E
Ellie W
Guest
According to the Hertzsprung-Russel Diagram, what is the luminosity of the Sun?
1
2
3
4
--------------------------------------------------------------------------------
What is the Sun's absolute magnitude?
+1
-4.83
+4.83
-1
--------------------------------------------------------------------------------
Main sequence stars are those that have fairly uniform composition and are fueled by the fusion of ___________ to form energy, given off as light and __________.
helium, hydrogen
hydrogen, helium
oxygen, hydrogen
oxygen, carbon monoxide
--------------------------------------------------------------------------------
What is the main factor that influences how long a star burns?
The mass of the star. Larger stars have shorter lifespans.
The mass of the star. Larger stars have longer lifespans.
How close the star is to other stars.
How close the star is to a black hole.
--------------------------------------------------------------------------------
About how fast are solar winds travelling when they pass Earth?
100 mph
1,000 mph
1,000,000 mph
1 mph
--------------------------------------------------------------------------------
Term Definition
1. Chromosphere A) central region where nuclear reactions consume hydrogen to form helium.
2. Core B) a dense cloud of material suspended above the surface of the Sun by loops of magnetic field.
3. Flares C) dark areas on the surface of the Sun. Temperatures here drop to about 3700 K (compared to 5700 K for the surrounding photosphere).
4. Prominence D) an irregular layer above the photosphere where the temperature rises from 6000° C to about 20,000° C.
5. Radiative zone E) tremendous explosions on the surface of the Sun. In a matter of just a few minutes they heat material to many millions of degrees and release as much energy as a billion megatons of TNT.
6. Sunspots F) energy generated in the core is carried by light (photons) that bounces from particle to particle through this zone.
7. Photosphere G) the Sun's outer atmosphere. It displays a variety of features including streamers, plumes, and loops and is visible during total eclipses of the Sun as a pearly white crown surrounding the Sun.
8. Corona H) the visible surface of the Sun that we are most familiar with.
1
2
3
4
--------------------------------------------------------------------------------
What is the Sun's absolute magnitude?
+1
-4.83
+4.83
-1
--------------------------------------------------------------------------------
Main sequence stars are those that have fairly uniform composition and are fueled by the fusion of ___________ to form energy, given off as light and __________.
helium, hydrogen
hydrogen, helium
oxygen, hydrogen
oxygen, carbon monoxide
--------------------------------------------------------------------------------
What is the main factor that influences how long a star burns?
The mass of the star. Larger stars have shorter lifespans.
The mass of the star. Larger stars have longer lifespans.
How close the star is to other stars.
How close the star is to a black hole.
--------------------------------------------------------------------------------
About how fast are solar winds travelling when they pass Earth?
100 mph
1,000 mph
1,000,000 mph
1 mph
--------------------------------------------------------------------------------
Term Definition
1. Chromosphere A) central region where nuclear reactions consume hydrogen to form helium.
2. Core B) a dense cloud of material suspended above the surface of the Sun by loops of magnetic field.
3. Flares C) dark areas on the surface of the Sun. Temperatures here drop to about 3700 K (compared to 5700 K for the surrounding photosphere).
4. Prominence D) an irregular layer above the photosphere where the temperature rises from 6000° C to about 20,000° C.
5. Radiative zone E) tremendous explosions on the surface of the Sun. In a matter of just a few minutes they heat material to many millions of degrees and release as much energy as a billion megatons of TNT.
6. Sunspots F) energy generated in the core is carried by light (photons) that bounces from particle to particle through this zone.
7. Photosphere G) the Sun's outer atmosphere. It displays a variety of features including streamers, plumes, and loops and is visible during total eclipses of the Sun as a pearly white crown surrounding the Sun.
8. Corona H) the visible surface of the Sun that we are most familiar with.