full transcript
From the Ted Talk by Risa Wechsler: The search for dark matter -- and what we've found so far
Unscramble the Blue Letters
But we have a lot of educated gsseeus, and a lot of ideas for how to find out more. So, most physicists think that dark matter is a particle, similar in many ways to the subatomic particles that we know of, like protons and neutrons and eenorclts. Whatever it is, it behaves very similarly with reespct to girvaty. But it doesn't emit or absorb lghit, and it goes right through normal matter, as if it wasn't even there. We'd like to know what particle it is. For example, how heavy is it? Or, does anything at all happen if it interacts with normal matter? Physicists have lots of great ideas for what it could be, they're very creative. But it's really hard, because those ideas span a huge range. It could be as small as the smallest subatomic paetcirls, or it could be as large as the mass of 100 Suns.
Open Cloze
But we have a lot of educated _______, and a lot of ideas for how to find out more. So, most physicists think that dark matter is a particle, similar in many ways to the subatomic particles that we know of, like protons and neutrons and _________. Whatever it is, it behaves very similarly with _______ to _______. But it doesn't emit or absorb _____, and it goes right through normal matter, as if it wasn't even there. We'd like to know what particle it is. For example, how heavy is it? Or, does anything at all happen if it interacts with normal matter? Physicists have lots of great ideas for what it could be, they're very creative. But it's really hard, because those ideas span a huge range. It could be as small as the smallest subatomic _________, or it could be as large as the mass of 100 Suns.
Solution
- guesses
- light
- particles
- gravity
- electrons
- respect
Original Text
But we have a lot of educated guesses, and a lot of ideas for how to find out more. So, most physicists think that dark matter is a particle, similar in many ways to the subatomic particles that we know of, like protons and neutrons and electrons. Whatever it is, it behaves very similarly with respect to gravity. But it doesn't emit or absorb light, and it goes right through normal matter, as if it wasn't even there. We'd like to know what particle it is. For example, how heavy is it? Or, does anything at all happen if it interacts with normal matter? Physicists have lots of great ideas for what it could be, they're very creative. But it's really hard, because those ideas span a huge range. It could be as small as the smallest subatomic particles, or it could be as large as the mass of 100 Suns.
Frequently Occurring Word Combinations
ngrams of length 2
collocation |
frequency |
dark matter |
23 |
billion years |
3 |
small galaxies |
3 |
small clumps |
3 |
model universes |
2 |
big bang |
2 |
dark energy |
2 |
million galaxies |
2 |
light distorted |
2 |
magellanic cloud |
2 |
Important Words
- absorb
- behaves
- creative
- dark
- educated
- electrons
- emit
- find
- gravity
- great
- guesses
- happen
- hard
- heavy
- huge
- ideas
- interacts
- large
- light
- lot
- lots
- mass
- matter
- neutrons
- normal
- particle
- particles
- physicists
- protons
- range
- respect
- similar
- similarly
- small
- smallest
- span
- subatomic
- suns
- ways