Exercise, 8th Sci., 19. Life Cycle of Stars
ЁЯФЕ~~●●○○ ЁЯлР○○●●~~ ЁЯФЕ
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рдЖрдкрд▓्рдпा рд╡िрдЬ्рдЮाрди рд╡िрд╖рдпाрдЪ्рдпा рдоाрд╣िрддीрд╕ाрдаी рдЦाрд▓ीрд▓ ЁЯСЗ рд▓िंрдХрд▓ा ЁЯЦЗ️ рд╕्рдкрд░्рд╢ рдХрд░ा.
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- рдзрдб्рдпाрддीрд▓ рдЫोрдЯ्рдпा рдЫोрдЯ्рдпा рдШрдЯрдХांрдЪा рд╡िрдЪाрд░ рдХрд░ूрди рд╕्рд╡ाрдз्рдпाрдп рддрдпाрд░ рдХेрд▓ा рддрд░ рдзрдб्рдпाрдЪी рд╕ंрдкूрд░्рдг рддрдпाрд░ी рдЫाрди рд╣ोрддे. рдпाрд▓ाрдЪ рдЖрдкрдг рд╕ूрдХ्рд╖्рдоा рдХрдбूрди рдЕрдиंрддाрдХрдбे рдЕрд╕े рдо्рд╣рдгू.
- рд╕्рд╡ाрдз्рдпाрдп рд░िрдХाрдо्рдпा рдЬाрдЧा рдпा рд╕्рд╡рд░ूрдкाрддрдЪ рдХा? рдШेрдд рдЖрд╣ोрдд рддрд░ рдд्рдпा рд╡ाрдХ्рдпाрд╕ाрдаी рдпोрдЧ्рдп рд╢рдм्рдж рдо्рд╣рдгрдЬे рд░िрдХाрдоी рдЬाрдЧा.
- рдкрд░्рдпाрдп рдХा рджेрдд рдиाрд╣ी, рдкрд░्рдпाрдп рджिрд▓्рдпाрд╕ рдд्рдпा рдЪाрд░ рдкрд░्рдпाрдпांрдкैрдХी рдПрдХ рдЙрдд्рддрд░ рдЕрд╕рдгाрд░ рдЖрд╣े. рдо्рд╣рдгрдЬेрдЪ рдЖрдкрд▓्рдпाрд▓ा рдлрдХ्рдд рдд्рдпा рдЪाрд░ рд╢рдм्рджांрдЪाрдЪ рд╡िрдЪाрд░ рдХрд░ाрдпрдЪा рдЕрд╕рддो.
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1. The masses of other stars are measured with respect to the mass of the ... .
2. The different stages during the evolution of the star which is the path of evolution of the star, also depends on its mass.
3. What is a satellite?
4. A light year is the distance travelled by light in ... year.
5. A spoonful of white dwarf material weighs several...
6. With our unaided eyes, we can see roughly... stars at night.
7. Explain black holes.
8. The Sun's mass is roughly ... lakh times that of the Earth.
9. Describe a galaxy.
10. Scientists use the unit of ... year for measuring large distances.
11. Our galaxy contains roughly ... stars.
12. The weight of all living things on Earth is equal to one spoonful of material derived from ... stars.
13. List the three different kinds of galaxies.
14. According to the studies made by astromomers, sun properties will slowly change in further after ... billion years.
15. Our sun's surface temperature is... K.
16. Stars are born out of ... clouds.
17. What components make up our solar system?
18. Shape of our galaxy is like a disc with a bulge in the center, and its diameter is about ... km.
19. As the speed of light is ... km/s, the light year is equal to 9.5 x 1012 km.
20. The traditional Indian name for our spiral galaxy, the Milky Way, is....
21. Our Sun weighs ... kg.
22. In the Sun, energy is generated by the fusion of ... nuclei to form helium nuclei.
23. For measuring large distances... is used as a unit.
24. The sun is ... years old.
25. Which star is nearest to us?
26. The radius of sun is 100 times that of the earth.
27. The larger the mass of a star, the faster is its...
28. It takes 4.2 years to reach light from the star alpha Centauri which is the star closest to the Sun.
29. Our Sun's radius is ... km.
30. How do a star and a planet differ from one another?
31. Our galaxy's rotation period is approximately ... years.
32. Stars are spheres of ... gas.
33. Astronomers study the observations made by all these ... to obtain detailed information about the universe.
34. The sun's center has a temperature of... K.
35. The solar system is located ... kilometers away from the center of our galaxy.
36. The Sun's mass is composed of 72% hydrogen and 26% helium.
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рдХाрд╣ी рд╢рдм्рджांрдиा рдЧुрдЧрд▓ рд▓िंрдХ ЁЯЦЗ️ рдЖрд╣े.
ЁЯФЕ~~●●○○ ЁЯлР○○●●~~ ЁЯФЕ
рд▓ाрд▓ рд╢рдм्рдж рд╣े рдкुрд╕्рддрдХाрддीрд▓ рдЪुрдХाЁЯЩП рджрд░्рд╢рд╡рддाрдд.
┈┉┅━ ❍❀ЁЯФШ❀❍ ━┅┉┈
рдоाрдл рдХрд░ा рдХाрд╣ी рдоोрдЬрдХेрдЪ рдк्рд░рд╢्рди рджोрди рд╡ेрд│ेрд╕ рд╡िрдЪाрд░рд▓े рдЖрд╣ेрдд.
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