6)What is the name for a simple individual blob of stuff in space. It might be m

Question

6)What is the name for a simple individual blob of stuff in space. It might be made of gas, or dust, or both. Choose the one best answer. A) Dust cloud B) Nebula C) interstellar medium D) solar system E) galaxy 7) If we look through gas and dust in space toward a more distant star, how will the star’s apparent color be affected by the intervening dust? A) it will look darker, while the color will not change B) it will look darker, while the color will not change C) it will look redder D) it will look bluer E) it will look greener 8)Sometimes nature tries to make a star but it is too lightweight to become a star (less than 8% of the Sun’s mass). What would this failed star be called? A) Pre-main sequence star B) Brown dwarf C)Red dwarf D) Black dwarf 9)What type of radiation makes an emission nebula (“H II region”) hot and glowing? A) Radio-wave light B) infrared light C) normal visual light D) Ultraviolet light E) X-ray light 10)A helium flash is caused by unusual conditions that develop in what part of a star? A) The corona B)the convection zone C) the radiation zone D) the core E) the surface

Explanation / Answer

6) - B- Nebula

It is a cloud of dust and gas like hydrogen , helium and other ionized gases that occur in the interstellar space .

7) -C- It will look redder

Because the blue light is scattered easily due to the its shorter wavelength by interstellar dust than the longer wavelength( red light). The more the distance of the star more will it appear red.

8) - B- Brown dwarf

It is a calastial body which has insufficient mass to sustain hydrogen fusion reactions that produce energy like normal star.

9) -D -ultraviolet light

Emission nebula is a cloud of ionized gases which emits lights of different wavelengths.

10) -D - the core

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