Across
- 1. The scientific classification of organisms into specially named groups based either on shared characteristics or on evolutionary relationships as inferred from the fossil record or established by genetic analysis.
- 9. The group OH. Hydroxyl is present in bases, certain acids, hydroxides, and alcohols.
- 10. A numerical measure of the acidity or alkalinity of a solution, usually measured on a scale of 0 to 14
- 11. a compound usually having a sour taste and are capable of neutralizing alkalis and reddening blue litmus paper
- 14. a systematic approach to acquiring new knowledge through observation and experimentation
- 17. A factor or condition that is subject to change, especially one that is allowed to change in a scientific experiment to test a hypothesis.
- 19. An atom or a group of atoms that has an electric charge. Positive ions, or cations, are formed by the loss of electrons; negative ions, or anions, are formed by the gain of electrons.
- 20. A standard of comparison for checking or verifying the results of an experiment
- 22. Often the scientific method the method of discovery used by scientists from the Enlightenment onward,
- 24. a graphic representation, as by curves, of a dependent variable, as temperature, price, etc.; graph.
- 25. that is or may be estimated by quantity.
Down
- 2. alkaline condition; the quality that constitutes an alkali.
- 3. A statement that explains or makes generalizations about a set of facts or principles, usually forming a basis for possible experiments to confirm its viability.
- 4. the quality or state of being acid
- 5. pertaining to or concerned with quality or qualities.
- 6. to derive by reasoning; conclude or judge from premises or evidence.
- 7. a logarithmic measure of how acidic or basic a solution is, ranging from 0 to 14
- 8. a key used to identify a plant or animal in which each stage presents descriptions of two distinguishing characters,
- 12. The systematic grouping of organisms according to the structural or evolutionary relationships among them.
- 13. an act of predicting.
- 15. to arrange or organize by classes; order according to class.
- 16. A diagram showing the relationship of quantities, especially such a diagram in which lines, bars, or proportional areas represent how one quantity depends on or changes with another.
- 18. Neither acid nor alkaline.
- 21. Any of a class of compounds that form hydroxyl ions (OH) when dissolved in water,and have a pH greater than 7.
- 23. a seeking or request for truth, information, or knowledge.