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Middle School Set 7 (2013) - Round 13 - Question 13

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BONUS: GENERAL SCIENCE Multiple Choice

What determines how cells in a developing embryo will differentiate?

  • W. Symmetry after the first division of cells
  • X. The location of the cells in the embryo
  • Y. The number of cells in the embryo
  • Z. The DNA present in the cells of the embryo
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Middle School Set 14 (2020) - Round 9 - Question 3

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TOSS-UP: ENERGY Multiple Choice

Researchers at Idaho National Lab are working to improve nuclear reactor safety by preventing lanthanides [LAN-tha-nides] from causing damage. What atomic orbital generally contains the highest energy electrons for neutral lanthanide atoms?

  • W. P
  • X. S
  • Y. F
  • Z. G
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High School Set 6 (2012) - Round 12 - Question 7

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TOSS-UP: BIOLOGY Short Answer

Name the protein that polymerizes [puh-LIM-uh-ryz-es] to form microtubules.

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Middle School Set 8 (2014) - Round 8 - Question 9

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BONUS: PHYSICAL SCIENCE Multiple Choice

Which of the following statements about precipitation is FALSE?

  • W. Can occur by converting a soluble substance into an insoluble form
  • X. Results in a higher purity solid if higher concentration solutions are used
  • Y. Can be used to remove metal ions from aqueous solutions [AK-wee-uhs]
  • Z. Can occur by changing the composition of a solvent to diminish the solubility of a substance in it
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High School Set 9 (2015) - Round 16 - Question 6

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BONUS: Physics Multiple Choice

Which of the following is the sole variable that must be equal among different photons in order for electromagnetic radiation to be considered coherent?

  • W. Frequency
  • X. Direction
  • Y. Phase
  • Z. Polarization
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High School Set 7 (2013) - Round 17 - Question 19

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BONUS: Physics Multiple Choice

A lady in a spacecraft travelling away from the Earth at 4/5 the speed of light gives birth to a child at 1:00 p.m., which, according to the spacecraft’s clock, is only 3 hours after the spacecraft departed from the Earth. Assuming constant acceleration during those 3 hours, what is the child's birth time according to a stationary clock on the Earth?

  • W. 2:00 p.m.
  • X. 4:00 p.m.
  • Y. 6:00 p.m.
  • Z. 7:30 p.m.
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Middle School Set 14 (2020) - Round 9 - Question 8

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TOSS-UP: PHYSICAL SCIENCE Multiple Choice

Mary has a scale, which she decides to calibrate using a one-kilogram mass. Which of the following sets of measurements in kilograms reflect the most precise calibration?

  • W. 2.1, 2.1, 2.0
  • X. 0.6, 1.0, 1.4
  • Y. 1.0, 0.8, 0.6
  • Z. 0.7, 1.3, 1.0
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High School Set 7 (2013) - Round 1 - Question 4

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BONUS: Energy Multiple Choice

Lithium thionyl [THY-uh-nil] chloride batteries have low current delivery but long life spans. They are able to operate at a temperature range between -55° Celsius and 150° Celsius. Which of the following is least likely to be powered by a lithium thionyl chloride battery?

  • W. Speakers
  • X. Smoke detectors
  • Y. Diving equipment
  • Z. Wireless alarm systems
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Middle School Set 13 (2019) - Round 8 - Question 15

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BONUS: PHYSICAL SCIENCE Short Answer

Rank the following three materials in terms of increasing density: 1) Polystyrene; 2) Glass; 3) Gold.

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High School Set 12 (2018) - Round 8 - Question 22

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TOSS-UP: MATH Short Answer

If the probability of it raining on a given day is 0.21, what is the probability of it NOT raining?

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