Which ideas describe the Big Crunch
1. The Big Bang actually never occurred, and the universe must have a different Origin
2. The universe is not only composed of the objects that we can see
3. The universe goes through infinite cycles of expansion and contraction.
4. After the universe reaches it’s expansion limit gravity will pull it back together
The correct option that describes the Big Crunch is:
4. After the universe reaches its expansion limit, gravity will pull it back together.
To elaborate on getting the answer, one approach is to have a basic understanding of the current models and theories regarding the universe's fate. In this case, the question refers to the concept of the "Big Crunch," which is a hypothetical scenario in cosmology. Here's how you can arrive at the correct answer:
1. Read and analyze each option carefully:
a. Option 1 suggests that the Big Bang never occurred, which is a misconception. The Big Bang theory explains the universe's current state.
b. Option 2 talks about the composition of the universe, which is unrelated to the Big Crunch.
c. Option 3 discusses the idea of cycles of expansion and contraction, a concept known as "Big Bounce" or "Cyclic Model." While it's a valid cosmological concept, it does not directly describe the Big Crunch.
d. Option 4 implies that when the universe reaches its expansion limit, gravity will cause it to collapse, leading to the Big Crunch.
2. Compare the options and focus on the concept of the Big Crunch:
a. None of the options apart from option 4 mention the concept of the Big Crunch.
b. Option 4, "After the universe reaches its expansion limit, gravity will pull it back together," aligns with the idea of the Big Crunch.
3. Select the correct answer:
Option 4 correctly describes the Big Crunch, as it states that the universe will eventually stop expanding and will be pulled back together by gravity.
Therefore, the correct answer is option 4 - "After the universe reaches its expansion limit, gravity will pull it back together."