Highlights
The Horseshoe Crab: A Living Fossil
George W. Frame
Science & Nature
Delaware Bay, Science Animal, Science Earth Air Ocean
HL
1,003
B2
English
9781682382967
Horseshoe crabs have been around since the time of dinosaurs. Find out how they live in the ocean by Delaware Bay.
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 | 0.46% |
| Eiken Grade 3 | 900 | 8.56% |
| Eiken Grade 4 | 600 | 14% |
| Eiken Grade 5 | 600 | 20% |
| Eiken Grade Pre1 | 2,868 | 0.21% |
| Eiken Grade Pre2 | 1,327 | 1.73% |
| Eiken Grade Pre2+ | 1,562 | 2.69% |
| NDL | 875 | 25.26% |
| NGSL 1 to 1,000 | 1,000 | 20.7% |
| NGSL 1,001 to 2,000 | 1,000 | 4.3% |
| NGSL 2,001 to 3,000 | 801 | 2.25% |
| NGSL Supplemental | 52 | 19.23% |
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% |