Highlights
Secrets of the Rainbow
Ken Croswell
Science & Nature
atmosphere||rhymes|sunrise|sunshine|yellow|raining|wavelengths|infrared|phenomenon|sun|colors|space|red|how-to|refraction|visible color spectrum|the Sun|rainbows|weather|light radiation|pot of gold|sky|rain|green|meteorology|violet|green fields|raindrop|orange|rainbow|sayings|sunlight|blue|light|spectrum|raindrops|radiation|ultraviolet|science|sunset|color spectrum|purple|indigo|invisible color spectrum|landscape
HL
744
B1
English
9781644720844
Ken Croswell, Ph.D., explains how rainbows appear and gives tips on how to find them.
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 | 0.16% |
| Eiken Grade 2 | 866 | 0.46% |
| Eiken Grade 3 | 900 | 8.33% |
| Eiken Grade 4 | 600 | 12.83% |
| Eiken Grade 5 | 600 | 15.5% |
| Eiken Grade Pre1 | 2,868 | 0.07% |
| Eiken Grade Pre2 | 1,327 | 0.75% |
| Eiken Grade Pre2+ | 1,562 | 1.34% |
| NDL | 875 | 17.49% |
| NGSL 1 to 1,000 | 1,000 | 15.3% |
| NGSL 1,001 to 2,000 | 1,000 | 3.6% |
| NGSL 2,001 to 3,000 | 801 | 1.12% |
| NGSL Supplemental | 52 | 5.77% |
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% |