Across
- 2. the study or creation of theories about basic things such as the nature of existence, knowledge, and thought, or about how people should live
- 4. the study of numbers, shapes, and space using reason and usually a special system of symbols
- 5. the scientific study of the basic characteristics of substances and the ways in which they react or combine
Down
- 1. the scientific study of matter and energy and the effect that they have on each other
- 3. the study of or a record of past events considered together, especially events of a particular