Question 1:

What is dark matter?

Explanation: Dark matter refers to invisible particles that emit no light but have gravitational effects on visible matter.

Question 2:

What evidence supports the existence of dark matter?

Explanation: Both observations of gravitational lensing and measurements of galaxy rotation curves provide evidence for the existence of dark matter.

Question 3:

What is dark energy?

Explanation: Dark energy is a mysterious form of energy that is causing the accelerated expansion of the universe.

Question 4:

What percentage of the universe is estimated to be composed of dark energy?

Explanation: Dark energy is estimated to make up more than 70% of the universe.

Question 5:

What effect does dark energy have on the expansion of the universe?

Explanation: Dark energy causes the expansion of the universe to accelerate, pushing galaxies apart at an increasing rate.