| 100% | OZONE | 5 | Form of oxygen that composes a namesake layer of the atmosphere |
| 45% | OZONE | 5 | Gas in a layer of the atmosphere |
| 45% | OZONE | 5 | Gas forming a protective layer in the atmosphere |
| 43% | OZONE | 5 | Layer in the atmosphere that famously developed a "hole" |
| 43% | IONOSPHERE | 10 | Layer of the earth's atmosphere that lies above the mesosphere |
| 42% | OZONE | 5 | Colourless gas which forms a layer within the Earth's atmosphere |
| 41% | OZONE | 5 | The earth has a layer of it; three oxygen atoms |
| 41% | OZONE | 5 | Colourless gas which forms a layer within the Earth’s atmosphere |
| 40% | YALU | 4 | River that forms a large part of the border between North Korea and China |
| 40% | FUNNEL | 6 | Shape of cloud that forms the core of a tornado |
| 40% | NEBULIZER | 9 | Device that delivers drugs in the form of a mist |
| 40% | SATURN | 6 | Planet that shares its namesake with a day of the week |
| 39% | AUGMENTED | 9 | With 50-Across, category of games that provide a layer on top of the physical world |
| 39% | BALI | 4 | Island that’s the birthplace of jegog, a form of gamelan music |
| 38% | BRICKWALL | 9 | Masonry structure that forms the side of a house |
| 38% | OZONE | 5 | Important layer of the atmosphere |
| 38% | OZONE | 5 | Thinning layer of the atmosphere |
| 38% | OZONE | 5 | Protective layer of the atmosphere |
| 38% | PUN | 3 | Joke with a homophone, say, that is the so-called "lowest form of humor" |
| 38% | SATIRE | 6 | Scrabble sextet that can form a seven-letter word with 18 of the 26 |
| 38% | YOGA | 4 | Form of exercise that includes a cobra pose |
| 38% | MALAGA | 6 | Spanish port town that's the namesake of a dessert wine |
| 37% | OZONE | 5 | Form of oxygen in atmosphere |
| 37% | OZONE | 5 | Layer of the upper atmosphere |
| 37% | ANAGRAM | 7 | A word or phrase that can be formed using the letters of another word |
| 37% | UNCANNYVALLEY | 13 | Phenomenon that is “probably a form of instinct that protects us from proximal . . . sources of danger,” per the roboticist Masahiro Mori |
| 37% | DIAMOND | 7 | A form of carbon that is a very hard gemstone |
| 37% | BOHR | 4 | Physicist with a namesake model of the atom |
| 37% | NICOBAR | 7 | — Islands, chain in the Indian Ocean that form, with the Andaman Islands, a Union Territory of India |
| 37% | EXOSPHERE | 9 | The outermost layer of an atmosphere |