Physical science terms and definitions
Parallel Circuit A circuit in which an entering current divides proportionately among the circuit elements. Precession The slow rotation of the axis of spin of the Earth around an axis perpendicular to the ecliptic plane. Motion The changing of position.
Mks System The metric system that has the meter, kilogram, second, and coulomb as the standard units of length, mass, time, and electric charge, respectively. The particles in a gas are spread so far apart that the majority of the volume is empty space. Photoelectric Effect The emission of electrons that occurs when certain metals are exposed to light. If a particle has no charge, then the number of protons and electrons are equal. Moraine A ridge of glacial drift. Pangaea The giant supercontinent that is believed to have existed over million years ago. Molarity M A measure of solution concentration in terms of moles of solute per liter of solution. Original Horizontality, Principle Of The principle that sediments and lava flows are deposited as horizontal layers. Neutron Number N, the number of neutrons in the nucleus of an atom. Proton-Proton Chain A series of stellar nuclear reactions in which four hydrogen nuclei protons combine to form one helium nucleus and release energy. Mass Number The number of protons plus the number of neutrons in a nucleus; the total number of nucleons. They have an indefinite shape and volume. Paleontology The systematic study of fossils and prehistoric life forms.
In geology, an interval of geologic time that is a subdivision of an era and is made up of epochs. Molarity M A measure of solution concentration in terms of moles of solute per liter of solution.
Physical science vocabulary word list
Outer Core Part of the innermost region of the Earth, which is composed of two parts: a solid inner core and a molten, highly viscous outer core. Quantum Mechanics The branch of physics that replaced the classical-mechanical view that everything moved according to exact laws of nature with the concept of probability. Plutons Intrusive igneous rocks, formed below the surface of the Earth by solidification of magma. Moho Mohorovicic Discontinuity The boundary between the Earth? Mks System The metric system that has the meter, kilogram, second, and coulomb as the standard units of length, mass, time, and electric charge, respectively. Moraine A ridge of glacial drift. Neap Tides Moderate tides with the least variation between high and low. Prograde Motion Orbital or rotational motion in the forward direction. Psychrometer An instrument used to measure relative humidity. Magnitude Absolute The apparent magnitude that a star would have if it were placed 10 parsecs from the Earth. Proteins Long-chain polyamides formed by the enzyme-catalyzed condensation of amino acids. O Ohm O The unit of resistance; equal to one volt per ampere. During an eclipse, an observer in the penumbra sees only a partial eclipse.
The process takes place when the anion of the solute is attracted to the hydrogens in the water molecule and the cation of the solute is attracted to the oxygen in the water When potassium chloride dissociates in water, the potassium ion is attracted to the oxygen of the water molecule and the chloride is attracted to the hydrogens.
Matter De Broglie Waves The waves produced by moving particles.
Prograde Motion Orbital or rotational motion in the forward direction. Meteoroids Small, interplanetary objects in space before they encounter the Earth. Psychrometer An instrument used to measure relative humidity.
They have an indefinite shape and volume. The electrons occupy the electron cloud, which constitutes a majority of the atom's volume, and surrounds the nucleus. Nova A white dwarf star that suddenly increases dramatically in brightness for a brief period of time. Partial Lunar Eclipse The Earth?
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