Highlights
Inventing Tiny Ears
Harry T. Roman
Animals
Science Inventions Technology, Sparks, Ears, Microsensors, Pin, Transformer
HL
537
C1
English
9781682382660
Have you ever seen a spark on electrical wires or cables? What happened cause the spark? How dangerous are these sparks? Meet an electrical power engineer who is developing spark detectors to prevent accidents and keep the power flowing.
Word lists coverage
The word and grammar lists are compiled from commercially available resources and English study websites. They are not intended to be authority. Use at your own discretion.| List | Total | Coverage |
|---|---|---|
| Eiken Grade 1 | 3,105 | 0.03% |
| Eiken Grade 2 | 866 | 0.58% |
| Eiken Grade 3 | 900 | 6.22% |
| Eiken Grade 4 | 600 | 10.33% |
| Eiken Grade 5 | 600 | 11.83% |
| Eiken Grade Pre1 | 2,868 | 0.21% |
| Eiken Grade Pre2 | 1,327 | 1.21% |
| Eiken Grade Pre2+ | 1,562 | 1.6% |
| NDL | 875 | 16% |
| NGSL 1 to 1,000 | 1,000 | 14.3% |
| NGSL 1,001 to 2,000 | 1,000 | 2.8% |
| NGSL 2,001 to 3,000 | 801 | 1.25% |
| NGSL Supplemental | 52 | 1.92% |
Grammar lists coverage
The word and grammar lists are compiled from commercially available resources and English study websites. They are not intended to be authority. Use at your own discretion.| List | Total | Unique | Coverage | Unique |
|---|---|---|---|---|
| Eiken Grade Pre1 | 94 | 94 | 0% | 0% |
| Eiken Grade 2 | 123 | 122 | 0% | 0% |
| Eiken Grade Pre2 | 111 | 108 | 0% | 0% |
| Eiken Grade 3 | 48 | 47 | 0% | 0% |
| Eiken Grade 4 | 52 | 49 | 0% | 0% |
| Eiken Grade 5 | 176 | 139 | 0% | 0% |
| A1 | 352 | 316 | 0% | 0% |
| A2 | 949 | 893 | 0% | 0% |
| B1 | 1,126 | 1,106 | 0% | 0% |
| B2 | 775 | 760 | 0% | 0% |
| C1 | 402 | 395 | 0% | 0% |
| C2 | 312 | 308 | 0% | 0% |