Chemistry

3. – Characteristics that describe matter, including physical and chemical attributes.
5. – The science that deals with the materials of the universe and the changes they undergo.
6. – The process by which a substance breaks down into simpler substances through chemical reactions.
7. – The degree to which a measured value may vary, reflecting limitations of measurement tools.
10. – A decimal-based measurement system used worldwide, based on powers of ten.
12. – The amount of three-dimensional space occupied by a substance.
13. – A separation technique involving boiling and condensation to separate substances.
14. – A combination of two or more substances where each retains its own properties.
15. – A statement that describes the consistent behavior observed in nature, often expressed mathematically.
17. – A well-substantiated explanation of an aspect of the natural world, based on evidence and repeated testing.
18. – The mass of a substance divided by its volume, expressed in g/cm³ or kg/L.
19. – A substance formed when two or more elements are chemically bonded together.
22. – The process of combining different substances to create a new compound or material.
24. – A mixture that has a uniform composition throughout (e.g., saltwater).

1. – Digits in a number that carry meaningful information about its precision.
2. – A quantitative observation that involves a number and a unit to express physical properties.
4. – A mathematical technique used to convert between units using conversion factors.
8. – A systematic approach used by scientists to investigate natural phenomena.
9. – The act of noting and recording something through the senses for scientific inquiry.
11. – The substance of which physical objects are composed; has mass and occupies space.
16. – A proposed explanation for a phenomenon that can be tested through experimentation.
20. – A mixture consisting of visibly different substances or phases (e.g., salad).
21. – A method that separates solid particles from liquids or gases using a barrier.
23. – A chemical process that uses electricity to break down compounds into elements.
25. – A pure substance that cannot be broken down into simpler substances by chemical means.