1 / 26

Physical and Chemical Changes

Physical and Chemical Changes. Physical Changes. No new substance is formed Indicators: size and shape change, phase change, mixture, dissolving. Chemical Changes. New substance formed from original substances that lose their original properties.

heba
Télécharger la présentation

Physical and Chemical Changes

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Physical and Chemical Changes

  2. Physical Changes • No new substance is formed • Indicators: size and shape change, phase change, mixture, dissolving

  3. Chemical Changes • New substance formed from original substances that lose their original properties Hydrogen is a flammable gas that combines with…

  4. Oxygen to produce… A gas that is essential for life and for combustion to occur.

  5. the compound water which is a colorless liquid that is not flammable and doesn’t support combustion

  6. Indicators of a chemical change: • Produce gas • Produce heat and light

  7. More indicators of a chemical change include Burning • Producing a solid • Temperature change • Oxidation • Odor Oxidation Rusting

  8. and also a color change may indicate a chemical change

  9. Physical or Chemical • Get ready to decide if the following examples are chemical changes or physical changes.

  10. Example 1- chemical or physical change? Raindrops become snowflakes

  11. Example 2-Apple starts to turn brownChemical or Physical Change?

  12. Example 3- Chemical or Physical Change? Alkaseltzer tablet in water

  13. Example 4-Bicycle rusts

  14. Example 5- Butter melts –Chemical or Physical?

  15. Example 6-Chemical or Physical • Acid on limestone White Cliffs of Dover chalk

  16. Example 7-Chemical or Physical Change? Cream is whipped

  17. Example 8-Chemical or Physical Change? Dynamite Explodes

  18. Example 9-Chemical or Physical Change? Cell phone battery

  19. Example 10-Chemical or Physical Change? Lemonade powder is mixed into water

  20. 1-Physical-Raindrops become water. Substance is still water. Went through phase change of liquid to solid 2-Chemical-Apple turns brown is evidence of a color change 3-Chemical-Alkaseltzer in water produces a gas called carbon dioxide. There is also a temp. change 4-Chemical-Bicycle rusting is oxidation because the metal united with oxygen in the air. Answers

  21. More Answers • 5-Physical-Butter melting is a phase change from a solid butter pat to a liquid. • 6-Chemical-Acid on limestone produces a gas • 7-Physical-Cream is whipped. This is a mixture of air and cream. • 8-Chemical-dynamite explodes and produces heat and light. • 9-Chemical-Cell phone battery produces heat and light • 10-Physical-Lemonade powder mixes and dissolves in water.

  22. Girls Only- Guess These • Chemical or Physical • 1. Fireworks explode • 2.Grass is mowed • 3.Hair is bleached • 4.Iron gets magnetized • 5.Ice cream melts

  23. Boys Only-Guess These • Chemical or Physical change? • 1.Jello hardens in the fridge • 2.Your lunch digests • 3.Lightening bug glows • 4.Log decomposes • 5.Pine bark is made into mulch

  24. Who was the best?

  25. Answers • Girls • 1-C • 2-P • 3-C • 4-P • 5-P • Boys • 1.-P • 2.-C • 3.-C • 4.-C • 5.-P

  26. The End

More Related