Across
- 3. A plastid that contains chlorophyll and is the site of photosynthesis
- 7. A nucleic acid found in cells
- 9. The smallest particles
- 12. Negative Charge and its in the atom shell.
- 13. Used to separate a mixture of substances. The filtered paper would identify the substances by colouring the paper.
- 14. The number of protons in the nucleus of an atom (atomic number)
- 15. A solid that usually gets more soluble as the temperature rises.
- 17. The random motion of particles that you can see with naked eyes, or under microscope
- 18. Particles that are atoms or groups of atoms that carry a charge
- 19. Substance which is made of atoms of different elements, bonded together
- 24. All the solvent you heat the mixture and the liquid substance slowly evaporates living the solid substance (separation method
- 25. solute+solvent
- 27. The rows in the periodic table
- 30. A chemical change is usually called a __________
- 32. A solution is called ______ when it can dissolve no more solute, at that temperature.
- 34. The total number of protons and neutrons in the nucleus of an atom (mass number)
- 35. solvent Water is called the ______ because more substances dissolve in water than in any other chemical.
- 37. Substance which contains different substances that are not bonded together.
- 38. An action by an organism or part of an organism causing a change of position or place. Most single- celled creatures and animals move about as a whole. Fungi and plants may make movements with parts of their bodies
- 40. In the nucleus, positive charge
- 41. Fixed shape and volume (state of matter)
- 42. A substance that has no other substance mixed with it.
Down
- 1. Separate a mixture of liquids from each other (distillation)
- 2. Is a thin coat of lipids that surrounds a cell (also called cell membrane)
- 4. Obtain the solvent from a solution (distillation).
- 5. Is used a filter that lives the residue, the part that is taken away (separation method)
- 6. The mixing process of particles
- 8. Centre of an atom
- 10. You can obtain many solids from their solutions by letting crystals form (separation method)
- 11. The way in which the elements are divided in the periodic table
- 16. An substance, mixed with the substance you want, is called an impurity.
- 20. Water polarity helps _____ ionic compounds
- 21. Does not have a fixed shape and volume (state of matter)
- 22. The molecule has both a positively and negatively charged end
- 23. Fixed volume, but its shape changes (state of matter)
- 26. A substance that dissolves just a little.
- 28. Membrane of the cell that forms external to the cell membrane whose main role is to give cells rigidity, strength and protection against mechanical stress
- 29. Two or more atoms joined together
- 31. Cellular material inside the plasma membrane
- 33. Describes the chemical reactions in cells that break down nutrient molecules and release energy for metabolism. Most organisms need oxygen for this.
- 36. In the nucleus, NO charge
- 39. A membrane-bound cytoplasm found in the cytoplasm of a cell whose function includes intracellular secretion, excretion, storage, and digestion