Consider the following statements regarding Dark Matter and Dark Energ...
Statement 1: Dark energy is a mysterious force that drives the accelerating expansion of the universe.
This statement is correct. Dark energy is a hypothetical form of energy that is believed to be responsible for the accelerating expansion of the universe. It is called "dark" because it does not emit, absorb, or reflect any electromagnetic radiation, making it invisible and difficult to study. The discovery of the accelerating expansion of the universe in the late 1990s led scientists to propose the existence of dark energy.
Statement 2: Dark matter interacts with the universe through its gravity.
This statement is correct. Dark matter is a form of matter that does not interact with electromagnetic radiation, hence making it invisible. However, it does interact with the universe through its gravitational effects. Dark matter exerts a gravitational pull on visible matter, such as galaxies and stars, causing them to move in ways that cannot be fully explained by the visible matter alone. Although dark matter has not been directly detected, its presence is inferred from its gravitational effects on visible matter.
Statement 3: Dark Energy constitutes roughly 27% and Dark matter makes up about 68% of the universe.
This statement is incorrect. The current estimates suggest that dark energy constitutes approximately 68% of the total energy density of the universe, while dark matter makes up around 27%. The remaining 5% is composed of ordinary matter, the matter that we can see and interact with through electromagnetic radiation.
To summarize:
- Statement 1 is correct, as dark energy is a mysterious force driving the accelerating expansion of the universe.
- Statement 2 is correct, as dark matter interacts with the universe through its gravitational effects.
- Statement 3 is incorrect, as dark energy constitutes around 68% of the universe, while dark matter makes up approximately 27%.
Consider the following statements regarding Dark Matter and Dark Energ...
Statement 3 is incorrect.
- Most of the universe is made up of dark energy, a mysterious force that drives the accelerating expansion of the universe.
- The next largest ingredient is dark matter, which only interacts with the rest of the universe through its gravity.
- Normal matter, including all the visible stars, planets and galaxies, makes up less than 5 percent of the total mass of the universe.
- Dark Energy constitutes roughly 68% of the universe. Dark matter makes up about 27%.