Highlights
The Mighty Volcanoes of Mars
Ken Croswell, Ph.D.
Science & Nature
Mars, Olympus Mons, volcanoes, astronomy
HL
737
B2
English
9781643038568
Four billion years ago, volcanoes made Mars warm enough for rivers to flow.
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 | 0.06% |
| Eiken Grade 2 | 866 | 0.35% |
| Eiken Grade 3 | 900 | 7.89% |
| Eiken Grade 4 | 600 | 13% |
| Eiken Grade 5 | 600 | 15% |
| Eiken Grade Pre1 | 2,868 | 0.42% |
| Eiken Grade Pre2 | 1,327 | 1.58% |
| Eiken Grade Pre2+ | 1,562 | 1.86% |
| NDL | 875 | 19.2% |
| NGSL 1 to 1,000 | 1,000 | 16.1% |
| NGSL 1,001 to 2,000 | 1,000 | 3.8% |
| NGSL 2,001 to 3,000 | 801 | 1.5% |
| NGSL Supplemental | 52 | 7.69% |
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% |