Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
24 Cards in this Set
- Front
- Back
|
Claudius PTolemy |
150 A.D. wrote atlas of world, made world too small, gave Columbus the idea |
|
|
Geocentric |
Earth the center of the universe |
|
|
Heliocentric |
sun centered, explained epicycles |
|
|
Tycho Brahe |
best observers, made best skymaps |
|
|
Kepler |
hired by Tycho for data, planets didn't move in perfect circles; ellipses |
|
|
Kepler Laws |
Planets orbit the sun in elliptical orbits The closer to Sun, faster orbit Period2 = Distance3 |
|
|
Newtons Law of Motion |
Inertia - stays in motion unless acted upon F=ma every action equal opposite reactive |
|
|
Law of Gravity |
F = Gm1m2 r2 |
|
|
Orbit |
Falling around the Earth |
|
|
Edmund Halley |
discovered comets orbit around Sun |
|
|
William & Caroline Herschel |
discovered Uranus |
|
|
Adams & Leverrier |
discovered Neptune 1846 |
|
|
Clyde |
discovered Pluto 1930 |
|
|
Brown |
discovered Eris 2003 |
|
|
Atomic Number |
# of protons, defines the element |
|
|
Atomic Mass |
# of protons + neutrons |
|
|
Atom |
smallest division of an element |
|
|
Protons |
Positive, nucleus |
|
|
Electrons |
Negative, around nucleus |
|
|
Neutrons |
neutral, with protons in nucleus |
|
|
Electromagnetism |
force behind charged particles, chemical activity, electricity, magnetism, light |
|
|
Strong Nuclear Force |
keeps nucleus of atoms from flying apart; limited range |
|
|
Weak Nuclear Force |
radioactivity, neutrinos |
|
|
Gravitation |
attractive force between all particles of matter, weakest of forces; unlimited range |
