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PPT - CBI by Aphithak Chanla
The document discusses energy sources from plants. It provides examples of how scientists are investigating fast-growing plants like water hyacinth that can be used to produce renewable fuel. The energy from green plants is the most important of all energy sources from plants because it is renewable and costs nothing to produce.
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PPT - CBI by Aphithak Chanla
- 3. What kind ofenergy source do you see in this song?
- 11. Positive Compar Superlati ative ve cold colder coldest hot hotter hottest big bigger biggest warm warmer warmest large larger largest expensiv more the most e expensive expensive
- 12. Here are someirregular adjectives. Positiv Compa Superla e rative tive good better best bad worse worst little less lest many more most
- 13. Comparative form (a) Short adjectives With short adjectives, we make comparative form by adding –er to the stem. comparative comparative The cheaper plates The cheaper plates are over there are over there
- 14. (b) Long adjectives Withlong adjectives, we put more before the adjective. It’scomparativeexpensive to more expensive to It’scomparative more travel on Friday travel on Friday comparative comparative It’s more dangerous on the It’s more dangerous on the southern slope southern slope
- 15. Superlative form (a)Short adjectives For thesuperlative form, we add –est to the stem. Rutland was the Rutland was the smallest county in smallest county in Britain. Britain. Superlative
- 16. (b)Long adjectives With longadjectives we put most before the adjective. Superlative Superlative Who is the most beautiful Who is the most beautiful girl in the world? girl in the world? Rory Underwood is England’s Rory Underwood is England’s most successful rugby player most successful rugby player Superlative
- 17. Listening Listening Reading Reading Speaking Speaking Writing Writing
- 18. Activity 1 Listen “Theenergy from plants” and circle T (true) or F (false). For the sentences you marked false, give the correct information.
- 20. The scientists havenever The scientists have never begun to investigate fuel begun to investigate fuel producing plants. producing plants. The energy from plants is The energy from plants is renewable. renewable. The energy which green The energy which green plants supply is useless. plants supply is useless.
- 21. Scientists have always Scientists have always been interested in plants been interested in plants which produce food like which produce food like grain or fruit. grain or fruit. Water hyacinth is fast- Water hyacinth is fast- growing weed which growing weed which grows in brackish water. grows in brackish water.
- 22.
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- 24. Activity 2 Read thetext and answer the questions. What does the reference word refer to?
- 26. 1.It’s not difficultto 1.It’s not difficult to see…..(line 2) see…..(line 2) Green plants Green plants
- 27. 2. It isrenewable. 2. It is renewable. (line 5) (line 5) Green plants Green plants
- 28. 3. They arelooking 3. They are looking at quick-growing….. at quick-growing….. (line 18) (line 18) Scientists Scientists
- 29. 4. It costsnothing to 4. It costs nothing to produce. (line 4) produce. (line 4) Green plants Green plants
- 30. 5. But, most 5. But, most important of all.(line important of all.(line 4) 4) Plants Plants
- 31. Activity 3 Thinkof energy source from plants that you know and present in front of the class.
- 32. Example Corn israw material to produce ethanol. It’s not expensive. Moreover, we use corn cob to produce electricity energy.
- 34. Activity 4 Complete each sentencewith a comparison.
- 35. 1. Scientists havehelped 1. Scientists have helped framers to produce _______ framers larger larger larger to produce _______ larger and ________ crops from and ________ crops from these plants. (large) these plants. (large)
- 36. 2. Breeding newplants 2. Breeding new plants whish produce ______heavier crops whish produce ______heavier crops and which resist disease and which resist disease better better ______ .. (heavy, good) ______ (heavy, good)
- 37. 3. Giant keptis one of the 3. Giant kept is one of the fastest world’s world’s fastest ______ -growing plants. (fast) ______ -growing plants. (fast)
- 38. 4. It wasnever a pleasant 4. It was never a pleasant beach, but the oil beach, but the oil dirtier dirtier made it _______. (dirty) made it _______. (dirty)
- 39. 5. Today weuse ______ 5. Today more use ______ we more electric energy than electric energy than energy from plants. (many) energy from plants. (many)
- 40. 6. Energy fromcoal is the 6. Energy from coal is the most expensive most expensive ____________(expensive) ____________(expensive)
- 41. 7. Water hyacinthis a ______ 7. Water hyacinth is a ______ growing in growing in faster faster fresh water than sugar fresh water than sugar cane. (fast) cane. (fast)
- 42. 8. The energyfrom green 8. The energy from green plant the __________important plant the __________ most important most of all energy from plant. of all energy from plant. (important) (important)