# Scientific Laws & Theories

Flashcards by Selam H, updated more than 1 year ago
 Created by Selam H over 7 years ago
589
21

### Description

Many of the theories and laws in science.

## Resource summary

 Question Answer The Big Bang Theory (Astronomy) Theory that the beginning of the universe began 14 billion and in an instant there was an enormous explosion that expanded the universe in all directions. 1st Law of Motion (Physics) (The Law of Inertia) An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. 2nd Law of Motion (Physics) $Force = Mass·Acceleration$ 3rd Law of Motion (Physics) For every action there is an equal but opposite reaction. 1st Law of Thermodynamics (Energy) Energy must be conserved; if energy is added to a system, it can either increase the thermal energy or do work on the system. 2nd Law of Thermodynamics (Energy) Heat can only flow from where there it is abundant to where it is less. (hot → cold) It can only flow from cold → hot if work is done. 3rd Law of Thermodynamics (Energy) It is impossible to reach absolute zero (0 K=-273.15 °C=−459.67 °F); this is because if an object reaches absolute zero, it's atoms will stop moving (no heat.) Law of Reflection (Physics) Image: Picture1 (image/png) Einstein's Theory of Relativity (Physics) The theory that space and time are relative (or related) concepts rather than absolute concepts. Newton's Law of Universal Gravitation (Astronomy, Physics) Any two bodies in the universe attract each other with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. Hubble's Law of Cosmic Expansion (Astronomy) There are other galaxies besides the Milky Way and these galaxies were zipping away from our own, a motion he called recession. $Velocity = H_0 × Distance$ Kepler's 1st Law of Planetary Motion (Astronomy) (Law of Orbits) Planets orbit the sun elliptically. Kepler's 2nd Law of Planetary Motion (Astronomy) (Law of Area) A line connecting a planet to the sun covers an equal area over equal periods of time. Pascal's Law Law concerning pressure applied to fluid: the principle that pressure applied to a confined fluid is transmitted uniformly in all directions. Universal Law of Gravitation (Physics) Any two objects, no matter their mass, exert gravitational force toward one another. $F = G\frac{m_1m_2}{r^2}$ Archimedes' Buoyancy Principle (Physics) The apparent upward force (buoyancy) of a body immersed in a fluid is equal to the weight of the displaced fluid. Kepler's 3rd Law of Planetary Motion (Astronomy) (Law of Periods) It allows us to establish a clear relationship between a planet's orbital period and its distance from the sun. Thanks to this law, we know that a planet relatively close to the sun, like Venus, has a far briefer orbital period than a distant planet, such as Neptune. Evolution and Natural Selection (Life) In order to produce the immense amount of difference among all living organisms, certain ones had to evolve into distinct species. The traits given to certain animals were naturally selected to help that animal survive. Heisenberg's Uncertainty Principle (Chemistry) You can know the position of an electron with a high degree of certainty, but not its momentum and vice versa.

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