Examples and Descriptions test #3

Question 1

Phases of the Big Bang?

Answer 1

1. Big Bang Era
2. Planck Era
3. Grand Unification Era
4. Inflatiation Era
5. Electroweak Era
6. Heavy Particle Era
7. Light Particle Era
8. Nucleosynthis Era
9. Recombination Era
10. Galaxy Formation Era
11. Now

Question 2

Misconceptions associated with the Big Bang?

Answer 2

• Explosion
• Singularity (fireball apearing out of the nowherec in space)
• Explanation
• No evidence (Hubble’s Law)

Question 3

Evidence supporting the Big Bang?

Answer 3

• Hubble’s law (that other galaxies are being redshifted, moving away from us)
• CMBR [cosmic microwave background radiation] (the amount of heat left over from B.B.)
• Quasars (large galactic cores that emit large amounts of energy)
• Radioactive decay (radi. elements that decay at constant rates)
• Stellar evolution (view stars form,burn, and explode)
• Speed of light (300,000 km/s,

Question 4

Poroperties of stars?

Answer 4

• distance (stellar parallax, used for measuring the distance to a star, light year is often used)
• Stellar brightness (size,temperature,and distance, Dim stars = large number
  Bright stars = small numbers)
• Color and temperature (hot star=blue, colol star=red, neutral star?=yellow)

Question 5

What is the life cycle of a star?

Answer 5

1- Birth:
formed from a nebula, becomes protostar. (temp. rises)
2- Protostar
enrergy is released, outward pressure increases, star becomes stable.
(main sequence)
3- Main sequence stage
90% of a star’s life is spent as one, bigger stars live for smaller ammounts, small stars use fuel slower than larger ones.
4- Red Giant stage
stars outer layer expands, core collapses
(star dies)

Question 6

How do stars synthesize elements up through iron?

Answer 6

Through the fusion process, first they fuse hydrogen to helium, etc.. until the fusion in the star’s core leads up to iron.

Question 7

What are the forms of electromagnetic radiation?

Answer 7

Visible Spectrum
Radio
Micorwave 
Infared 
Gamma Ray 
EMR
Ultra Violet

Question 8

Different types of galaxies?

Answer 8

Spiral galaxies, lenticular galaxies, elliptical galaxies, and irregular galaxies.