CK12 Earth Science

(Marvins-Underground-K-12) #1

Vocabulary


catadioptric telescope Telescopes that use a combination of mirrors and lenses to focus
light.


constellations Patterns of stars as observed from Earth.


electromagnetic radiation Energy transmitted through space as a wave.


electromagnetic spectrum The full range of electromagnetic radiation.


frequency The number of wavelengths that pass a given point every second.


gamma rays A penetrating form of electromagnetic radiation.


infrared light Electromagnetic waves with frequencies between radio waves and red light;
about 1 mm to 750 nanometers.


light-year The distance light can travel in one year; 9.5 trillion kilometers.


microwaves The shortest wavelength radio waves.


planets Around celestial object orbiting a star that has cleared its neighboring region of
planetesimals.


radio telescope A radio antenna that collects radio waves.


radio waves Thelongestwavelengthsoftheelectromagneticspectrum; from1mmtomore
than thousands of kilometers.


reflecting telescope Telescopes that use mirrors to collect and focus light.

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