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1. How would you describe the universe to someone not in our class?

2. What are the three major types of galaxies?

3. What is the force that holds galaxies together?

4. According to the reading, what do stars spend all of their time doing?

5. Describe in your own words the Big Bang theory.

6. Why do we see the colors that we see when we look around us?

7. Which type of visible light has the longest wavelengths?

8. Which type of visible light has the shortest wavelengths?

9. Name an example of where sound or light waves are stretched out or compressed.

10. Name and describe in your own words the first evidence of the Big Bang theory.

11. What kind of "shifting" do we see nearly everywhere we look in the universe?

12. Name and describe in your own words the second major evidence of the Big Bang theory.

13. Name and describe in your own words the third major evidence of the Big Bang theory.

14. How would you describe a heavy element to someone who doesn’t know what it is?

15. Where did the Earth get all of the heavy elements that it is made of?

16. What are the requirements of being a "main sequence" star?

17. What is the heaviest element that our sun will ever create?

18. What is the heaviest element that larger stars will ever create before they explode?

19. What do you call the violent collapse and explosion of large stars?

20. According to the packet, out of our entire universe, what is the most unique thing that we know about?

Answer :

Final answer:

The universe contains various galaxies held together by gravity, and the Big Bang theory explains its origin. We see colors due to the interaction of light with objects, and life is the most unique thing we know about in the universe. Stars, including the Sun, undergo nuclear fusion and can create heavy elements.

Explanation:

The universe can be described as an all-encompassing cosmos containing galaxies, stars, and planets. The three major types of galaxies are elliptical, spiral, and irregular. The force that holds galaxies together is gravity, which influences the motion of cosmic bodies. Stars primarily spend their time undergoing nuclear fusion, converting hydrogen into helium.

The Big Bang theory posits that the universe originated from a singularity and expanded into its current state. Colors we see are linked to the way light interacts with objects. Red light has the longest wavelengths whereas violet light has the shortest ones. A siren approaching and receding from us is an example of sound waves being stretched or compressed, known as the Doppler effect.

The redshift phenomenon, where celestial objects appear redder due to universal expansion, was the first evidence in support of the Big Bang theory. The other evidences are the distribution of light elements and cosmic microwave background radiation. A heavy element is one that contains many protons and neutrons in its atomic nucleus. Earth’s heavy elements came from stellar nucleosynthesis and supernovae.

A main sequence star burns hydrogen to produce helium and keeps a stable size. The sun will create elements up to carbon and oxygen. Larger stars can create elements up to iron before they collapse and explode in a supernova. Universally, the most unique thing is life as we know it.

Learn more about The Universe here:

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