Glossary_1-7 - GLOSSARY FOR LECTURE 01 Anthropogenic Caused...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
GLOSSARY FOR LECTURE 01 Anthropogenic – Caused by humans, as air pollution. Ozone Depletion – Reduction of ozone (O 3 ) concentration in the ozone layer. Plate Tectonics - Theory that accounts for many observed geological phenomena that result from the movement of tectonic plates.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
GLOSSARY FOR LECTURE 02 Big Bang Theory - The leading scientific explanation of the universe’s earliest history. The theory supposes that the universe began in an extremely hot and dense state, and that it has been expanding and cooling ever since. Core – The central portion of a celestial body; innermost layer of Earth, consisting of a solid inner core and a liquid outer core. Crust – Thin, outermost portion of Earth; outermost rocky units of Earth usually divided into two types: a thinner, oceanic (basaltic) crust and a thicker, continental (granitic) crust. Density – The mass per unit volume of a substance commonly expresses in grams per cubic centimeters. Fusion - Process by which atoms combine to make heavier elements; the process by which the sun produces its energy Fractionation – Separation of a substance into two or more parts on the basis of physical or chemical properties. Galaxy - System or aggregation of stars, dust clouds, and cold dark matter, aggregations of billions of stars. Jovian planets – The four, mostly gaseous, giant outer planets of the Solar System: Jupiter, Saturn, Uranus, and Neptune. Mantle – Spherical rocky layer of Earth that lies between the crust and outer core, Nebula - Giant cloud of gas and dust that provides the material from which stars coalesce. Nucleosynthesis - The process by which the elements are built up from protons and neutrons. Planetesimal - Term used to describe small bodies that are accreted to form the Earth and other planets. Protoplanet – A slowly growing aggregate of planetesimals colliding and coalescing into a planet under the force of gravity. Protosun - A large cloud of dust and gas gradually coalescing into a star under the force of gravity.
Background image of page 2
– The spontaneous emission of particles or energy from nuclei that are inherently unstable. Solar Nebula theory - Account of the formation of the Solar System in which a large nebula condensed to form the sun and its attendant bodies. Solar system - The sun, the nine planets, the moons orbiting the planets, and all other bodies subject to the sun’s gravitational influence: That is, comets, asteroids, and debris such as interplanetary dust. Solar wind - Charged particles that exit the sun at high speed: corpuscular radiation. Supernova - An explosive stellar event during which most of the mass of a large star is expelled at a high speed; a stellar explosion triggered by a rapid collapse of a massive star; the brilliant light given off by an exploding star. Terrestrial planets
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 13

Glossary_1-7 - GLOSSARY FOR LECTURE 01 Anthropogenic Caused...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online