave-like state description and its probabilities. It explains rare but real barrier-crossing events for small particles.

Submit

3. You usually need many trials to measure tunneling probability accurately.

True

False

Tunneling is probabilistic, so a single event doesn’t give a reliable rate. Many trials reveal the frequency of tunneling outcomes.

Explanation

Tunneling is probabilistic, so a single event doesn’t give a reliable rate. Many trials reveal the frequency of tunneling outcomes.

Submit

4. In quantum physics, the 'chance' of tunneling is tied to the particle’s:

Shoe size

Wave function/probability description

Colour

Smell

The wave function gives probability information. Inside a barrier, it decreases but can remain non-zero.

Explanation

The wave function gives probability information. Inside a barrier, it decreases but can remain non-zero.

Submit

5. If the barrier is higher, tunneling generally becomes:

Easier

Harder (lower probability)

Guaranteed

Unchanged

A higher barrier makes the classically forbidden region 'more forbidden.' The probability typically drops.

Explanation

A higher barrier makes the classically forbidden region 'more forbidden.' The probability typically drops.

Submit

6. Tunneling does not violate energy conservation in the basic quantum description.

True

False

Tunneling is not 'free energy.' It’s a probability of being found across the barrier consistent with quantum rules and conservation laws.

Explanation

Tunneling is not 'free energy.' It’s a probability of being found across the barrier consistent with quantum rules and conservation laws.

Submit

7. Which factors tend to affect tunneling probability?

Barrier thickness

Barrier height (how 'hard' it is to cross)

Particle properties (like mass/energy)

The colour of the barrier paint

Probability depends on barrier shape and particle characteristics. Paint colour is not part of the physics model.

Explanation

Probability depends on barrier shape and particle characteristics. Paint colour is not part of the physics model.

Submit

8. A 'classically forbidden region' means:

A region with no atoms

A region a classical particle cannot enter due to energy limits

A region with no gravity

A region with only light

Classically, energy rules stop entry. Quantum mechanics can still assign a non-zero probability there.

Explanation

Classically, energy rules stop entry. Quantum mechanics can still assign a non-zero probability there.

Submit

9. Quantum tunneling is important at very small scales, not usually for everyday objects like footballs.

True

False

For large objects, tunneling probabilities are unbelievably tiny. For small particles, tunneling can be measurable and important.

Explanation

For large objects, tunneling probabilities are unbelievably tiny. For small particles, tunneling can be measurable and important.

Submit

10. Which change would most likely increase tunneling probability?

Make the barrier thicker

Make the barrier thinner

Lower the temperature of the detector only

Make the particle heavier

Thinner barriers reduce how much the probability fades inside. That generally increases the chance of appearing beyond the barrier.

Explanation

Thinner barriers reduce how much the probability fades inside. That generally increases the chance of appearing beyond the barrier.

Submit

11. Quantum tunneling is when a particle:

Melts through a wall

Has a chance to pass through a barrier even if it seems it doesn’t have enough energy

Always bounces off barriers

Travels faster than light

In quantum physics, particles are described by probability waves, not just point objects. That means there can be a small chance to appear on the other side of a barrier.

Explanation

In quantum physics, particles are described by probability waves, not just point objects. That means there can be a small chance to appear on the other side of a barrier.

Submit

12. Which statement is the best grade 9 summary?

Tunneling is magic with no rules

Tunneling is a quantum probability effect that can allow barrier crossing

Tunneling happens only to planets

Tunneling always happens

Quantum mechanics uses rules to calculate probabilities. Tunneling is one outcome those rules can allow in certain conditions.

Explanation

Quantum mechanics uses rules to calculate probabilities. Tunneling is one outcome those rules can allow in certain conditions.

Submit

13. If tunneling occurs, it does not mean the particle 'breaks' the barrier; it means probability allows crossing.

True

False

Tunneling is not a mechanical drilling through material. It’s about how quantum states predict outcomes across a barrier.

Explanation

Tunneling is not a mechanical drilling through material. It’s about how quantum states predict outcomes across a barrier.

Submit

14. In a simple picture, tunneling is most likely when the barrier is:

Very thick

Thin

Made of wood

Painted blue

The probability wave decreases inside the barrier region. A thinner barrier means less decrease, so more chance remains on the far side.

Explanation

The probability wave decreases inside the barrier region. A thinner barrier means less decrease, so more chance remains on the far side.

Submit

15. Which is a common real-world example of tunneling?

A ball rolling uphill by itself

Radioactive decay in some nuclei (alpha decay)

Ice freezing

Wind blowing

In alpha decay, a particle can escape the nucleus even though it is classically trapped by a barrier. Tunneling provides a simple explanation for that escape.

Explanation

In alpha decay, a particle can escape the nucleus even though it is classically trapped by a barrier. Tunneling provides a simple explanation for that escape.

Submit

16. Tunneling probability can be small but not always zero.

True

False

Quantum mechanics often gives probabilities rather than certainties. Even if the chance is tiny, it may still be possible.

Explanation

Quantum mechanics often gives probabilities rather than certainties. Even if the chance is tiny, it may still be possible.

Submit

17. If the barrier becomes thicker, the chance of tunneling generally:

Increases

Decreases

Stays the same

Becomes 100%

A thicker barrier makes the wave-like probability “fade” more before reaching the other side. That usually reduces the tunneling probability.

Explanation

A thicker barrier makes the wave-like probability “fade” more before reaching the other side. That usually reduces the tunneling probability.

Submit

18. A region that is hard to cross is called a potential ____.

A barrier is a region where crossing is classically forbidden due to energy limits. Quantum tunneling describes a small probability of crossing anyway.

Explanation

A barrier is a region where crossing is classically forbidden due to energy limits. Quantum tunneling describes a small probability of crossing anyway.

Submit

19. The best simple reason tunneling can happen is that particles have:

Invisible drills

Wave-like behavior and probabilities

Extra batteries inside

Negative mass

The particle’s state can “spread” into the barrier region. If the probability is not zero beyond the barrier, detection on the far side is possible.

Explanation

The particle’s state can “spread” into the barrier region. If the probability is not zero beyond the barrier, detection on the far side is possible.

Submit

20. In classical physics, a particle with less energy than a barrier height cannot cross it.

True

False

Classically, if you don’t have enough energy, you reflect back. Tunneling is a quantum effect that breaks that classical expectation.

Explanation

Classically, if you don’t have enough energy, you reflect back. Tunneling is a quantum effect that breaks that classical expectation.

Submit

Thank you for your feedback!

View My Results

Ekaterina Yukhnovich |PhD |

Science Expert

Quantum Tunneling Nuclear Decay Quiz: Test Your Physics Insight Quantum Tunneling Nuclear Decay Quiz: Test Your Physics Insight

Tunneling Probability Practice Quiz: Test Your Quantum Logic Tunneling Probability Practice Quiz: Test Your Quantum Logic

Thank you for your feedback!

Would you like to edit this question to improve it?

No thanks

Name:

Email:

Oops! Give us more information:

Incorrect Question

Incorrect Answer

Typos

I have a feedback

Please provide name and email to proceed. Please provide correct email to proceed. Please provide feedback. Please select the option.

All (20)
Unanswered ()
Answered ()

In tunneling, the particle can be detected on the ______ side of the...

Grade 9 wrap-up: tunneling is best viewed as:

You usually need many trials to measure tunneling probability...

In quantum physics, the 'chance' of tunneling is tied to the...

If the barrier is higher, tunneling generally becomes:

Tunneling does not violate energy conservation in the basic quantum...

Which factors tend to affect tunneling probability?

A 'classically forbidden region' means:

Quantum tunneling is important at very small scales, not usually for...

Which change would most likely increase tunneling probability?

Quantum tunneling is when a particle:

Which statement is the best grade 9 summary?

If tunneling occurs, it does not mean the particle 'breaks' the...

In a simple picture, tunneling is most likely when the barrier is:

Which is a common real-world example of tunneling?

Tunneling probability can be small but not always zero.

If the barrier becomes thicker, the chance of tunneling generally:

A region that is hard to cross is called a potential ____.

The best simple reason tunneling can happen is that particles have:

In classical physics, a particle with less energy than a barrier...

Your Rank: #-- / --

Leaderboard