Across
- 5. substances that donate additional H+ to a solution
- 8. substances that reduces the H+ in a solution
- 9. the characteristics of your experimental system that are subject to change.
- 10. organisms whose cells lack a nucleus and other organelles.
- 11. makes up most of the dry weight of any organism
- 12. anything that takes up space and has mass, composes organisms
- 14. a substance that cannot be broken down into other substances by chemical reactions.
- 15. burning of fossil fuels produces large amounts of gases such as carbon dioxide
- 16. an organism whose cells contain a nucleus within a membrane.
- 18. an idea or explanation that you then test through study and experimentation.
- 20. the simplest organic molecules
- 21. do not have an affinity for water, nonionic or nonpolar substances
- 22. a liquid that is a completely homogenous mixture of 2 or more substances
- 23. describes how many covalent bonds an atom can form
- 25. the substance dissolved in a solution (ie. salt)
Down
- 1. scientific-sounding claims that are not supported by trustworthy, methodical scientific studies
- 2. atoms of an element that have the same number of protons(atomic number), but a different amount of neutrons.
- 3. the dissolving agent of a solution (ie. water)
- 4. is crucial as it is the substance in which all the chemical processes of organisms occur
- 6. a substance consisting of two or more different elements combined in a fixed ratio.
- 7. a hypothesis for natural phenomena that is exceptionally well supported by the data.
- 13. the cell’s “energy currency”
- 17. study of the nature and behavior of natural things and the knowledge that we obtain about them.
- 19. has an affinity for water, may not always dissolve in water
- 24. the smallest unit of matter that still retains the properties of an element