sam's

3. The 'powerhouses' of biological cells
8. The voice box
9. The corresponding anti-particle of the electron, used in a type of medical scan
11. The medical term for 'sneezing'
13. A programming language that's also an animal
14. The largest prefix (e.g. kilo, milli, giga etc.)
15. This hardware carries out all the instructions of a computer - the 'brains' of the computer
16. The third lightest element
17. One of the four bases of nucleic acids

1. A large family of animals that includes insects, spiders and crustaceans
2. The opposite of differentiation
4. When a wave passes through a narrow gap and 'spreads out'
5. When a particle and antiparticle destroy each other
6. The splitting of large atomic nuclei (the basis of nuclear energy)
7. The mathematical name for an 'oval' shape
10. When water moves from a high concentration of water to a low concentration of it
12. A process that takes place in organisms that gives them energy
13. The carrier particle of the electromagnetic force
18. The mathematician who invented calculus, and has a unit of force named after him