Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Astronomy Eng
| Term | Definition |
|---|---|
| Universe began | approximately 15 billion years ago |
| Big bang theory | gravity pulled together particles until the mass was so big it exploded |
| Planet formation | clumping and gravity of particles exploded during the big bang eventually formed planets |
| The universe is | expanding, all of the galaxies |
| Galaxy | Collection of solar systems |
| Solar system | Collection of planets/celestial bodies orbiting a star(s) |
| Our galaxy | the milky way (spiral shape) |
| The asteroid belt is between | Mars and Jupiter |
| The kuiper belt is between | Neptune and outer dwarf planets |
| The sun is | at the center of our solar system, and is the closest star to us |
| Coronal mass ejection (CME) | large expulsions of plasma and magnetic field from the Sun's corona |
| Sun spots | Cooler area's on the surface of the sun caused by disturbances in the Sun's magnetic field |
| Solar cycle | Every 11 years the Sun's magnetic poles flip, causing increased magnetic field disturbances |
| Earth's magnetic field | protects us from solar radiation and emissions |
| Electromagnetic spectrum represents | Energy emitted from the sun |
| Higher frequency light waves have __ energy | more |
| Lower frequency light waves have ___ energy | less |
| Lightwaves frequency | the number of light waves that pass a point within 1 second |
| Wavelength | the distance between wave peaks |
| Amplitude | the height of a wave, higher amplitude is higher strength |
| Longer wave lengths move | slower |
| Shorter wave lengths move | faster |
| Higher frequency light waves have a __ wavelength | shorter |
| Lower frequency light waves have a __ wavelength | longer |
| Infrared light is experienced as | heat |
| Ozone layer (atmosphere) protects us from | UV light |
| Visible light | the only part of the electromagnetic spectrum that the human eye can see |
| Dopple effect | apparent change in frequency (speed) of sound or light as an object moves towards or away from an observer |
| Element fingerprint | Electromagnetic wavelength that absorbs a specific element |
| Blue shift | Object moving towards the observer appears to increase in frequency, decrease in wavelength |
| Red shift | Object moving towards the observer appears to decrease in frequency, increase in wavelength |
| Evidence supporting big bang theory | Red shift and cosmic background radiation both support that the universe is expanding and has always been expanding since the initial big bang |
| Hubble's law | the distance a galaxy or star is from the Earth is proportional to the speed at which it is moving |
| Geocentric model | Earth is the center of the solar system (old theory) |
| Heliocentric model | Sun is at the center of the solar system (current theory) |
Created by:
Ms. Torres
Popular Earth Science sets