Mid Term Exam 2021 Flashcards
What is the distance in length between 2 peak waves?
Wavelength
What is the range of light waves that expend from the wavelength of radio waves to gamma rays?
Electromagnetic Spectrum
What is the range of light waves that we can SEE?
Visible
What is the number of times larger an object appears through a telescope compared to the naked eye?
Magnification
What is the measure of the clarity of images?
Resolution
What is the spectrum produced from a hot gas?
Emission line spectrum
What color is the hottest star?
Blue
What do we call the lens that is thicker in the middle and bends light to a focal point?
Convex
What is it called when man made light reduces the visibility of stars?
Light pollution
What is known as the rebounding of light off of a smooth surface?
Reflection
The process in which our solar system was formed from a cloud of gas and dust is called what?
Accertion
The planets that are close to the sun, mostly rock, and have a high density are called what?
Rocky planets
What planet use to be a planet but isn’t anymore?
Pluto
Where are most asteroids located?
Asteroid belt
What are the evidence of collisions of objects into planets and moons?
Impact craters
What are the smaller objects that are less than 100km across that collided and formed in the planets of our solar system?
Planetesimals
What do we call the giant spherical shell surrounding the rest of the solar system?
Oort Cloud
What do we call the planets that are far from the sun, mostly gas, and have a low density?
Gas giants
What do we call it when a solid object is heated and changes color and give off light?
Black body Radiation
The spectrum produced when visible light passes through a cloud of cool gas in front of a continuous source of light?
Absorption line spectrum
What is the measure of the amount of light collected by a telescope?
Brightness
What is the effect that will change the wave length (light or sound) due to the motion of the source?
Doppler Effect
What do we call the number of wave peaks (crests) that pass a certain point in a period of time that is measured in hertz?
Frequency
This is caused by a star moving away from the observer.
Redshift
What is the height of waves called? (How tall the waves are)
Amplitude
What is the color of the coolest stars?
Red
This is caused when a star is moving toward the observer.
Blue shift
When the build up of sound waves reach a person, what does it create?
Sonic Boom
What do we call the bending of light as it passes through an object? (I.E. lens)
Refraction
The simple rule that gives us the distance of the planets from the sun.
Bode’s Law
What else besides asteroids are left over debris from the formation of the solar system?
Comets
What is known as a huge cloud of star dust?
Solar Nebula
What is the small rocky debris that people see in the solar system before they hit the surface of the earth?
Meteors
What is a donut shaped region of icy bodies beyond the orbit of Neptune?
Kuiper Belt
The gas that is collected in the center of the accretion disc.
Protosun
What is the space debris that lands on the earths surface intact?
Meteors
What creates a spectra?
Prism, Raindrops, CD’s
What happens when things get hotter?
The color changes, The wavelengths shorten
What do the redshift and blueshift of a star tell us?
Velocity
What do we call a telescope that has 2 lenses?
Refraction telescope
What increases in a telescope with long focal length?
Magnification
What makes stars twinkle?
Turbulence of the atmosphere
What do the waves do when a boat moves faster?
Compress
What does black body radiation tell us about the stars?
Temperature
What do we use to study naturally occurring radio light from stars, galaxies, black holes, and other astronomical objects?
Radio telescopes
When would you use an optical telescope?
To monitor temperature
What do we call the distance between the lens and the focal point?
Focal length
Why is it difficult to see stars in the city?
Light pollution
What happens when the boat or plane moves faster than the waves it produces and forms a V shape?
the waves overlap
Increasing the telescopes diameter will increase what?
Magnification
What are the 2 parts of the electromagnetic spectrum that makes it to the earth’s surface?
Visible light and radio waves
Why is the Hubble space telescope better than the ones on earth?
The light does not pass through the atmosphere
What can you tell me about the planets of the solar system?
Planets orbit in the same direction, Orbit in nearly the same plane, Most rotate in the same direction.
Why did Pluto get kicked out of the planet club?
It is mostly make of gas
Why are the inner planets made of mostly rock and the inner planets mostly made of gas?
The solar wind from the start of fusion when our star was born pushed lighter material out further.
Why do we see shooting stars?
Friction causing the rocks to heat up and burn
What is the source of most of the comets in the universe?
Oort Cloud
What does Bode’s law predict?
That there should be a planet between Jupiter and Mars
What are found between Jupiter and Mars?
Asteroids
Why is our sun considered a 2nd generation star?
Because the solar system is made up of all the elements in the periodic table
Why did the dinosaurs go extinct?
Due to the impact of an asteroid
What is the region of leftovers from the solar systems early history?
Oort Cloud
