Biology
Earth and Space
Earth Science
Physics
Chemistry
100

The most common term used in genetics to describe the observable physical characteristics of an organism caused by the expression of a gene or set of genes.

What is a Phenotype?
100

A force of attraction between objects that is due to their masses.

What is gravity?
100

Atmospheric gas created naturally by the action of sunlight on molecular oxygen.

What is Ozone?
100

This physical property of neutrinos, which was confirmed in the past decade, contradicts earlier assumptions that neutrinos travel at the speed of light.

What is mass?
100

Molecules with a partial charge.

What are polar molecules?
200

The genetic transmission of characteristics from parent to offspring.

What is Heridity?
200

A region of the sky that contains a recognizable star pattern and that is used to describe the location of objects in space. These objects appear to stay in place.

What is a constellation?
200

Dome shaped intrusion.

What is a Laccolith?
200

The property of a sound wave that is most commonly associated with loudness.

What is amplitude?

200

Massless packet of energy, which behaves like both a wave and a particle.

What is a Photon?

300

A passive movement of water molecules through a semi permeable membrane.

What is Osmosis?
300
Smaller streams and rivers that flow into a main river.
What are Tributaries?
300

The most common name for the temperature-slope or depth-interval over which temperature changes with depth in a lake.

What is Thermocline?

300

The part of an electric motor that functions as an electromagnet.

What is Armature?
300

An element that undergoes nuclear decay to form a daughter isotope.

What is a parent isotope?
400

Movement into a cell.

What is Endocytosis?
400

A small object in space which orbits a star and is made of a rocky core surrounded by ice, dust particles, and frozen gases.

What is a comet?
400

The general term for a salt of one of the halogens.

What is a Halide?
400

Constant given as the amount of electric charge per mole of electrons.

What is the Faraday Constant?

400

Ionic compounds that can be formed by replacing one or more of the hydrogen ions of an acid with another positive ion.

What are salts?
500

Folds in the mitochondria that increase the surface area and therefore its ability to produce ATP.

What are Cristae?
500

A spherical celestial body revolving about the sun, similar to a planet but not large enough to gravitationally clear its orbital region of most or all other celestial bodies.

What is a Dwarf Planet?
500

Natural mountain building.

What is Orogeny?
500

Type of emission, first theorized by Albert Einstein, where a photon interacts with an atom’s electron which, when it returns to a ground state, emits a coherent photon.

What is a Stimulated Emission?

500

A type of radioactive decay in which an atomic nucleus emits an alpha particle (helium nucleus) and thereby transforms or 'decays' into an atom with a mass number that is reduced by four and an atomic number that is reduced by two.

What is Alpha Decay?
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