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High School Set 14 (2020) - Round 6 - Question 18

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BONUS: Energy Multiple Choice

Researchers at SLAC [slack] National Accelerator Lab are studying what happens when a material is suddenly demagnetized. If a metallic wire were wrapped around the material being demagnetized, what would occur in the wire?

  • W. Any current would be strongly suppressed
  • X. Alternating current would be rectified to direct current
  • Y. The wire would show increased resistance
  • Z. A direct current would be induced in the wire
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High School Set 9 (2015) - Round 3 - Question 7

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TOSS-UP: Energy Short Answer

When rubber is vulcanized in order to make it more durable, what element is added to the rubber?

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High School Set 13 (2019) - Round 3 - Question 15

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TOSS-UP: Energy Short Answer

Observations made with the Laser Interferometer [inter-feer-AW-meh-ter] Gravitational-Wave Observatory, or LIGO, mark the dawn of gravitational wave astronomy. What is the ratio of the speed of gravitational waves to the speed of light?

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High School Set 13 (2019) - Round 5 - Question 12

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TOSS-UP: BIOLOGY Multiple Choice

Which of the following plant hormones play a role in fruit ripening?

  • W. Gibberellins [jib-er-ELL-ins]
  • X. Abscisic [ab-SIH-zik] acid
  • Y. Cytokinins [sigh-toh-KYE-nins]
  • Z. Brassinosteroids
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High School Set 11 (2017) - Round 6 - Question 2

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TOSS-UP: Chemistry Multiple Choice

Which of the following is considered a strong acid?

  • W. Hydrofluoric acid
  • X. Nitric acid
  • Y. Formic acid
  • Z. Nitrous acid
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Middle School Set 13 (2019) - Round 1 - Question 16

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TOSS-UP: PHYSICAL SCIENCE Short Answer

In millivolts, what voltage is needed to produce a current of 3 milliamperes over a piece of metal with a resistance of 2 ohms?

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Middle School Set 4 (2010) - Round 7 - Question 5

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TOSS-UP: Earth and Space Science Multiple Choice

If convection currents in the mantle stopped, which of the following would likely happen?

  • W. The number of earthquakes would increase
  • X. The number of earthquakes would stay the same
  • Y. Earthquakes would get stronger
  • Z. The number of earthquakes would decrease
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High School Set 14 (2020) - Round 8 - Question 3

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TOSS-UP: Energy Multiple Choice

Researchers at Brookhaven National Lab are studying electron-hole pairing in the superconducting material lanthanum [LAN-tha-num] barium copper oxide, or LBCO. Which of the following is the characteristic of LBCO they are studying?

  • W. It heats up substantially when an external magnetic field is shut off
  • X. Its conductance increases rapidly below 40 kelvins
  • Y. It develops a strong spontaneous electric polarization in response to mechanical stress
  • Z. It undergoes strong resonance oscillation in response to an oscillating electric field
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Middle School Set 15 (2021) - Round 2 - Question 15

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TOSS-UP: PHYSICAL SCIENCE Short Answer

In newtons with one significant figure, what is the magnitude of the gravitational force that a 30-kilogram child exerts on Earth while standing on its surface?

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High School Set 8 (2014) - Round 4 - Question 2

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BONUS: BIOLOGY Multiple Choice

Which of the following statements is NOT true of an r-selected species?

  • W. The mother produces a large number of eggs that suffer heavy predation
  • X. The mother reaches sexual maturity early in life
  • Y. The parents provide long-term care for the offspring
  • Z. The species is more successful in unstable environments
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