10/27/14Aim: How did the Universe

Originate?

Do Now: 1. What is the Universe?2. How did the Universe originate?

HW. R&H pp. 38-39, A&E #1-6

Parts of the Universe1. Galaxies – collections of billions of stars in a

formation, includes planets, moons, asteroids and meteors

2. Solar Systems- A single star with planets, moons and asteroids orbiting it.

3. Star- a ball of gas that creates nuclear reactions allowing it to shine.

4. Planet- a rocky or gaseous body orbiting a star that may have moons orbiting it.

5. Moon- a rocky body that orbits a planet.

Fusion vs. Fission – a way to transform energy

Fusion- takes place in stars when light hydrogen atoms fuse together to form heavy helium atoms and in the process give off tremendous amounts of electromagnetic energy.

Fission- happens inside planets when heavier elements split to form lighter ones and in the process gives off energy in the form of radiation and heat. Also called nuclear decay or geothermal energy.

Doppler EffectWhen viewing distant objects the way

the wavelengths shift

Red Shift- when objects are moving away from an observer they spread out, creating longer wavelengths, and move towards the red end of the spectrum.

Blue Shift when objects are moving towards an observer they bunch up causing the wavelengths to decrease and move towards the blue end of spectrum. “Blue towards you”

* A red shift when viewing distant galaxies is evidence for an expanding universe.

** Background microwave radiation detected in space is left over from the Big Bang and is thought to be evidence for that theory.

10-28-14Aim: What is the life cycle

of a star?Do Now:1. What evidence do we have of the big bang?2. What process allows a star to produce its own

energy? Describe it.

HW R&H pp. 40-44, A&E #7-23

Life Cycle of a Star

Milky Way Galaxy – a Spiral Galaxy. Our sun is located about 2/3 of the way out on

the Orion arm.

The Milky Way A spiral galaxy side view

11-1-10Topic 3 Review

Do Now- Get out all HW from T.3Pick up a review sheet and complete.

HW – Study all of Topic 3 for exam tomorrow.

11-3-10Aim: Topic 3 Post Exam ReviewDo Now-1. As distance between foci increases, what

happens to eccentricity?2. As distance from the sun increases, what

happens to planet size, eccentricity, period of rotation, period of revolution?

HW – Finish test corrections.