13. Which characteristic is shared by both dark matter and baryonic matter?
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1 point
They both have gravity
They both are capable of absorbing light
They both interact with each other
They both have been directly observed by scientists
They both have gravity
The characteristic shared by both dark matter and baryonic matter is that they both have gravity.
To determine which characteristic is shared by both dark matter and baryonic matter, we can examine each option and consider the facts.
1. They both have gravity: This is true for both dark matter and baryonic matter. Gravity is a fundamental force that affects both types of matter.
2. They both are capable of absorbing light: This is not true for dark matter. Dark matter does not interact with light or electromagnetic radiation in the same way as baryonic matter. It does not emit, absorb, or reflect light, which is why it is called "dark."
3. They both interact with each other: This is also true for both dark matter and baryonic matter. They both experience gravitational interactions with other forms of matter. For example, stars, galaxies, and other structures in the universe are influenced by both dark matter and baryonic matter through their gravitational effects.
4. They both have been directly observed by scientists: This is not entirely accurate. Baryonic matter, which comprises ordinary matter such as atoms, has been directly observed and studied in various ways. However, dark matter has not been directly observed yet. Scientists have inferred its existence through its gravitational effects on other visible matter and the cosmic microwave background radiation.
Based on the above analysis, the characteristic shared by both dark matter and baryonic matter is that they both have gravity. Therefore, the correct answer is:
- They both have gravity.