Recomendados
Recomendados
Más contenido relacionado
Similar a CLIL Glycerine and Bubbles(Chemistry) M4
Similar a CLIL Glycerine and Bubbles(Chemistry) M4 (20)
Más de Tharinee Japhimai
Más de Tharinee Japhimai (17)
CLIL Glycerine and Bubbles(Chemistry) M4
- 1. Chapter 4 Grouping and Changing Materials Glycerine and Bubbles Matthayomsuksa 1
- 4. liquid (n.) a substance that is not a solid or a gas Ex. Water and milk are liquids.
- 5. colorless (adj.) having no color Ex. Glycerine is colorless and sweet tasting.
- 6. dissolve (v.) become part of liquid Ex. Glycerine can be dissolved easily.
- 7. surface (n.) the outside or top layer of something Ex. The glycerine in the bubble mixture will stay right at the soap film surface.
- 8. evaporate (v.) to change into vapor Ex. Water is continuously evaporating from a soap bubble.
- 9. supple (adj.) bending and moving easily and gracefully Ex. It is said that the glycerine makes a soap film supple.
- 10. Adverb 1. In most cases, an adverb is formed by adding '-ly' to an adjective: Adjective Adverb cheap quick slow cheaply quickly slowly Examples: Time goes quickly. He walked slowly to the door. She certainly had an interesting life. He carefully picked up the sleeping child.
- 11. Rules If the adjective ends in '-y', replace the 'y' with 'i' and add '-ly': Adjective Adverb easy angry happy lucky easily angrily happily luckily If the adjective ends in -'able', '-ible', or '-le', replace the '-e' with '-y': Adjective Adverb probable terrible gentle probably terribly gently
- 12. If the adjective ends in '-ic', add '-ally': Adjective Adverb basic economic tragic basically economically tragically
- 13. What is glycerine? Glycerine is a thick liquid that is colorless and sweet tasting. It has a high boiling point and freezes to a paste. Glycerine's most common use is in soap and other beauty products like lotions, though it is also used, in the form of nitroglycerin, to create dynamite. Glycerine can be dissolved easily into alcohol and water but not into oils. Glycerine and Bubbles Glycerine in soap bubble mixtures Most good soap bubble recipes mention glycerine. The Glycerine (or glycerol) improves the soap bubble mixture in two ways: It increases the lifetime of the bubbles, and it makes the bubbles suppler.
- 14. Glycerine increases the lifetime of the bubbles Water is continuously evaporating from a soap bubble. As a result of this process the soap film becomes thinner and thinner until it breaks. The glycerine in the bubble mixture will stay right at the soap film surface, and will therefore reduce the number of water molecules at the surface. As a result the evaporation will be slower in a soap film with glycerine, because it is always water from the surface that disappears from the soap film during the evaporation process. The glycerine molecules attract water molecules and form weak chemical bonds, the so-called hydrogen bonds. These bonds make it more difficult for the water molecules to leave the surface. One can say that it gets more difficult for the water to evaporate, since the glycerine is pulling the water back into the soap film. For these reasons soap bubbles will generally have a longer life span if they contain glycerine.
- 15. Right: Soap film with glycerine. The glycerin is positioned at the surface of the film and thereby inhibits the evaporation of water. Glycerine makes the soap films suppler It is said that the glycerine makes a soap film suppler, more flexible. The explanation is supposedly that the glycerine molecules will go in-between the soap molecules. When the film is bending, the long (and charged) soap molecules will move around the smaller glycerine molecules instead of moving around other big (and charged) soap molecules. This gives that soap molecules more freedom of movement and therefore makes the film more flexible. According to many soap bubble recipes, the bubble mixture should be prepared hours before use. An explanation for this could be that the glycerine needs time to become packed in-between the soap molecules. Left: Soap film without glycerine. The film only contains water and soap molecules. The evaporation of water from the film is relatively large.
- 16. The best bubbles in the world! Equipment -washing-up liquid -water -glycerine -containers -wands Directions -Get into a group of 3 people. -Bring out the equipment and go to your group. -Do an experiment according to the process below.
- 17. Process 1. Mix washing-up liquid and water in each container. Container 1: 40 per cent washing-up liquid Container 2: 30 per cent washing-up liquid Container 3: 20 per cent washing-up liquid Container 4: 10 per cent washing-up liquid 2. Add glycerine into each container. Describe properties of glycerine …………………………………………………………………………………………………………… …………………………………………………………………………………………………………… …………………………………………………………………………………………………………... 3. Blow the four wands and notice the bubbles.
- 18. Use each of the four containers and try to blow four bubbles each time. When the bubbles work, tick a box for that container. If the bubbles don’t work, put a cross.