full transcript
"From the Ted Talk by Fabio Pacucci: Could the Earth be swallowed by a black hole?"

#### Unscramble the Blue Letters

To determine whether a black hole could swallow the etarh, we first have to frgiue out where they are. But since they don’t emit light, how’s that possible? Fortunately, we’re able to observe their effect on the space around them. When matter approaches a black hole, the iesmnme gravitational field accelerates it to high speed. This etmis an enormous amount of light. And for objects too far away to be sucked in, the massive gravitational force still affects their orbits. If we observe several srats orbiting around an apparently empty point, a black hole could be leading the dance. Similarly, light that pssaes close enough to an eevnt horizon will be deflected in a phenomenon known as goataitianvrl lensing.

#### Open Cloze

To determine whether a black hole could swallow the **_____**, we first have to **______** out where they are. But since they don’t emit light, how’s that possible? Fortunately, we’re able to observe their effect on the space around them. When matter approaches a black hole, the **_______** gravitational field accelerates it to high speed. This **_____** an enormous amount of light. And for objects too far away to be sucked in, the massive gravitational force still affects their orbits. If we observe several **_____** orbiting around an apparently empty point, a black hole could be leading the dance. Similarly, light that **______** close enough to an **_____** horizon will be deflected in a phenomenon known as **_____________** lensing.

#### Solution

- gravitational
- immense
- earth
- emits
- event
- stars
- figure
- passes

#### Original Text

To determine whether a black hole could swallow the Earth, we first have to figure out where they are. But since they don’t emit light, how’s that possible? Fortunately, we’re able to observe their effect on the space around them. When matter approaches a black hole, the immense gravitational field accelerates it to high speed. This emits an enormous amount of light. And for objects too far away to be sucked in, the massive gravitational force still affects their orbits. If we observe several stars orbiting around an apparently empty point, a black hole could be leading the dance. Similarly, light that passes close enough to an event horizon will be deflected in a phenomenon known as gravitational lensing.
#### ngrams of length 2

collocation |
frequency |

black holes |
10 |

black hole |
9 |

supermassive black |
4 |

#### Important Words

- accelerates
- affects
- amount
- apparently
- approaches
- black
- close
- dance
- deflected
- determine
- earth
- effect
- emit
- emits
- empty
- enormous
- event
- field
- figure
- force
- fortunately
- gravitational
- high
- hole
- horizon
- immense
- leading
- lensing
- light
- massive
- matter
- objects
- observe
- orbiting
- orbits
- passes
- phenomenon
- point
- similarly
- space
- speed
- stars
- sucked
- swallow