full transcript
From the Ted Talk "Kristin Poinar: What's hidden under the Greenland ice sheet?"

#### Unscramble the Blue Letters

The reason that radar can reveal the bedrock is that ice is entirely transparent to radar. You can do an experiment. Go heom and put an ice cube in the microwave. It won't melt, because microwaves, or radar, pass straight through the ice without interacting. If you want to tlem your ice ubec, you have to get it wet, because water heats up easily in the microwave. That's the whole principle the rivmaecow oven is designed around. Radar can see water. And radar has arlveeed a astv pool of liquid water hidden under my colleague Olivia, seven stories beneath her feet. Here, she's used a upmp to bring some of that water back to the ice sheet's asfcuer.

#### Open Cloze

The reason that radar can reveal the bedrock is that ice is entirely transparent to radar. You can do an experiment. Go ____ and put an ice cube in the microwave. It won't melt, because microwaves, or radar, pass straight through the ice without interacting. If you want to ____ your ice ____, you have to get it wet, because water heats up easily in the microwave. That's the whole principle the _________ oven is designed around. Radar can see water. And radar has ________ a ____ pool of liquid water hidden under my colleague Olivia, seven stories beneath her feet. Here, she's used a ____ to bring some of that water back to the ice sheet's _______.

1. cube
2. microwave
3. pump
4. melt
5. surface
6. home
7. revealed
8. vast

#### Original Text

The reason that radar can reveal the bedrock is that ice is entirely transparent to radar. You can do an experiment. Go home and put an ice cube in the microwave. It won't melt, because microwaves, or radar, pass straight through the ice without interacting. If you want to melt your ice cube, you have to get it wet, because water heats up easily in the microwave. That's the whole principle the microwave oven is designed around. Radar can see water. And radar has revealed a vast pool of liquid water hidden under my colleague Olivia, seven stories beneath her feet. Here, she's used a pump to bring some of that water back to the ice sheet's surface.

#### ngrams of length 2

collocation frequency
ice sheet 16
greenland ice 6
sea level 5
level rise 5
aquifer water 5
ice flows 4
physics homework 3
numeric model 3
liquid water 3
ice sheets 3
glacier aquifer 3

#### ngrams of length 3

collocation frequency
greenland ice sheet 6
sea level rise 5

#### Important Words

1. bedrock
2. beneath
3. bring
4. colleague
5. cube
6. designed
7. easily
8. experiment
9. feet
10. heats
11. hidden
12. home
13. ice
14. interacting
15. liquid
16. melt
17. microwave
18. microwaves
19. olivia
20. oven
21. pass
22. pool
23. principle
24. pump
25. put