Big Bang Flashcards
Kinetic theory of matter
- All matter is made of small particles
- The particles are always in motion
- As heat energy is added, the particles move faster
Endothermic
Heat is absorbed
- evaporation
- melting
Exothermic
Heat is released
- condensation
- freezing
Physical properties
Melting point, freezing point, solubility, color, density
Chemical properties
Reactivity, flammability
Physical changes
Change of state; dissolving
Chemical changes
Any time a chemical reaction happens
Mechanical
Sound wave; must travel through a medium move fastest through solids; slowest through gases
Non-mechanical
Electromagnetic waves (light, radio, microwaves)
Electromagnetic spectrum
Know the 7 types of waves on the spectrum:
Radio waves -> Microwaves -> Infrared radiation -> Visible light -> ultraviolet -> X rays. -> Gamma rays
Temperature
- ) Average kinetic energy of particles in an object (higher energy=higher temperature)
- ) boiling/freezing points on the different temp scales
Absolute zero
Temperature at which particle motion STOPS
Key pieces of Big Bang theory are:
- ) Doppler effect (red shift - galaxies seem to be moving away from us)
- ) Background cosmic radiation
- ) Hubble’s law- the farther away the galaxy from earth, the faster it is moving
Distance
A measure of the total length an object travels
*basic unit is meters
Speed
Distance traveled in a certain amount of time (S = d/t)
