Unit 2

2. atom becomes negatively charged by gaining one or more electrons
6. atom with a positive charge after losing one or more electrons
9. dense collection of protons and neutrons at the center of an atom
10. positively charged subatomic particle in nucleus of an atom
13. metabolism that breaks nutrients into energy in absence of oxygen
15. reaction that releases energy as heat or light
16. subatomic particle in nucleus with no electrical charge and heavier than proton
17. capable of being continued with minimal long-term effects
19. chemical process in which energy is extracted from breaking bonds
21. metabolism that breaks nutrients into energy in presence of oxygen
22. measure of randomness and quantitative measure of disorder
23. Gas trapped in Earth’s atmosphere an allow more heat to pass through to Earth

1. energy transfer when particles vibrate and strike other particles
3. negatively charged terminal
4. energy transfer by expansion of matter with higher thermal energy
5. reaction that absorbs thermal energy
7. amount of heat required to raise temperature of 1g by one degree Celsius
8. chemical process in which energy is required to build bonds
11. substance that ionizes or breaks down into positively and negatively charged ions
12. temperature in which a substance in solid form changes into liquid form
14. moving body by virtue of its motion and mass
18. negatively charged subatomic particle
20. positively charged terminal