Understanding Dark Matter

What analogy is used to describe the behavior of dark matter?

• A basketball bouncing off a wall

• A car skidding on ice

• A bird flying in a straight line

• A football changing direction mid-flight

Why is dark matter difficult to detect?

• It is too small to be seen

• It is hidden behind other celestial bodies

• It moves too quickly

• It does not interact with electromagnetic radiation

Who was one of the first astronomers to propose the existence of dark matter?

• Jan Oort

• Isaac Newton

• Galileo Galilei

• Albert Einstein

What did Jan Oort propose about dark matter?

• It is three times as abundant as bright matter near the sun

• It is made of antimatter

• It is visible under certain conditions

• It is responsible for black holes

How does dark matter affect the movement of stars in galaxies?

• It slows them down significantly

• It makes them disappear

• It causes them to move in random directions

• It keeps their velocities consistent regardless of distance from the center

What percentage of the universe's content is made up of known galaxies and stars?

• 10%

• 25%

• 5%

• 50%

How do astronomers study dark matter?

• By capturing it in a laboratory

• By measuring its temperature

• By using infrared telescopes

• By observing its effects on visible celestial bodies

What did the Hubble Space Telescope reveal about dark matter in 1997?

• It detected sound waves from dark matter

• It showed light bending due to an unknown cluster

• It captured an image of dark matter

• It showed dark matter emitting light

What are some hypotheses about the composition of dark matter?

• It is a form of visible light

• It is composed of pure energy

• It consists of regular space objects like dark galaxies

• It is made of antimatter

Why is understanding dark matter important for our knowledge of the universe?

• It will make space travel safer

• It will allow us to create new elements

• It will explain mysterious phenomena and the universe's evolution

• It will help us travel faster than light