Chapter 2 Flashcards
(29 cards)
Speed of Light
Approx. 300,000 kmps, or 186,000 mps
Perihelion
Closest to Sun on January 3rd
Aphelion
Farthest from Sun on July 4th
Earth’s orbit is…
Elliptical
Revolution
The movement of the Earth in its orbit around the Sun (365.25 days)
Two properties that drive weather and climate…
Revolution and rotation
Plane of the Ecliptic
The plane (flat surface) of Earth’s orbit
Two primary outputs from the sun are…
Solar wind and radiant energy
Solar Wind
Stream of electrically charged material that is emitted form the sun. Takes approx. 3 days to each Earth.
Sunspots
Surface disturbances on the sun that are caused by magnetic storms.
Charged solar wind particles are deflected by…
The magnetosphere
Aurora Borealis
Northern lights
Aurora Australis
Southern lights
Essential to life on Earth
Radiant Energy
Radiant Energy travels in…
Waves
Frequency
The number of waves passing a fixed point in 1 second
What percentage of emitted radiant energy from the sun comes in the for of visible light and infrared wavelengths?
92%
The hotter the object…
The shorter the wavelength, the higher the energy
Earth radiates energy in…
The longer wavelengths
The sun radiates energy in…
The shorter wavelengths
The range for visible light is…
0.4 to 0.7 micrometers
Violet wavelength
0.400 *shortest!
Blue wavelength
0.424
Green wavelength
0.491
