Which statement below does NOT fit the model of the Big Bang and the subsequent changes in the universe?
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2 points
c) The universe has always existed in its current form.
The statement "The universe has remained unchanged since the Big Bang" does not fit the model of the Big Bang and the subsequent changes in the universe.
To determine which statement does not fit the model of the Big Bang and subsequent changes in the universe, we first need to understand the key concepts of the Big Bang theory.
The Big Bang theory proposes that the universe began as a singularity, a highly compressed and extremely hot state, approximately 13.8 billion years ago. It then rapidly expanded and has been continuously evolving ever since. During this expansion, galaxies and other celestial structures formed due to gravitational interactions.
Now let's examine the statements and determine which one does not fit the model:
1. The universe began as an incredibly dense and hot point.
This statement aligns with the Big Bang theory. According to the model, the universe originated from a singularity, a state of extremely high density and temperature.
2. After the Big Bang, the universe has been steadily contracting.
This statement contradicts the Big Bang theory. The model suggests that the universe has been expanding since its initial singularity, not contracting.
3. The formation of galaxies and other celestial structures occurred as a result of gravitational interactions.
This statement is consistent with the Big Bang theory. As the universe expanded, matter and energy clumped together under the influence of gravity, leading to the formation of galaxies, stars, and other celestial structures.
4. The expansion of the universe is accelerating over time.
This statement also aligns with the current understanding of the Big Bang theory. Observations support the idea that the expansion of the universe is not slowing down but rather accelerating due to a mysterious force called dark energy.
Based on the above explanations, the statement that does not fit the model of the Big Bang and subsequent changes in the universe is:
2. After the Big Bang, the universe has been steadily contracting.
According to the Big Bang theory, the universe has been expanding since its inception, not contracting.