Question

7. Which is a characteristic of dark matter?
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1 point
it does not interact with baryonic matter
it has not been observed directly.
it interacts with electromagnetic radiation.
humans can see it

Answer 1

8. Which statement is INCORRECT about Cosmic Microwave Background radiation?
*
2 points
its temperature is uniform.
it consists of electromagnetic radiation that is a remnant of the Big Bang.
It appears uniformly across the universe.
it appeared only a few years ago

Answer 2

The correct answer is: it does not interact with baryonic matter. Dark matter is a hypothetical form of matter that does not interact with or emit electromagnetic radiation, which is why it cannot be directly observed.

Answer 3

The incorrect statement about Cosmic Microwave Background radiation is: it appeared only a few years ago.

The Cosmic Microwave Background radiation is a remnant of the Big Bang and has been present since the early stages of the universe's formation. It permeates the entire observable universe and appears uniformly, providing evidence for the Big Bang theory. The temperature of the Cosmic Microwave Background radiation is also observed to be nearly uniform across the sky.