Understanding Dark Matter

The video discusses the concept of dark matter, emphasizing that 85% of the universe's gravity has no known origin. It suggests that 'dark gravity' might be a more accurate term, as the nature of dark matter is still unknown. The video explains how dark matter is measured in galaxies and explores the possibility of it being a family of subatomic particles that do not interact with ordinary matter. It highlights that dark matter does not interact with itself, leading to its diffuse distribution across the universe.

What percentage of the universe's gravity has no known origin?

• 85%

• 50%

• 95%

• 100%

Why might 'dark gravity' be a more accurate term than 'dark matter'?

• Because it implies we know it's matter

• Because it sounds cooler

• Because it is a more scientific term

• Because it reflects our understanding of its gravitational effects

What is the smallest aggregation of matter where dark matter manifests?

• Planets

• Galaxies

• Stars

• Moons

Which law is used to measure dark matter in galaxies?

• Law of Thermodynamics

• Law of Conservation of Mass

• Laws of Gravity

• Law of Relativity

What is a possible composition of dark matter?

• Subatomic particles

• Molecules

• Ordinary atoms

• Electromagnetic waves

Which particle is mentioned as an example of weak interaction with ordinary matter?

• Electrons

• Neutrons

• Protons

• Neutrinos

How does dark matter interact with ordinary matter?

• Chemically

• Nuclear

• Gravitationally

• Electromagnetically

Why doesn't dark matter form structures like planets or galaxies?

• It is too small

• It is too hot

• It doesn't interact with itself

• It is too far away

What holds a rock together at the atomic level?

• Nuclear forces

• Dark matter

• Gravitational forces

• Electromagnetic forces

Why is interaction important for the formation of life as we know it?

• It allows for the accumulation of mass

• It creates energy

• It forms solid objects

• It enables chemical reactions