Check my answers pls giving brainliest to who answers correctly
this is due !

1. locate the sun on the hr diagram. the best way to describe the sun in comparison to other stars would be *

brighter than most stars.
average brightness compared to most stars. ***
dimmer than most stars.

2. sirius b was an important star in ancient egypt and was used to warn for floods on the nile river. is sirius b brighter or dimmer than the sun? *

brighter
dimmer ***

3. betelgeuse is a red, giant star that guided caravans across the deserts of arabia in the coolness of night. betelgeuse is considered a *

hot star.
cooler star. ***

4. a white dwarf star has a surface temperature of about degrees celsius. *

3,000
5,000 to 10,000 ***
20,000 to 50,000

5. magnitude means brightness. absolute magnitude tells us how bright a star is. what is the brightness of a blue star in the upper left corner of your h-r diagram? *

20 to 15
10 to 5
0 to -5
-15 to -20 ***

6. what is the brightness of a red star in the lower right corner? *

20 to 15 ***
10 to 5
0 to -5
-15 to -20

7. what is the brightness of the sun, a yellow star? *

- 20
-10
5 ***
15

8. the super giant stars in the upper right corner are very bright. their brightness is *

20 to 15
10 to 5
0 to -5
-10 to -20 ***

9. a bright star will have a negative number for its absolute magnitude (brightness). *

true
false

10. the apparent magnitude of stars is how bright they look to us. we are on the earth looking up into space. which would look brighter? *
1 point
small star ***
big star

11. which would look brighter? *
1 point
close star ***
far away star

12. stars that are not very hot (cooler) but very bright are called *

giants ***
dwarfs

13. stars that are very hot, but not very bright are called *

giants
dwarfs ***

14.giants and dwarfs are believed to be stars. *

old ***
young

15. what size star is the sun? *

white dwarf
medium main sequence ***
giant
supergiant

16. with the use of the hubble space telescope, scientists recently discovered a giant runaway star. it is 90 times larger than the sun and is very hot and blue-white in color. why does the sun appear to be brighter than this runaway star when viewed from earth? *

the sun is a different color than the runaway star.
the sun is older than the runaway star.
the sun is closer to earth than the runaway star. ***
the sun is made of different elements than the runaway star.

17. the hertzsprung-russell diagram below shows how the sun is classified among the stars. a star that is several thousand times brighter than the sun with a temperature lower than 4,000 k would be classified as *

a main-sequence star in spectral class b
a supergiant in spectral class k
a main-sequence star in spectral class k or m
a white dwarf in spectral class b

18. two stars are identified on the hertzsprung-russell diagram. based on the diagram below, how do the characteristics of star 1 and star 2 compare? *

star 1 is cooler and less bright than star 2.
star 1 is hotter and brighter than star 2.
star 1 is cooler and brighter than star 2.
star 1 is hotter and less bright than star 2.

19. a hertzsprung-russell diagram is shown below. based on this diagram, which type of stars would belong to spectral class m and have the highest luminosity? *

white dwarfs
main-sequence stars
giants
supergiants

20. barnard’s star is about 5.9 light-years from the sun. the star has an approximate temperature of 2,800 k. based on the diagram below, what spectral class does barnard’s star belong to? *

spectral class o
spectral class b
spectral class a
spectral class m