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Across
  1. 2. An amorphous (non-crystalline) form of matter between a gas and a solid that has a definite volume, but no definite shape.
  2. 6. A substance formed when two or more chemical elements are chemically bonded together.
  3. 7. The scientific study of plants
  4. 9. The branch of science concerned with the processes and phenomena of the atmosphere, especially as a means of forecasting the weather.
  5. 13. A substance consisting of atoms which all have the same number of protons - i.e. the same atomic number.
  6. 15. Property that changes when the size of the sample changes. Examples are mass, volume, length.
  7. 16. A substance that is produced or used in a process (reaction) involving changes to atoms or molecules.
  8. 18. The basic unit of a chemical element.
  9. 21. The branch of chemistry concerned with the application of the techniques and theories of physics to the study of chemical systems.
  10. 24. Used to express liters, cubic meters, gallons, milliliters, teaspoons and ounces.
  11. 25. An airlike fluid substance which expands freely to fill any space available, irrespective of its quantity.
  12. 26. Properties, such as density and color, do not depend on the amount of matter.
  13. 28. The branch of science that deals with the identification of the substances of which matter is composed.
  14. 30. An ionized gas consisting of positive ions and free electrons in proportions resulting in more or less no overall electric charge, typically at low pressures
Down
  1. 1. Any substance that has a uniform and unchanging composition is considered to be pure.
  2. 3. A distinctive smell, especially an unpleasant one.
  3. 4. Elements that form cations when compounds of it are in solution and oxides of the elements form hydroxides rather than acids in water.
  4. 5. These include carbon monoxide, carbon dioxide, carbonates, cyanides, cyanates, carbides, and thiocyanates.
  5. 8. Subdiscipline involving the scientific study of the structure, properties, and reactions of compounds
  6. 10. A measure of the intensity of heat, i.e. the hotness or coldness of a sample. or object.
  7. 11. The scientific study of the behavior, structure, physiology, classification, and distribution of animals.
  8. 12. A metabolic process in plants and certain bacteria, using light energy absorbed by chlorophyll.
  9. 14. Relating to living organisms.
  10. 17. In chemistry, a heavy, silvery metallic element, a liquid at normal temperatures and it's toxic.
  11. 19. Studies the composition, structure, properties and change of matter.
  12. 20. A physically distinctive form of matter.
  13. 22. Packed together much closer than the particles in a gas or liquid.
  14. 23. Anything that has mass and takes up space.
  15. 27. Dealing with radioactivity.
  16. 29. A measure of the amount of matter in an object.