Tag: the big bang and the early development of the universe

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Multiple choice social science universe and space the big bang and the early development of the universe origin of universe evolution of the universe

State whether true or false :
When Meteor enters the atmosphere of the earth, it gets heated due to friction of the air.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When a meteoroid enters Earth's atmosphere, it travels at high speeds. The friction with atmospheric gases generates intense heat, causing the object to glow and often vaporize, which we see as a shooting star.

Multiple choice social science universe and space the big bang and the early development of the universe origin of universe evolution of the universe

There are two ways to measure the brightness of a star; the apparent magnitude of the brightness of the star is the brightness seen from the earth and absolute magnitude of the brightness of the star which is the brightness of a star seen from the standard distance of ___________.

  1. $10$ parsec
  2. $32.6$ light years
  3. $3.26$ light years

  4. both (a) and (b)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Absolute magnitude is defined as the apparent magnitude a star would have if it were at a distance of 10 parsecs from Earth. Since 1 parsec is approximately 3.26 light-years, 10 parsecs is equal to 32.6 light-years.