Select the correct answer from the list.(2 points) Dark matter absorb light, emit radiation, and been observed directly.
The correct answer is None of the above.
Dark matter does not absorb light, emit radiation, or been observed directly. Its presence is inferred based on its gravitational effects on visible matter.
Which characteristic is shared by both dark matter and baryonic matter?(1 point) Responses They both have been directly observed by scientists. They both have been directly observed by scientists. They both interact with each other. They both interact with each other. They both are capable of absorbing light. They both are capable of absorbing light. They both have gravity.
The characteristic shared by both dark matter and baryonic matter is that they both have gravity.
Which are accurate statements about dark matter? Select the two correct answers.(1 point) Responses Scientists are not convinced that dark matter exists. Scientists are not convinced that dark matter exists. New data could cause scientists to change their hypotheses about dark matter. New data could cause scientists to change their hypotheses about dark matter. Scientists have hypotheses about dark matter but need more data to test their ideas. Scientists have hypotheses about dark matter but need more data to test their ideas. Scientists thoroughly understand what dark matter is and what it does.
The two accurate statements about dark matter are:
1. New data could cause scientists to change their hypotheses about dark matter.
2. Scientists have hypotheses about dark matter but need more data to test their ideas.
Scientists are still actively studying and researching dark matter, and while there is strong evidence for its existence, there is still more to learn and discover.
The correct answer is:
- Dark matter does not absorb light.
- Dark matter does not emit radiation.
- Dark matter has not been observed directly.
The correct answer is: Dark matter has been observed indirectly through its gravitational effects.
To arrive at this answer, we can break down the options provided and eliminate the ones that do not accurately describe dark matter.
1. Dark matter absorbs light: This statement is incorrect. Dark matter does not interact with electromagnetic radiation (such as light) in the same way that normal matter does. It does not absorb, reflect, or emit light.
2. Dark matter emits radiation: This statement is also incorrect. Dark matter does not emit any detectable radiation.
3. Dark matter has been observed directly: This statement is incorrect. Dark matter has not been observed directly, meaning we have not yet directly detected individual dark matter particles or directly observed their interactions.
4. Dark matter has been observed indirectly through its gravitational effects: This statement is correct. Dark matter has been indirectly observed through its gravitational effects on visible matter, such as stars and galaxies. Scientists have observed that the amount of visible matter alone cannot account for the observed gravitational effects, suggesting the presence of additional matter (dark matter) that does not interact with light or emit radiation.
Therefore, the correct answer is that dark matter has been observed indirectly through its gravitational effects.