ESS
Grade-9
Easy
Question
CBR is___________.
- Cosmic black radiation
- Cosmic back radiator
- Cosmic background radiation
- Cosmic Blue radiation
Hint:
Cosmic Background radiation.
The correct answer is: Cosmic background radiation
CBR is Cosmic background radiation which is electromagnetic radiation from the Big Bang.
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Which of the following theory states that an explosion created the universe?
Which of the following theory states that an explosion created the universe?
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Hydrogen burning is the major energy source for main-sequence stars because_______.
Hydrogen burning is the major energy source for main-sequence stars because_______.
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Most of the visible stars are __________.
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In order to start nuclear fusion, a high temperature is necessary in the center of a star to overcome the __________.
In order to start nuclear fusion, a high temperature is necessary in the center of a star to overcome the __________.
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When a white dwarf cools completely, what will happen?
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_______ has the coolest surface temperature?
_______ has the coolest surface temperature?
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Observe the given image of various types of stars and select the CORRECT option of star type, color, and surface temperature.
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Which of the following is the general rule for main sequence stars?
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What is Light Year is defined as the _________.
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Stars of similar temperatures but different sizes will have:
Stars of similar temperatures but different sizes will have:
ESSGrade-9
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Star A = Red star and Star B = Blue star. Which one is hotter?
Star A = Red star and Star B = Blue star. Which one is hotter?
ESSGrade-9
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Which is the one property of a main-sequence star that determines all its other properties?
Which is the one property of a main-sequence star that determines all its other properties?
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The CORRECT order of the stellar spectral sequence from the hottest to the coolest stars is _____________.
The CORRECT order of the stellar spectral sequence from the hottest to the coolest stars is _____________.
ESSGrade-9
