| 1 | (D) | 2 | (C) | 3 | (B) | 4 | (B) | 5 | (D) |
| 6 | (A) | 7 | (D) | 8 | (A) | 9 | (D) | 10 | (D) |
| 11 | (A) | 12 | (C) | 13 | (A) | 14 | (A) | 15 | (D) |
| 16 | (A) | 17 | (B) | 18 | (A) | 19 | (D) | 20 | (B) |
| 21 | (A) | 22 | (D) | 23 | (A) | 24 | (C) | 25 | (B) |
| 26 | (C) | 27 | (C) | 28 | (D) | 29 | (D) | 30 | (C) |
| 31 | (C) | 32 | (A) | 33 | (C) | 34 | (D) | 35 | (B) |
| 1 | C | 2 | A | 3 | B | 4 | A | 5 | A |
| 6 | B | 7 | D | 8 | D | 9 | D | 10 | B |
| 11 | D | 12 | A | 13 | C | 14 | A | 15 | C |
| 16 | C | 17 | C | 18 | D | 19 | C | 20 | D |
| 21 | A | 22 | A | 23 | D | 24 | C | 25 | B |
| 26 | A | 27 | D | 28 | A | 29 | A | 30 | A |
| 31 | B | 32 | C | 33 | B | 34 | B | 35 | D |
| 1 | C | 2 | D | 3 | B | 4 | B | 5 | A |
| 6 | D | 7 | B | 8 | A | 9 | D | 10 | A |
| 11 | C | 12 | D | 13 | D | 14 | A | 15 | D |
| 16 | A | 17 | A | 18 | B | 19 | D | 20 | A |
| 21 | A | 22 | D | 23 | D | 24 | B | 25 | D |
| 26 | A | 27 | B | 28 | A | 29 | D | 30 | B |
| 31 | D | 32 | B | 33 | A | 34 | D | 35 | A |
CREST Science Olympiad (CSO) Answer Keys for the Academic Year 2023-24.