Dark Matter

The rotation curves of galaxies, providing evidence for dark matter, show that:

• The velocity of stars in the outer parts of galaxies decreases sharply with distance from the center.

• The velocity of stars in the outer parts of galaxies remains constant or increases slightly with distance from the center, contrary to what is expected from visible matter alone.

• All stars in a galaxy rotate at the same speed, regardless of their distance from the center.

• The velocity of stars in the inner parts of galaxies decreases with distance from the center.

How is dark matter studied?

• NASA and the ESA send astronauts to space to collect dark matter samples.

• The ESA built a satellite to orbit dark matter and take pictures.

• NASA built a rover to use after landing on dark matter.

• Studied indirectly on Earth as light passes through a gravitational lens.

Which of the following supports the idea of dark matter?

• Many instances of detected WIMPS

• Dark blobs seen around galaxies.

• Lensing of light around galaxy clusters.

Tags

NGSS.HS-PS2-4

Most of the universe is made of

• visible matter

• Invisible matter

• dark energy

• dark energy and dark matter

How did scientists realize that dark matter should exist?

• Normal matter wouldn't have enough gravity to form galaxies.

• By looking at the sky with a superhigh resolution telescope
  

• They got messages from creatures living in dark matter.

• By crashing a spacecraft into a large region of dark matter.

Which astronomer is responsible for discovering that dark matter causes galaxies to spin faster at the outer edges than they should?

• Fritz Zwicky

• Vera Rubin

• Jocelyn Bell

• Annie Cannon

What is the name of the radio telescope complex that scientists used to map the structure of the universe and study dark matter?

• ALMA

• ATACIMA

• VLA

• WIMP

Tags

NGSS.HS-PS4-5

What is dark matter primarily composed of?

• Baryonic matter

• Non-baryonic matter

• Antimatter

• Photons

Which of the following is a method used to detect dark matter?

• Direct observation through telescopes

• Gravitational lensing

• Measuring electromagnetic radiation

• Chemical analysis

What percentage of the universe is estimated to be dark matter?

• 5%

• 27%

• 68%

• 100%