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Middle School Set 10 (2016) - Round 4 - Question 6

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TOSS-UP: ENERGY Multiple Choice

Electricity used to power a home in the United States is sold by what unit?

  • W. Kilojoule
  • X. Kilojoule per hour
  • Y. Kilowatt
  • Z. Kilowatt hour
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Middle School Set 2 (2008) - Round 7 - Question 9

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TOSS-UP: PHYSICAL SCIENCE Short Answer

If the distance separating two charges is tripled, the force between them decreases by what factor?

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Middle School Set 12 (2018) - Round 1 - Question 4

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BONUS: ENERGY Multiple Choice

Argonne National Lab researchers are studying colloids using high-powered microscopes. Which of the following is an example of a colloid?

  • W. Energy drink
  • X. Salt water
  • Y. Soda
  • Z. Milk
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Middle School Set 12 (2018) - Round 2 - Question 4

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BONUS: ENERGY Multiple Choice

Researchers at Lawrence Berkeley National Lab are examining organic carbon in soil as a potential source of greenhouse gases. Which of the following best describes their finding?

  • W. Soil carbon cannot be converted to carbon dioxide
  • X. Organisms release more carbon dioxide in cold soil than in warm soil
  • Y. Organisms release more carbon dioxide in warm soil than in cold soil
  • Z. Soil is a relatively static carbon sink
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Middle School Set 2 (2008) - Round 1 - Question 6

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TOSS-UP: EARTH SCIENCE Multiple Choice

Which of the following is present only where benthic organisms reside:

  • W. phytoplankton
  • X. zooplankton
  • Y. diatoms
  • Z. deep sea vents
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Middle School Set 7 (2013) - Round 2 - Question 14

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BONUS: PHYSICAL SCIENCE Multiple Choice

Which of the following is NOT true of metals?

  • W. They exist as extended planes of atoms
  • X. They are malleable and ductile
  • Y. They conduct electricity but do not conduct heat
  • Z. They can be combined to form alloys
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Middle School Set 7 (2013) - Round 4 - Question 8

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BONUS: LIFE SCIENCE Short Answer

What are the names of the two different groups of trees: those that generally lose their leaves in autumn and those with needle-shaped leaves with cones?

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Middle School Set 5 (2011) - Round 8 - Question 3

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BONUS: Energy Short Answer

What is the name of a device which consists of dissimilar metals joined together at one end that is used as a sensor for measuring temperature?

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Middle School Set 3 (2007) - Round 2 - Question 6

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TOSS-UP: PHYSICAL SCIENCE Multiple Choice

Which of the following atomic properties most directly determines that elements in the same group of the Periodic Table have similar chemical properties:

  • W. number of protons
  • X. number of valence electrons
  • Y. charge of protons
  • Z. stability of neutrons
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Middle School Set 9 (2015) - Round 2 - Question 10

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TOSS-UP: LIFE SCIENCE Multiple Choice

Forest fires are important in some ecosystems for all of the following reasons except:

  • W. They create a warmer climate, increasing precipitation
  • X. They thin understory, making way for increased growth
  • Y. They help clear dead and dying organisms
  • Z. They can remove non-native, non-fire-resistant species
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