EXAMPLE OF A CLIL ACTIVITY

Transcription

1 EXAMPLE OF A CLIL ACTIVITY SCAFFOLDING A CLIL ACTIVITY TITLE: THE TRIPLETS: THE STORY OF THREE PLASTIC BOTTLES SUBJECT: CHEMISTRY / CITIZENSHIP LEVEL: 4 ESO AUTHOR: OBJECTIVE: To raise students awareness on the effects of plastic (bottles) on the Earth Step 1 Brainstorming: What happens to the plastic bottles you use once they are empty and discarded? Scaffolding: Tapping on prior knowledge. Classifying. Worksheet 1 Step 2 Reading: Plastic characteristics. Scaffolding: Pre teaching concepts and vocabulary. Worksheet 2 (A and B) Step 3 Anticipating: dealing with vocabulary related to the video in Step 4 Scaffolding language: Word Search on waste vocabulary. Worksheet 3 Step 4 Watching a video: The life cycle of three plastic bottles by Emma Bryce Comprehension exercise. Worksheet 4 Scaffolding the process: Think Pair Share. Worksheet 5 Groups of three students. After watching the video each student sequences the journey of one bottle by a matching exercise with the process each bottle follows. They share, discuss and improve the results. They watch the video again to check the answers. FINAL TASK In groups, students decide the PROS and CONS of using plastic and find some solutions to prevent its harmful effects. Each group presents their findings in three slides to the rest of the class: one with the PROS, one with the CONS and one with some possible solutions to make a clever and responsible use of plastics. The contributed solutions are discussed and put in a blog for the rest of the school community. PROS CONS SOLUTIONS 1

2 WORKSHEET 1 Classifying MATERIAL OR MATTER? Plastics are so durable that they will not rot or decay (decompose) as quickly as natural products such as those made of wood do. As a result, they accumulate in the environment as waste for more than one thousand years which is a threat for human and animal life as well as for the environment. Look at the pictures below. Place their names next to them and decide whether this matter/material rots or decays or does not rot or decay. Add two more that you know about. wood garden trimmings or leaves plastic bags cigarrette buts apples cell phones paper or cardboard orange Rots Does Rots Name or not Name or decays rot decays or decay Does not rot or decay

3 WORKSHEET 2 (A) Reading PLASTIC CHARACTERISTICS Plastics are a family of organic compound (carbon atoms in their molecules) materials transformed primarily from natural substances or by synthesis. All plastics are polymers. The origin of plastic takes place in an oil refinery by chemically bonding oil and gas mollecules to get monomers. In turn, these monomers are bonded to form longer polymer chains to make plastic in form of millions of pellets that can be melted to be easily formed and moulded in many ways for many purposes. Organic materials come from once living organisms (fossils). From the point of view of urban collection, organic materials that are considered as such are scraps and vegetals, either from food or garden waste, that is, all things derived from live beings which rot quickly and can be used to produce compost. But, from a chemical point of view, organic materials are: Cardboard and paper Plastics Vegetal and other food scraps As the carbon compounds are organic and the properties of these materials ressemble in a way the substances of organic origin, that is, those that come from living beings such as wood, glass, paper, bones, vegetal resins, we say that plastics are organic compounds. Plastics have taken the place of traditional materials like woods and metals, even though they come fron non renewable resources. Non renewable resources cannot be replaced once they are all used up. That means that there is a finite quantity. They cannot be renewed or replenished. Renewable resources can be replaced, and will not run out (finish). A natural resource is renewable if it is replaced by natural processes. Due to its characteristics and properties, plastics have substituted many materials of natural origin and, even though they take million of years to desintegrate, we should remember that plastics can also be recycled. Text adapted from Everyday Materials and Science Plastics by Teresa Morató Images:

4 WORKSHEET 2 (B) Matching words and definitions Match the following characteristics of plastics with their definitions. Write a letter next to the corresponding number. 1 Organic compound a) Given a definite shape or form by different processes. 2 Natural substances b) Fossils (animals or vegetals) crude oil, natural gas and coal, 3 Synthesis c) Chains of the same molecular units, named monomers, repeated many times. 4 Polymers d) Refers to the combining of simple compounds called monomers to form something new. 5 Moulded e) Mainly formed by carbon and hyrogen but also containing in a lesser proportion, oxygen, nytrogen and other elements. 6 Pellets f) To undergo decomposition or decay 7 to rot g) Small particles typically created by compressing an original material

5 WORKSHEET 3 Word Search WASTE A landfill or a landfill site, also known as a dump or rubbish dump, is a place for the disposal of waste or not usable materials by burial. It may also refer to ground that has been filled with soil and rocks instead of waste materials There are many different words for waste, among others: trash, rubbish, garbage, refusal, litter, junk, scraps and debris Find the following words in the grid below: trash junk waste litter scraps residue garbage refusal debris leachate T O U U H B I O L T P S R E C Y C L E K R Y E P S E M J I V P A N R E S I D U E B N S A X T X B A X P H M H X R E P S C R A P S X O A D O M V E S I I O J G R N T P D A P L N U A T D E B R I S E S N R T R P S C O K I W K B R E L E A C H A T E A A T Q C X A R E A X G X T F E I W A S T E E W I O I P M N I O U A X L A S U F E R A E Images:

6 WORKSHEET 4 Multiple choice THE STORY OF THREE PLASTIC BOTTLES Comprehension exercise 1 Watch the video about plastic bottles once or twice and do the following multiple choice exercise: 1. The chains that ultimately form plastics are known as: a. Monomers b. Polymers c. Oil and gas molecules d. Plastic fibres 2. Leachate is produced as: a. Rainwater absorbs water soluble compounds and layers of trash. b. Plastic flows into ponds and streams. c. Toxic waste is emptied into ponds and streams d. Metal comes in contact with water. 3. Marine animals are impacted by ocean plastic because: a. It is full of toxins. b. It traps them, and when they eat it can starve them c. It takes up space in their natural habitat d. It kills their food, meaning they re left with nothing to eat 4. What s one way we can reduce plastics impact on the environment? a. By burying it b. By burning it c. By making it into small pieces d. By recycling it 5. Most plastics don t biodegrade: a. True b. False Image: 6

7 WORKSHEET 5 Put in the correct order THE STORY OF THREE PLASTIC BOTTLES Comprehension exercise 2 a. Form groups of 3 students (Student A, B and C) b. Each student follows the journey of one of he botlles (Bottle 1, 2 and 3) c. Watch the video again and number in the correct order (from 1 to 7) each step of the process the bottles follow. d. Share, discuss and improve your results with the other members of the group. e. Watch the video again and check the process each bottle follows. Bottle 1 Student A Bottle 2 Student B Bottle 3 Student C Rainwater flows through the waste It is carried to a landfill Leachate is created (a harmful substance) It is compressed with layers of other junk It absorbes the water, solluble compounds it contains 1000 years to decompose It goes to ground water, soil and streams It floats into a stream, into a river and into an ocean Trash accumulates into a garbage patch Plastic doesn t biodegrade and turns into small pieces called micro plastics It affects and kills animals A cloudy plastic soup is formed Plastic gyres are formed (5 plastic gyres in the world) Toxines pass onto the food chain A truck takes it to a recycling plant It is washed and melted It is squeezed and compressed into blocks It goes into a recycling container It is shredded into little pieces It is ready to be re used as something new It is transformed into raw material Image: 7