Life, Personal & Social Science
These tiny air sacs in the lungs provide a large surface area for oxygen and carbon dioxide to diffuse between air and blood.
What are alveoli?
This mineral property describes resistance to scratching and is ranked using the Mohs scale.
What is hardness?
This subatomic particle has a negative electric charge.
What is an electron?
In an experiment, this is the variable the researcher deliberately changes.
What is the independent variable?
The advisor(s) of Science Olympiad
Mrs. Bawaney & Ms. Kim
In a cross between two heterozygous parents, Aa×Aa, this fraction of offspring is expected to have the genotype aa.
What is one-fourth, or 25%?
At this type of plate boundary, one tectonic plate descends beneath another into the mantle.
What is a convergent boundary?
A solution has a hydrogen-ion concentration of 1.0×10^−3 moles per liter. This is its pH.
What is 3?
A balance consistently reports masses 5 grams above their true values. This is the type of measurement error that produces the consistent offset.
What is systematic error?
A calculator class which includes digital calculators such as desmos on a phone or computer
During an outbreak investigation, 36 of 120 people who ate a particular food become ill. This is the attack rate among those who ate that food, expressed as a percentage.
What is 30%?
A star has a measured parallax angle of 0.05 arcseconds. Using d=1/pd = 1/pd=1/p, this is its distance in parsecs.
What is 20 parsecs?
A wave has a frequency of 5 hertz and a wavelength of 2 meters. This is its speed.
What is 10 meters per second?
A study finds that students who sleep more tend to earn higher grades. However, it cannot establish that sleep caused the higher grades. This familiar principle explains the limitation.
What is “correlation does not imply causation”?
Science Olympiad’s three student divisions are designated A, B, and C. Name the grade range associated with each division.
What are A: K–6, B: 6–9, and C: 9–12?
Fertilizer runoff adds excess nitrogen and phosphorus to a lake, promoting algal blooms and potentially causing oxygen depletion. This nutrient-enrichment process has this name.
What is eutrophication?
An earthquake’s P waves can travel through this major layer of Earth, but S waves cannot, providing evidence that the layer is liquid.
What is the outer core?
A 2.0-kilogram cart starts from rest. A constant net force of 6.0 newtons acts on it for 4.0 seconds. This is its final speed.
What is 12 meters per second?
At a significance threshold of α=0.05\alpha = 0.05α=0.05, a researcher rejects a null hypothesis that is actually true. This is the name of the error committed.
What is a Type I error, or false positive?
A full Science Olympiad tournament features this many official scored events per division, excluding trial events.
What is 23 events?
After activation, B lymphocytes can differentiate into these specialized cells that secrete large quantities of antibodies.
What are plasma cells?
A rock originally contained 80 milligrams of a radioactive parent isotope and now contains 10 milligrams. If the isotope’s half-life is 200 million years and the system remained closed, this is the rock’s age.
What is 600 million years?
For the reaction 2H2+O2→2H2O, you begin with 5.0 moles of hydrogen and 2.0 moles of oxygen. This is the maximum number of moles of water that can form.
What is 4.0 moles?
the cipher used to create the code: "zjplujl vsftwphk pz aol ilza"
what is a caesar cipher?
Science Olympiad held its first annual National Tournament in this year.
(Hint: during the same decade of the first Space Shuttle flights)
What is 1985?