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High School Set 13 (2019) - Round 1 - Question 1

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TOSS-UP: Earth and Space Multiple Choice

Which of the following best describes the luster of cut diamonds?

  • W. Adamantine [ad-ah-MAN-teen]
  • X. Vitreous [VIH-tree-us]
  • Y. Pitchy
  • Z. Resinous [REH-zin-us]
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High School Set 13 (2019) - Round 1 - Question 1

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BONUS: Earth and Space Multiple Choice

The evolution of oxygenic photosynthesis marked a significant change in Earth history that led to permanent changes in the redox state of Earth’s atmosphere and had lasting impacts on Earth’s organisms. Which of the following best describes when the evolution of oxygenic photosynthesis occurred relative to the Cambrian Explosion?

  • W. One billion years after the Cambrian Explosion
  • X. The same time as the Cambrian Explosion
  • Y. Two billion years before the Cambrian Explosion
  • Z. Three billion years before the Cambrian Explosion
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High School Set 13 (2019) - Round 1 - Question 2

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TOSS-UP: BIOLOGY Short Answer

The most common high-energy intermediate used to drive biological reactions contains what nucleobase?

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High School Set 13 (2019) - Round 1 - Question 2

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BONUS: BIOLOGY Short Answer

What type of plant cell opens and closes stomata in leaves?

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High School Set 13 (2019) - Round 1 - Question 3

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TOSS-UP: MATH Multiple Choice

When in standard position, which of the following angles has its terminal side in the fourth quadrant?

  • W. 3π/2
  • X. 5π/4
  • Y. 8π/5
  • Z. 13π/6
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High School Set 13 (2019) - Round 1 - Question 3

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BONUS: MATH Short Answer

How many different five-digit integers are palindromes that contain three different digits?

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High School Set 13 (2019) - Round 1 - Question 4

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TOSS-UP: Chemistry Short Answer

When performing a titration [tie-TRAY-shun], what point is defined as the point at which the indicator changes color?

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High School Set 13 (2019) - Round 1 - Question 4

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BONUS: Chemistry Multiple Choice

Which of the following solutions or substances will have the highest vapor pressure at room temperature?

  • W. Water with 0.1 mole fraction sodium chloride
  • X. Water with 0.1 mole fraction sucrose
  • Y. Water with 0.1 mole fraction ethanol
  • Z. Pure water
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High School Set 13 (2019) - Round 1 - Question 5

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TOSS-UP: Energy Short Answer

Researchers at Lawrence Berkeley National Lab are using nanoscale imaging techniques to study a biological process that is analogous to a process plants use, but in which the water splitting is artificially produced. What biological process is this?

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High School Set 13 (2019) - Round 1 - Question 5

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BONUS: Energy Short Answer

Researchers at Los Alamos National Lab are studying how to convert sugars to fuels. One of the sets of reactions they are studying converts glucose into what three-carbon alkane?

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