Heredity
Astronomy
Earth's changing system
atmosphere and weather
chemistry
100

A pedigree, as related to genetics, is a chart that diagrams the inheritance of a trait or health condition through generations of a family.

Pedigrees

100

The Tropic of Capricorn is the circle of latitude that contains the subsolar point at the December solstice. It is thus the southernmost latitude where the Sun can be seen directly overhead. It also reaches 90 degrees below the horizon at solar midnight on the June Solstice.

Tropic of Capricorn

100

Continental drift is the hypothesis, originating in the early 20th century, that Earth's continents move or drift relative to each other over geologic time.

Continental Drift

100

A tropical cyclone is a rapidly rotating storm system characterized by a low-pressure center, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain and squalls.

Hurricanes

100

A period is a horizontal row of the periodic table. There are seven periods in the periodic table, with each one beginning at the far left. A new period begins when a new principal energy level begins filling with electrons. Period 1 has only two elements (hydrogen and helium), while periods 2 and 3 have 8 elements.

Periods

200

Supercells are storms --- usually, but not necessarily, thunderstorms --- that contain updrafts that rotate about a vertical axis.

Supercell thunderstorm

200

sexual reproduction, the production of new organisms by the combination of genetic information of two individuals of different sexes.

Sexual reproduction

200

Asexual reproduction is a mode of reproduction in which a new offspring is produced by a single parent.

Asexual reproduction

200

A genus is a class or group of something. In biology, it's a taxonomic group covering more than one species.

Genus

200

the unusually rapid increase in Earth's average surface temperature over the past century primarily due to the greenhouse gases released as people burn fossil fuels.

Global warming

300

the region of space surrounding a body, such as a charged particle or a magnet, within which it can exert a force on another similar body not in contact with it.

Force field

300

An elliptical galaxy is a type of galaxy with an approximately ellipsoidal shape and a smooth, nearly featureless image. They are one of the four main classes of galaxy described by Edwin Hubble in his Hubble sequence and 1936 work The Realm of the Nebulae, along with spiral and lenticular galaxies.

Elliptical Galaxy

300

the property of a body that is a measure of its inertia and that is commonly taken as a measure of the amount of material it contains and causes it to have weight in a gravitational field.

Mass

300

Nuclear energy is a form of energy released from the nucleus, the core of atoms, made up of protons and neutrons.

Nuclear energy

300

In genetics, dominance is the phenomenon of one variant of a gene on a chromosome masking or overriding the effect of a different variant of the same gene on the other copy of the chromosome. The first variant is termed dominant and the second is called recessive.

Dominant

400

In a chemical reaction, chemical equilibrium is the state in which both the reactants and products are present in concentrations which have no further tendency to change with time, so that there is no observable change in the properties of the system.

Equilibrium

400

Newton's First Law of Motion (Inertia) An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force.

Newton's First Law

400

Newton's second law states that the acceleration of an object is directly related to the net force and inversely related to its mass. Acceleration of an object depends on two things, force and mass. This shows that the bowling experiences a much greater force. But because of the big mass, it resists acceleration more.

Newton's Second Law

400

Newton's Third Law: Action & ReactionHis third law states that for every action (force) in nature there is an equal and opposite reaction. If object A exerts a force on object B, object B also exerts an equal and opposite force on object A.

Newton's third law

400

extending in the direction of the length of a thing; running lengthwise. a thin, longitudinal stripe. 3. Zoology. pertaining to or extending along the long axis of the body, or the direction from front to back, or head to tail.

Longitudinal

500

What is the Universal Law of Gravitation? Newton's Law of Universal Gravitation states that every particle attracts every other particle in the universe with force directly proportional to the product of the masses and inversely proportional to the square of the distance between them.

Universal Law of Gravity

500

Electromagnetism is the physical interaction among electric charges, magnetic moments, and electromagnetic fields. An electromagnetic field can be static, slowly changing, or form waves. Electromagnetic waves are generally known as light and obey the laws of optics.

Electromagnetism

500

Gravitational acceleration is described as the object receiving an acceleration due to the force of gravity acting on it. It is represented by 'g' and its unit is m/s2. Gravitational acceleration is a quantity of vector, that is it has both magnitude and direction.

Gravitational Accel

500

In simple terms, sound energy comes from vibrations moving through something. Solids, liquids, and gases all transmit sound as energy waves. Sound energy is the result when a force, either sound or pressure, makes an object or substance vibrate.

Sound energy

500

Kinetic energy is the energy an object has because of its motion. If we want to accelerate an object, then we must apply a force. Applying a force requires us to do work. After work has been done, energy has been transferred to the object, and the object will be moving with a new constant speed.

Kinetic Energy

M
e
n
u