Materia oscura

The video explores the concept of dark matter, a mysterious substance that cannot be directly observed. By examining the rotation of spiral galaxies, scientists infer the existence of more matter than is visible. This unseen matter is believed to exert gravitational influence, possibly due to undiscovered fundamental particles that interact weakly with ordinary matter.

What is the primary method used to infer the existence of unknown matter?

• Studying the movement of objects in space

• Direct observation through telescopes

• Measuring the temperature of stars

• Chemical analysis of cosmic dust

What conclusion is drawn from the way spiral galaxies rotate?

• Galaxies are shrinking over time

• There is more matter than we can currently explain

• Galaxies are moving away from each other

• The universe is cooling down

What do most physicists believe about the unseen matter?

• It is the gravitational influence of undiscovered particles

• It is a form of energy

• It is a type of dark energy

• It is made of known elements

How do these fundamental particles interact with ordinary matter?

• They interact strongly

• They interact only at high temperatures

• They do not interact at all

• They interact very weakly

What is the main challenge in discovering these fundamental particles?

• They interact very weakly with ordinary matter

• They move too quickly to be observed

• They are hidden behind cosmic dust

• They are too small to detect