Across
- 1. is the impetus for which a chemical substance undergoes a chemical reaction, either by itself or with other materials, with an overall release of energy.
- 4. is a radioactive chemical element with the symbol Cf and atomic number 98.
- 6. is a chemical element with the symbol Ag and atomic number 47.
- 7. SCIENCE is a branch of natural science that studies non-living systems, in contrast to life science.
- 8. is a material made up of two or more different substances which are physically combined.
- 9. is a nearly incompressible fluid that conforms to the shape of its container but retains a constant volume independent of pressure.
- 12. is the assignment of a number to a characteristic of an object or event, which can be compared with other objects or events.
- 14. s any individual entity that embodies the properties of life.
- 17. is the chemical element with the symbol N and atomic number 7.
- 19. is the degree to which a chemical substance or a particular mixture of substances can damage an organism.
- 21. is the chemical element with the symbol H and atomic number 1.
- 22. is the quantity of three-dimensional space occupied by a liquid, solid, or gas.
- 24. is a chemical element with the symbol K and atomic number 19.
- 26. is a chemical element with the symbol Au and atomic number 79,
- 28. is a species of atom having the same number of protons in its atomic nuclei. For example, the atomic number of oxygen is 8,
- 31. is a chemical element with the symbol He and atomic number 2.
- 32. sometimes called biological chemistry, is the study of chemical processes within and relating to living organisms.
- 33. is a chemical element with the symbol B and atomic number 5.
- 34. is a chemical element with the symbol Mn and atomic number 25.
- 36. is a special type of homogeneous mixture composed of two or more substances.
- 38. of a substance is its mass per unit volume.
- 39. is a procedure carried out to support, refute, or validate a hypothesis.
- 40. is a chemical element with the symbol As and atomic number 33.
- 42. is a proposed explanation for a phenomenon.
- 44. is a natural phenomenon by which all things with mass or energy—including planets, stars, galaxies, and even light—are brought toward one another.
- 45. is the chemical element with the symbol O and atomic number 8.
- 46. is closeness of the measurements to a specific value, while precision is the closeness of the measurements to each other.
Down
- 2. is a type of vaporization that occurs on the surface of a liquid as it changes into the gas phase.
- 3. mixture is a solid, liquid, or gaseous mixture that has the same proportions of its components throughout any given sample.
- 5. is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons, often in conjunction with other chemical changes.
- 6. is the transition of a substance directly from the solid to the gas state, without passing through the liquid state.
- 10. is the change of the physical state of matter from the gas phase into the liquid phase, and is the reverse of vaporization.
- 11. is a chemical element with the symbol Al and atomic number 13.
- 12. In classical physics and general chemistry, matter is any substance that has mass and takes up space by having volume
- 13. is a physical property of matter that quantitatively expresses hot and cold.
- 15. is both a property of a physical body and a measure of its resistance to acceleration when a net force is applied.
- 16. is the scientific study of earthquakes and the propagation of elastic waves through the Earth or through other planet-like bodies.
- 18. is a chemical element with the symbol Cu and atomic number 29.
- 20. is a high-temperature exothermic redox chemical reaction between a fuel and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke.
- 23. is a chemical element with the symbol Pb and atomic number 82.
- 25. are closely packed together and contain the least amount of kinetic energy.
- 27. is the scientific discipline involved with elements and compounds composed of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during a reaction with other substances.
- 29. is, broadly speaking, a solid chemical compound that occurs naturally in pure form.\
- 30. be made up of individual atoms, elemental molecules made from one type of atom, or compound molecules made from a variety of atoms.
- 34. is a layer inside a planetary body bounded below by a core and above by a crust.
- 35. is the outermost solid shell of a rocky planet,
- 36. is an empirical method of acquiring knowledge that has characterized the development of science since at least the 17th century.
- 37. is "creative and systematic work undertaken to increase the stock of knowledge, including knowledge of humans,
- 41. substance is a form of matter having constant chemical composition and characteristic properties.
- 43. s a contemplative and rational type of abstract or generalizing thinking about a phenomenon, or the results of such thinking.