explain how the ideas of the solar system and universe have changed over time.

The various models discussed

Consider the lab we did in class. What elements are the most abundant in the Universe?

What is the percentage of each one?

Hydrogen Helium and

Using what we learned about the eras of the Big Bang, what does the theory predict about the evolution of matter and materials in the universe? Consider what formed first in terms of complexity.

What types of elements (simple or complex) would you predict to have formed in the early universe?

Why would the composition of NEW stars begin with hydrogen?

Explain what Big Bang Theory predicts about the average motion in the universe?

What is Redshift and what does it tell us about the motion in the universe?

Be able to use absorption spectral patterns to determine if galaxies are moving towards Earth or away, and what the relative speed of those galaxies are.

What is Hubble’s Law?

What happens to the velocity of objects in space as the distance between them increases?

13. Be able to perform a couple of calculations using Hubble’s Law v=Hd

14. Be able to calculate the amount of redshift (using nanometer measurements) to compare

Differences in galaxy velocities.

15. Given: The reference absorption spectra has an absorption line at 647nm. Calculate the

amount of redshift for each of the following galaxies using the absorption spectra values

provided. Red spectra continues towards 700nm and blue shift towards 500nm

A. Galaxy Z 639nm

B. Galaxy G 656nm

C. Galaxy M 649nm

D. Galaxy X 661nm

16. Put the galaxies above in order, listing any moving away first, then go in order from closest

to furthest away.

17. Given the wavelength for an element on Earth AND from a distant galaxy, determine the

Velocity of that galaxy.

( ƛEarth - Galaxy ) v

=

ƛEarth C

C = the speed of Light, 3 X 108

ƛ Earth = 476nm

ƛ Galaxy = 527nm

How fast is the galaxy moving? Is it moving towards Earth or Away from Earth?