Physics
Chem.
Biology
Psych.
Environ.
100

The attractive force that keeps objects on the ground.

What is gravity?

100

This lightweight gas is the most abundant chemical element in the universe.

What is Hydrogen?

100

This organelle is the "powerhouse of the cell".

What is mitochondria?
100

This type of memory holds a small amount of information, usually about 7 items, for roughly 20 to 30 seconds.

What is short-term memory? 

100

This primary greenhouse gas is released by burning fossil fuels like coal, oil, and natural gas.

What is carbon dioxide?

200

This famous law states that the acceleration of an object depends on the net force acting on it and inversely on its mass.

What is Newton's second law? 

200

This term describes the direct transition of a substance from a solid phase to a gas phase without passing through the liquid phase.

What is sublimation?

200

This multi-stage process is how body cells divide to create two genetically identical 'daughter cells'.

What is mitosis?

200

This intert treatment has no effect on the body, but can bring real symptom relief if the patient believes it is the real treatment.

What is a placebo?

200

This ecological term represents the maximum population size of a biological species that a specific environment can sustain indefinitely.

What is carrying capacity?

300

This property measures an object's resistance to any change in its state of motion

What is inertia?

300

Elements in Group 18 of the periodic table, like neon and argon, are called this because they rarely react with other elements.

What are noble gases?

300

Unlike eukaryotic cells, this type of cell lacks a membrane-bound nucleus.

What is a prokaryotic cell?

300

This main chemical messenger in the nervous system transmits signals across a synapse.

What is a neurotransmitter?


300

This type of species is the very first to colonize bare rock or previously disrupted ecosystems, kicking off ecological succession.

What is a pioneer species?

400

Named after a French physicist, this unit measures the flow of electrical current past a given point per second

What is an ampere (or amp)?

400

This specific type of reaction occurs when an acid and a base mix to produce water and a salt.

What is a neutralization reaction?

400

Hydrophobic in nature, this class of macromolecules includes fats, oils, and waxes.

What are lipids?

400

This phenomenon describes how people are less likely to help a person in need when others are present.

What is the bystander effect?

400

This group of gases trap heat in Earth's atmosphere, causing global temperatures to rise.

What are greenhouse gasses?

500

This effect is the apparent change in the frequency of a wave when the source and the observer move relative to each other.

What is The Doppler effect? 

500

This reaction is preformed to demonstrate chemical kinetics. Two colorless solutions are mixed and at first there is no visible reaction. After a short delay, the liquid suddenly turns black due to the acting ions getting "exhausted" and working slower.

What is the (Iodine) Clock Reaction?

500

This effect describes a sharp reduction in a population's size due to unexpected events, severely reducing a species' genetic diversity.

What is the bottleneck effect?

500

This American psychologist designed a box to study operant conditioning, using rats and pigeons to show how rewards shape behavior.

Who is/What is B.F. Skinner?

500

This term refers to liquid that has percolated through solid waste in a landfill, picking up suspended or dissolved materials in the process.

What is leachate?