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Phases, Phase Changes, Chemical and Physical Changes

Phases, Phase Changes, Chemical and Physical Changes. Science Fifth Grade Mr. Pate. Standards. S5P2. Students will explain the difference between a physical change and a chemical change.

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Phases, Phase Changes, Chemical and Physical Changes

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  1. Phases, Phase Changes, Chemical and Physical Changes Science Fifth Grade Mr. Pate

  2. Standards • S5P2. Students will explain the difference between a physical change and a chemical change. • a. Investigate physical changes by separating mixtures and manipulating (cutting, tearing, folding) paper to demonstrate examples of physical change. • b. Recognize that the changes in state of water (water vapor/steam, liquid, ice) are due to temperature differences and are examples of physical change.

  3. Standards • c. Investigate the properties of a substance before, during, and after a chemical reaction to find evidence of change. • S5P1. Students will verify that an object is the sum of its parts

  4. Standards • a. Demonstrate that the mass of an object is equal to the sum of its parts by manipulating and measuring different objects made of various parts. • b. Investigate how common items have parts that are too small to be seen without magnification

  5. Essential Questions • What is a chemical change? • What is a physical change? • How does an object equal the sum of its parts?

  6. Task • The students will use the liquid mixture in the baggie to create a change in state. • The students will use a banana and break it into parts to see if the sum of the parts equal the whole.

  7. Circumstance • The students will work in teacher assigned groups to perform the experiments. • They will use the lab sheets to record data and answer questions.

  8. GOAL • To discuss the states of matter and the terms relative to changes in state • To distinguish between chemical and physical changes

  9. Solid 1. Has a definite shape 2. Has a definite volume Phases of Matter

  10. Solid 3. Particles are tightly packed (can’t move or flow well) 4. Low energy Phases of Matter

  11. Solid 5. May be crystals with repeating patterns Ex: salt Phases of Matter

  12. Solid 6. Amorphous solids lose shape/flow like slow moving liquids Ex: candle wax, window glass, tar Phases of Matter

  13. Liquid 1. No definite shape- takes the shape of the container 2. Has a definite volume Phases of Matter

  14. Solid 3. Particles are packed loosely and flow slowly 4. Average energy Phases of Matter

  15. Liquid 5. Varying viscosities= resistance of a liquid to flow Honey has a high viscosity Phases of Matter

  16. Gas 1. No definite shape- takes shape of container 2. No definite volume Phases of Matter

  17. Gas 3. Particles are spread far apart- fill all spaces 4. Contantly moving and bumping into eachother 5. High energy Phases of Matter

  18. Gas 6. Particles can be squeezed in closer Bumping into eachother and walls causes pressure Phases of Matter

  19. Phase Website • Phases of matter at the molecular level

  20. Phase Summary Chart • Work with a partner to fill in the phase summary chart

  21. Phase Changes Matter such as water can change from phase to phase by adding or taking away heat energy Phase Changes

  22. Melting Solid to liquid Must take in heat energy M.P of water = 0 C or 32 F Phase Changes

  23. Examples of Melting

  24. Freezing Liquid to solid Must lose heat energy F.P of water = 0 C or 32 F Phase Changes

  25. Examples of Freezing

  26. Evaporation Liquid to gas Must gain heat energy B.P of water = 100 C or 212 F Phase Changes

  27. Examples of Evaporation

  28. Condensation Gas to liquid Must lose heat energy Phase Changes

  29. Examples of Condensation

  30. Sublimation Solid skips to gas Must gain a lot of heat energy Ex: Freezer Frost Dry Ice Cirrus Clouds Phase Changes

  31. Phase Change Website • Click here to view a phase change

  32. Phase Change Diagram

  33. Assessment • Determine what phase change is the opposite of evaporation. Explain

  34. Assessment • What type of phase change is seen in this picture? Explain what occurs during this phase change

  35. Physical Change Change in the appearance of a substance without changing its identity The atoms remain unchanged Physical and Chemical Changes

  36. Carving a baseball bat

  37. Dyeing your hair

  38. Smashing a rock

  39. Melting/Freezing water

  40. Boiling Water

  41. Sharpening a Pencil

  42. Chopping down a tree

  43. Spilled milk

  44. Crumpling paper

  45. Mowing the lawn

  46. Mixing ingredients

  47. Chemical Change A substance changes into a new and different substance The atoms are altered Often involves chemical rx Physical and Chemical Changes

  48. Leaves changing color

  49. Plant photosynthesis

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