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Middle School Set 13 (2019) - Round 14 - Question 1

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BONUS: EARTH AND SPACE SCIENCE Multiple Choice

Which of the following is believed to have led to the oxygenation of Earth's atmosphere approximately 2.4 billion years ago?

  • W. Increase in the photolysis [foh-TAWL-ih-sis] of water by UV radiation
  • X. Evolution of oxygenic photosynthesis
  • Y. Increase in volcanic outgassing
  • Z. Collision with a comet
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Middle School Set 11 (2017) - Round 1 - Question 9

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BONUS: EARTH AND SPACE SCIENCE Short Answer

The thin, upper fraction of the pelagic zone is known as what?

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Middle School Set 3 (2007) - Round 13 - Question 25

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BONUS: MATH Short Answer

Simplify the following expression if x represents a negative quantity: -(16x4)1/4

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Middle School Set 4 (2010) - Round 5 - Question 23

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BONUS: MATH Short Answer

Put these values in order from least to greatest: 0.99, 1.25, 14/15, 0.0099, -17.

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Middle School Set 11 (2017) - Round 10 - Question 12

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BONUS: PHYSICAL SCIENCE Short Answer

What two elements are liquids at standard room temperature and pressure?

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Middle School Set 14 (2020) - Round 12 - Question 11

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BONUS: MATH Short Answer

The mean number of weekly work hours for 16 part-time employees at a store is 17. The mean number of hours for 5 of the employees is 13. To the nearest whole number, what is the mean number of hours for the rest of the employees?

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Middle School Set 1 (2009) - Round 18 - Question 15

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BONUS: PHYSICAL SCIENCE Short Answer

When the following chemical equation is balanced, the coefficient of oxygen will be what value: CH4 + O2 →  CO2 + H2O

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Middle School Set 5 (2011) - Round 8 - Question 13

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BONUS: PHYSICAL SCIENCE Short Answer

Name three ferromagnetic elements.

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Middle School Set 14 (2020) - Round 2 - Question 21

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TOSS-UP: LIFE SCIENCE Multiple Choice

Keratin and hemoglobin are both examples of which of the following macromolecules?

  • W. Carbohydrates
  • X. Nucleic [new-CLAY-ik] acids
  • Y. Proteins
  • Z. Lipids
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Middle School Set 13 (2019) - Round 13 - Question 7

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BONUS: PHYSICAL SCIENCE Short Answer

Suppose that a mass is accelerated at a constant acceleration of 5 meters per second squared from a velocity of 10 meters per second to 20 meters per second. In meters, what is the distance traveled by the object in this duration?

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