1. Level 3 - 5to 6 marks Level 2 – 3 to 4 marks Level 1 – 1 to 2 marks Over time more synthetic polymers are being produced. Compare natural polymers with synthetic polymers and suggest reasons why new polymers are being created. 6 marks Key words Material Properties Polymer Natural Synthetic Rubber Wood Cotton Wool PVC Polythene Hints List some natural polymers and some synthetic polymers. Choose two examples where natural have been replaced by synthetic Explain why synthetic polymers may have better properties? Explain why natural polymers might be better for the environment? _____________________________________________ QWC - Bubbles Complex answer Extensive key words Logical order Excellent spelling, punctuation and grammar Detailed answer Many key words Clear order Good spelling, punctuation and grammar Simple answer Few key words No order Poor spelling, punctuation and grammar

2. Level 3 - 5to 6 marks Level 2 – 3 to 4 marks Level 1 – 1 to 2 marks Explain why chocolate would not be a suitable material to make a tea pot out of. Discuss the properties of chocolate which make it a poor choice and suggest an alternative material and reasons for your choice. 6 marks Key words Material Properties Polymer Natural Synthetic Ceramic Metal Mixture Flexible Book ref Pg 46/47 Hints What properties does a good teapot need? What are the properties of chocolate? Link its properties to the required properties of the teapot. Choose an alternative material. and say what properties it has. _____________________________________________ QWC - Bubbles Complex answer Extensive key words Logical order Excellent spelling, punctuation and grammar Detailed answer Many key words Clear order Good spelling, punctuation and grammar Simple answer Few key words No order Poor spelling, punctuation and grammar

3. Level 3 - 5to 6 marks Level 2 – 3 to 4 marks Level 1 – 1 to 2 marks Samples of abseiling rope were tested for their strength in tension and the following results were collected. 27546N, 27356N, 27598N, 27467N Calculate the mean and the range for this set of measurements. Explain why it is important to repeat an experiment. 6 marks Key words Mean Range Best estimate Repeat Reproduce Reliability Accuracy Test Strength Tension Flexible Hints Identify any outliers Calculate the mean Identify the highest and lowest values (range). Discuss the importance of repeating an experiment. Does your mean fall within your range? If not check again _____________________________________________ QWC - Bubbles Complex answer Extensive key words Logical order Excellent spelling, punctuation and grammar Detailed answer Many key words Clear order Good spelling, punctuation and grammar Simple answer Few key words No order Poor spelling, punctuation and grammar

4. Level 3 - 5to 6 marks Level 2 – 3 to 4 marks Level 1 – 1 to 2 marks Discuss the difference between uPVC and PVC. Consider the properties and link these properties to the structure of the polymer. 6 marks Key words Polymer chain Durable Poly-vinyl chloride Plasticiser Flexible Softer Harder Rigid Hints Identify differences in the properties of uPVC and PVC Identify the structure of the polymer chains. Link the uses of PVC and uPVC to the properties. Link the structure to the properties. _____________________________________________ QWC - Bubbles Complex answer Extensive key words Logical order Excellent spelling, punctuation and grammar Detailed answer Many key words Clear order Good spelling, punctuation and grammar Simple answer Few key words No order Poor spelling, punctuation and grammar

5. Level 3 - 5to 6 marks Level 2 – 3 to 4 marks Level 1 – 1 to 2 marks Discuss the difference between low density polythene (LDP) and high density polythene (HDP). Consider the properties and link these properties to the structure of the polymer. 6 marks Key words Polymer chain Durable polythene Branching Side branches Straight chains Crystalline Density Flexible Softer Harder Rigid Hints Identify differences in the properties of LDP and HDP Think about the different uses of LDP and HDP. Link the structure to the properties. Identify the structure of the polymer chains. _____________________________________________ QWC - Bubbles Complex answer Extensive key words Logical order Excellent spelling, punctuation and grammar Detailed answer Many key words Clear order Good spelling, punctuation and grammar Simple answer Few key words No order Poor spelling, punctuation and grammar

6. Level 3 - 5to 6 marks Level 2 – 3 to 4 marks Level 1 – 1 to 2 marks Most polymers are made from crude oil. Explain how fractional distillation separates crude oil into useful fractions. 6 marks Key words Crude oil Hydrocarbon Fractionating tower Distillation Mixture Separate Weak forces Strong forces Long chains Short chains Hints Give a definition of crude oil Explain how the fractional distillation column works. Why is it important to separate the chains? How are the chains separated. _____________________________________________ QWC - Bubbles Complex answer Extensive key words Logical order Excellent spelling, punctuation and grammar Detailed answer Many key words Clear order Good spelling, punctuation and grammar Simple answer Few key words No order Poor spelling, punctuation and grammar

7. Level 3 - 5to 6 marks Level 2 – 3 to 4 marks Level 1 – 1 to 2 marks Nanotechnology is becoming more commonly used in everyday materials. Discuss the use of nanotechnology and the potential risks. Explain why some people are concerned about the possible effects of nanotechnology in the future. 6 marks Key words Nanotechnology Nanoparticles Surface area Nanometre Silver Medicine Sunscreen Carbon fibre Sports equipment Electronic paper UV protection Self cleaning Bloodstream toxic Hints Give a definition of nanotechnology Identify some uses of nanotechnology Do risks outweigh benefits? Identify some risks of nanotechnology _____________________________________________ QWC - Bubbles Complex answer Extensive key words Logical order Excellent spelling, punctuation and grammar Detailed answer Many key words Clear order Good spelling, punctuation and grammar Simple answer Few key words No order Poor spelling, punctuation and grammar

8. Level 3 - 5to 6 marks Level 2 – 3 to 4 marks Level 1 – 1 to 2 marks PVC is a polymer can be used for a range of materials because its properties can be altered by the use of plasticisers. Consider within a bathroom there could be 3 uses of PVC : The shower curtain, the window frame, and the flooring. Discuss which material will have the most plasticiser and why. 6 marks Key words Polymer Monomer Polyvinyl chloride Plasticiser Long chain Flexible Rigid Durable Forces Hints Describe PVC and the term polymer. Explain the term plasticiser and how it alters the structure of the polymer. Identify which material requires the most plasticiser. Describe the properties needed for the different materials _____________________________________________ QWC - Bubbles Complex answer Extensive key words Logical order Excellent spelling, punctuation and grammar Detailed answer Many key words Clear order Good spelling, punctuation and grammar Simple answer Few key words No order Poor spelling, punctuation and grammar

9. Level 3 - 5to 6 marks Level 2 – 3 to 4 marks Level 1 – 1 to 2 marks High Density Polythene (HDP) is slightly denser than the Low Density Polythene (LDP) even though they have the same chemical composition. Explain why HDP is more dense than LDP because of the structure and arrangement of the molecules. 6 marks Key words Density Mass Volume Properties Polymer Crystalline Straight Branched Hints Explain the term density and link it to the properties of HDP. Describe the structure and arrangement of the chains in HDP Link the structure to density. Describe the structure and arrangement of the chains in LDP _____________________________________________ QWC - Bubbles Complex answer Extensive key words Logical order Excellent spelling, punctuation and grammar Detailed answer Many key words Clear order Good spelling, punctuation and grammar Simple answer Few key words No order Poor spelling, punctuation and grammar

10. Level 3 - 5to 6 marks Level 2 – 3 to 4 marks Level 1 – 1 to 2 marks Explain how you could plan an investigation to measure the tensile strength of samples of different types of rubber. Give a brief method and justify your choice of equipment. List the factors you need to control and consider how you will ensure the data you collect is reliable. 6 marks Key words Method Factor Stretch Control Tensile Strength Reliability Repeat Best estimate Hazard Hints Describe the term tensile strength Write a short method Say how you will make it reliable. Consider all the factors which might affect the investigation. _____________________________________________ QWC - Bubbles Complex answer Extensive key words Logical order Excellent spelling, punctuation and grammar Detailed answer Many key words Clear order Good spelling, punctuation and grammar Simple answer Few key words No order Poor spelling, punctuation and grammar

11. Level 3 - 5to 6 marks Level 2 – 3 to 4 marks Level 1 – 1 to 2 marks Two rulers are made from different plastics. Ruler 1 bends easily and springs back into shape, and softens when heated. Ruler 2 snaps easily and turns black when heated. Describe the difference between the structure of the polymers to explain the difference in properties. 6 marks Key words Density Crystallinity Polymer Forces Cross links Heating Hard Flexible Rigid Soft Hints Describe the arrangement of the polymers in ruler 1 Describe the arrangement of the polymers in ruler 2 Identify the reasons for the difference in properties Identify the differences between the two. _____________________________________________ QWC - Bubbles Complex answer Extensive key words Logical order Excellent spelling, punctuation and grammar Detailed answer Many key words Clear order Good spelling, punctuation and grammar Simple answer Few key words No order Poor spelling, punctuation and grammar

12. Level 3 - 5to 6 marks Level 2 – 3 to 4 marks Level 1 – 1 to 2 marks Use the diagram to explain the term polymerisation. 6 marks Key words Monomer Polymer Polymerisation Short Long Hydrocarbon Length Reaction Repeating unit Temperature Pressure Reaction Hints Identify which is a monomer and which is a polymer Describe the difference between a monomer and polymer How are the properties of a polymer different o that of a monomer. Explain the structure of a polymer _____________________________________________ QWC - Bubbles Complex answer Extensive key words Logical order Excellent spelling, punctuation and grammar Detailed answer Many key words Clear order Good spelling, punctuation and grammar Simple answer Few key words No order Poor spelling, punctuation and grammar

13. TIPS FOR ANSWERING LONGER ANSWER QUESTIONS Which command word is used? These tell you what to do. Explain, Describe, Discuss, Compare Check you know what they all mean. Underline or circle key words Explain why the amount of fertiliser used is increasing, and describe the damage that fertilisers can cause to life in rivers and lakes. What key words might be needed to answer the question? Write them down. Make sure you know what they mean. Organise them, either in groups, or in an order. How many marks is it worth? Have you written enough?

14. More KEY WORDS! Check your answer... Level 3 5-6 marks 1.Have you used any of the key words? 2.Have you made some key points? Level 0 0 marks No Yes 1.Have you used lots of the key words? 2.Have you fully described any of the key points? 3.Is there a logical order? Level 1 1-2 marks No Yes 1.Have you used all the key words correctly? 2.Have you justified your conclusion using correct science? 3.Is your spelling faultless and your report logical? Level 2 3-4 marks No Yes More KEY WORDS? Check the ORDER? Think more SCIENCE! More DETAIL! Check your SPELLING!

15. Command Words Calculate – work out a number. Use a calculator, show your working. Compare – write about ways in which two things are the same, and how they are different. Describe – write a detailed answer that covers what happens, when it happens and where it happens. Your answer must include facts or characteristics. Discuss – write about the issues linked to a topic. You many need to give arguments for and against something, or show differences between ideas, opinions and facts. Estimate – suggest a rough value without doing a calculation. BE CAREFUL – Calculate a best estimate = calculate an average include your calculations Explain – write a detailed answer that says how and why things happen. Evaluate – use the provided facts, data or information. Write about these and give your own opinion/conclusion. Justify – give some evidence or an explanation to support why you gave that answer. Outline – give the key facts, such as in a process give the steps in a correct order. Predict – look at data and suggest a value or result. Use patterns and trends to support your answer. Show – give each step you took in a calculation, write it down clearly. Suggest – use your science knowledge in a new situation to come up with a reasonable answer.