Science quiz
Science answers that start with C
Every answer on this board begins with C. The clues are a mixed bag: elements, units, planets, rocks, bones and whatever else the letter allows. Type the answers in any order.
- Format
- Type them all
- Items
- 20 answers
- Limit
- 5:00
- Level
- Medium
- Checked
- 2026.10.03
- Answers
- 20
- Time limit
- 5:00
- Order
- Any order
- Matching
- Case and accents ignored
- Type an answer; it files itself the moment it matches.
- One answer can fill several slots.
- Give up at any time to see what you missed.
- Pause whenever you like (Esc). The board hides while the clock is stopped.
Answer each science clue. Every answer starts with C.
| Clue | Answer |
|---|---|
| SI unit of electric charge | Not found yet |
| Bone or bones: encloses the brain | Not found yet |
| Geological period that began 538.8 million years ago | Not found yet |
| Cloud type with the code Ci | Not found yet |
| SI base unit of luminous intensity | Not found yet |
| Compound with the formula CO₂ | Not found yet |
| Mineral that defines 3 on the Mohs hardness scale | Not found yet |
| Dwarf planet: the largest object in the asteroid belt | Not found yet |
| A major moon of Jupiter | Not found yet |
| SI prefix for 10⁻² | Not found yet |
| Clue | Answer |
|---|---|
| Rank 4 of 8 in taxonomy, from broadest to narrowest | Not found yet |
| Chemical name of vitamin B12 | Not found yet |
| Constellation of the zodiac: the Crab | Not found yet |
| Layer of the Earth or its atmosphere: about 5 km under oceans, 30 km on average under continents | Not found yet |
| Beaufort scale force 0 | Not found yet |
| Second brightest star in the night sky, in Carina | Not found yet |
| Element 6, symbol C | Not found yet |
| Bone or bones: collarbone | Not found yet |
| Geological period that began 358.86 million years ago | Not found yet |
| Cloud type with the code Cc | Not found yet |
About this quiz
A mixed science round with one rule: the answer always starts with C. Knowing the first letter helps more than you might expect, and less than you would like.
- There are 20 clues on this board, 1 of them for chemical elements.
- Element clues give the atomic number and the symbol.
- Spelling is forgiving about capitals, accents and hyphens, and both British and American element spellings are accepted.
Sources
- [1]National Institute of Standards and Technology. SP 330: The International System of Units, section 2.
- [2]BIPM. The SI.
- [3]National Cancer Institute, SEER Training. Divisions of the skeleton.
- [4]NOAA National Weather Service. JetStream: Ten basic clouds.
- [5]BIPM. SI base units.
- [6]PubChem, National Institutes of Health. PubChem compound database.
- [7]U.S. National Park Service. Mohs Hardness Scale.
- [8]NASA. Dwarf planets.
- [9]NASA. Jupiter moons.
- [10]NASA. Saturn moons.
- [11]NASA. Uranus moons.
- [12]NASA. Neptune moons.
- [13]NASA. Moons of our solar system.
- [14]BIPM. SI prefixes.
- [15]MedlinePlus, U.S. National Library of Medicine. Vitamins.
- [16]MedlinePlus, U.S. National Library of Medicine. Vitamin A.
- [17]MedlinePlus, U.S. National Library of Medicine. Vitamin D.
- [18]MedlinePlus, U.S. National Library of Medicine. Vitamin K.
- [19]U.S. Geological Survey. This Dynamic Earth: Inside the Earth.
- [20]NASA. Earth's atmosphere: a multi-layered cake.
- [21]Met Office. Beaufort wind force scale.
- [22]PubChem, National Institutes of Health. Periodic Table of Elements.
Last checked October 3, 2026
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