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