TED TALK - dark matter tbe matter we can't see

According to the ancient Greeks, what are the four elements that make up the universe?

• earth, air, fire, and water

• hydrogen, carbon, iron, and oxygen

• atoms, dark matter, dark energy, and light

• supersymmetry, SUSY, harmonics, and string

What is the advantage of the atoms theory over the earth, air, fire, and water theory?

• It is simple and elegant

• It predicts measurable results

• It explains the dark universe

• It accounts for 95% of the universe

What percentage of the universe is made up of dark matter?

• 5%

• 27%

• 68%

• 95%

What evidence led scientists to discover the existence of dark matter?

• Measurements of the cosmic microwave background

• Observation of stars and galaxies

• Motion of groups of galaxies

• Weighing the amount of matter in galaxies

What is the best evidence for the existence of dark matter today?

• The afterglow of the Big Bang

• Measurements of the cosmic microwave background

• Observation of stars and galaxies

• Motion of groups of galaxies

What is dark energy believed to be responsible for?

• The acceleration of the universe's expansion

• The formation of galaxies

• The creation of atoms

• The existence of dark matter

What percentage of the universe is believed to be made up of dark energy?

• 5%

• 27%

• 68%

• 95%

What theory predicts a range of new particles that could make up the dark matter?

• Supersymmetry

• String theory

• Dark energy theory

• Ancient Greek theory

What is the idea behind string theories?

• All particles are different harmonics on a vibrating string

• All particles are made up of atoms

• All particles are made up of dark matter

• All particles are made up of dark energy

What is the main message conveyed in the text?

• The universe is simple and can be explained by a few elements

• Dark matter and dark energy make up the majority of the universe

• Scientists have a complete understanding of the universe

• Humans are insignificant in the grand scheme of the universe