Class lecture notes Flashcards
(55 cards)
Heliocentric Universe
Sun Centered
Geocentric Universe
Earth Centered
Occam’s Razor
The simple explanation is usually the right one
What are Waves?
Disturbances that transmit energy
What is a Wavelength?
Distance between 2 crests or trough
What’s the Doppler Effect?
An ambulance moving towards you has higher pitch than after it passes you
Electromagnetic Spectrum
Colors visible to the human eye. 99.9% is not visible.
What is Red Light
Low frequency=long wavelength
What is Blue light
High Frequency=Short wavelength
What is a Red Shift
Light source moving away an observer appears redder
What is a Blue shift
Light source moving towards an observer appears bluer
What was the Big Bang
All matter and energy compressed to a single point and then exploded to form the universe
What is a Atom
Smallest building block of all matter. Made up of electrons, protons, and neutrons.
Atomic number
Number of protons in the nucleus
Atomic mass
Protons + Neutrons
What is an Isotope
Element with the same number of protons and electrons but a different number of neutrons
Nuclear fission
Splitting of an atom to release energy
Nuclear fusion
Atomic nuclei combine to produce a new element and a lot of energy
STELLAR Nucleosynthesis
Nuclear fusion within stars to form new elements
SUPERNOVA Nucleosynthesis
When a star dies it produces heavier elements
What is the Oort cloud
Region of icy objects that exist beyond the outmost reaches of the solar system
What’s a Heliosphere
Bubble of plasma and magnetic fields
Kuiper belt
Comets originate from the belt with Neptune’s orbit being the inner edge
What does Neptune’s orbit define?
Defines interplanetary space