This layer of earth's atmosphere is where most of our weather occurs.
What is the troposphere?
100
This is the when the nuclear membrane disappears during mitosis.
What is prophase?
100
A kilogram consists of this amount of centigrams.
What is 100,000 [centigrams]?
100
Find the product of the fourth multiple of four and the third multiple of three.
What is 144?
100
Galileo mostly used this simple machine to conclude the existence of friction.
What is an inclined plane?
200
This planet has the most circular orbit.
What is Venus?
200
This system for naming species was developed by the scientist Linnaeus, and consists of genus and species of the creature.
What is binomial nomenclature?
200
This is the SI unit for weight.
What is the newton?
200
This is the square root of 1024...as well as the fifth power of 2.
What is 32?
200
Any element with an atomic number greater than this number is unstable.
What is 83?
300
This unit of measurement equals 3.26 light years.
What is a parsec?
300
"Cells come only from other living cells" is the main idea of this theory.
What is the cell theory?
300
This psychiatrist/neurologist coined the terms "id", "ego", and "superego" and made major contributions in the field of psychoanalysis.
Who is [Sigmund] Freud?
300
This is the sum of the internal angles of a hexagon.
What is 720 degrees?
300
This device can be made by combining two basic kinds of solid state rectifiers, resulting in the device's ability to both amplify and rectify a current.
What is the transistor?
400
Saturn's moons consist mainly of this substance.
What is ice/water?
400
This German physicist (1845-1923) discovered X-rays in 1895, which won him a Nobel Prize in 1901.
Who is [Wilhelm] Roentgen?
400
Earth's air consists primarily of nitrogen, oxygen, and this noble gas.
What is argon?
400
This is the arithmetic mean of 84, 50, 73, 27, and 16.
What is 50?
400
This scientist invented the electromagnet by wrapping wire around an iron rod and sending an electrical current through the wire.
Who is [William] Sturgeon?
500
This kind of cloud often forms over mountaintops, and is named for its smooth, round, lens-like appearance.
What is lenticular?
500
This reproductive isolating mechanism involves mating calls and courtship rituals to ensure that members of the same species mate only with each other.
What is behavioral isolation?
500
This tree's wood is prized in terms of furniture-making. Its name is Juglans nigra.
What is [black] walnut?
500
What does square root of (6 + square root of (6 + square root of (6 +...))) equal?
What is 3?
500
The lowest frequency that determines the pitch of a musical note is often called this.