Globe Academy Science Department C2 and P2 GCSE Additional Science Homework Booklet Spring 1 Contents: Date Set. Feedback/ Marking.

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1 Globe Academy Science Department C2 and P2 GCSE Additional Science Homework Booklet Spring 1 Contents: Topic 1 Revision Questions on Chemistry 2 Oxides, Hydroxides and Ammonia 3 Electrolysis and Electroplating Revision Checklist for Assessment Week 4 Revision Date Set Date Due Feedback/ Marking 5 Forces 6 Power and Energy Look after this booklet. You will need to pay for a replacement. Name:

2 Dear Parents and Carers, Important Message for Parents and Carers The teachers of Globe Academy believe that Home Learning is an integral part of developing every student and ensuring that they reach their academic potential. Home Learning is important because it is point where school and home come together. It serves as a window through which you can observe your children s education and express positive attitudes towards your children about their education and progress. As children grow older, homework and the amount of time engaged in homework, increases in importance. For Globe Academy staff, homework is an opportunity to provide additional academic instruction and further extend your child s learning. The benefits of Home Learning for you and your child are as follows: (1) Practice and participation in home learning tasks can improve your child s achievement. (2) When homework is completed accurately and to a good standard, not only will your child s general knowledge and grades improve but your child will also increase their mastery of basic academic skills, such as reading, writing, spelling and mathematics, something Globe Academy is committed to. (3) Your child s ability to bring an assignment home, gather and organise necessary materials to complete the assignment, return the assignment and receive a level/grade, strengthens his or her sense of personal responsibility for their learning. (4) Time management skills are learned and developed. (5) Further, when homework proceeds smoothly it can become (4) a positive aspect of your relationship with your child. (6) Home Learning offers schools an opportunity to let parents know what their children are learning and keeps parents informed about work being studied and completed in class time. (7) Home Learning helps the Academy achieve their overall mission of improving your child s achievement. (8) Homework is the bridge that joins schools and parents. For parents there is the potential to gain a greater appreciation of your child s education and achievement.

3 For these valid reasons we are asking that parents/carers work with us to ensure that your child completes their homework. Your child will receive a homework booklet for each subject and we ask that all parents/carers ensure that the tasks in this booklet are completed on time and to a high standard. Together we can improve your child s progress and attainment. Please sign below to confirm your agreement to support Globe Academy by checking and ensuring your child completes their Home Learning Tasks each week. In addition please sign and comment if necessary, the Homework Record sheets also in this booklet. Thank you in advance for your support. Do not hesitate to contact me with any queries or comments about Home Learning at Globe Academy. Kind Regards Ms. C. Fernandes (Vice Principal) Name of Student: Learning Family: Name of Parent/Carer: I agree to ensure that my child completes all the Home Learning Tasks in this booklet on time and to a high standard. Signature of Parent/Carer: Date:

4 Home Learning Record After completing each Home Learning task please complete the record boxes below. Task Details: Student signature/comment: Deadline date: Parent signature/comment: Date completed: Teacher signature/comment: Task Details: Student signature/comment: Deadline date: Parent signature/comment: Date completed: Teacher signature/comment: Task Details: Student signature/comment: Deadline date: Parent signature/comment: Date completed: Teacher signature/comment:

5 Home Learning Record After completing each Home Learning task please complete the record boxes below. Task Details: Student signature/comment: Deadline date: Parent signature/comment: Date completed: Teacher signature/comment: Task Details: Student signature/comment: Deadline date: Parent signature/comment: Date completed: Teacher signature/comment: Task Details: Student signature/comment: Deadline date: Parent signature/comment: Date completed: Teacher signature/comment:

6 Homework 1: Chemistry Revision QUESTION PAGE: C3 C2 What are ionic and covalent bonds and when do they happen? Explain why metals are good conductors of electricity. Use the word delocalised in your answer. C1 Describe and explain the properties of simple molecular compounds. B1 A1 Describe and explain the properties of ionic compounds. Explain how to calculate the empirical formula of something. Explain using an example. A* Explain how to do the reacting masses calculation. Explain using an example.

7 ANSWER PAGE: C3 C2 C1 B1 A1 A*

8 Homework 2: Oxides, Hydroxides and Ammonia Use these general word equations to help you: Acid + metal oxide salt + water Acid +,metal hydroxide salt + water To name the salts, remember Nitric acid makes nitrate salts, hydrochloric acid makes chloride salts and sulfuric acid makes sulphate salts.

9 Hint: You ll need to use some of these symbols - H 2 O water H 2 hydrogen HCl hydrochloric acid CuOH copper hydroxide ZnO zinc oxide ZnOH zinc hydroxide NaSO 4 sodium sulfate

10 Homework 3: Electrolysis Read the information about the electrolysis of brine (salt water, also called sodium chloride solution) and then answer the questions carefully. Electrolysis of brine The process of electrolysis involves using an electric current to bring about a chemical change and make new chemicals. The electrolysis of salt water is a large-scale process used to manufacture chlorine from salt. Two other useful chemicals are obtained during the process, sodium hydroxide (NaOH) and hydrogen (H 2). Uses in industry Product chlorine Uses of the chemical disinfectant and purifier manufacture of hydrochloric acid making plastics sodium hydroxide processing food products removing pollutants from water manufacture of paper hydrogen manufacture of hydrochloric acid potential as a pollution-free fuel Environmental impacts of the electrolysis of brine on a large scale must be considered. The process uses a lot of electricity that is mainly produced by the burning of fossil fuels. During the actual process of electrolysis, metal must be in contact with the solution of brine. A metal commonly used is mercury which is toxic. Some mercury escapes into the solution and into the environment.

11 1. Match up the word with its meaning. Manufacturing Electrolysis Brine Large scale process Splitting up using electricity Making Salt water Chemical reactions happening in a big factory 2. Name three products made in the electrolysis of salt water and explain their uses. 3. Analyse the advantages and disadvantages of electrolysis of salt water. Use linking words from the box: However Whereas In contrast On the other hand Therefore Overall

12 Revision Checklist for Assessment Week Your assessment will be on Chemistry C2. Can you? Write formula for ionic compounds from given symbols and ionic charges Represent the electronic structure of ions in NaCl, MgO and CaCl 2 Represent covalent bonds as dot and cross diagrams in molecules like water, ammonia, hydrogen chloride, methane, oxygen AND giant structures like diamond and SiO 2 Represent covalent bonds as single lines in molecules like water, ammonia, hydrogen chloride, methane, oxygen AND giant structures like diamond and SiO 2 [HT] Draw a diagram to represent bonding in metals. Define a compound Describe the process of making ions to allow ionic bonding to happen Draw the ions made from Group 1 metals Draw the ions made from Group 7 elements Explain why ionic compounds can form giant ionic structures [HT] Explain why covalent compounds are often simple molecules Describe and explain the properties of giant covalent structures like diamond and SiO 2 [HT] Explain how delocalised electrons occur in metals Explain why simple molecules are gases, liquids or solids with low melting and boiling points. Understand that the intermolecular forces are overcome when a simple molecular substance melts or boils NOT the covalent bond! Explain why simple molecules do not conduct electricity. Explain why ionic compounds have high melting and boiling points. Explain how ionic compounds conduct electricity when molten or dissolved in water. Explain why giant covalent structures like diamond/graphite have very high melting points. Explain why the bonding in diamond allows it to be very hard. Explain why the bonding in graphite allows it to be soft and slippery. [HT] Explain how delocalised electrons allow graphite to conduct heat and electricity. [HT] Describe the uses of fullerenes [HT] Explain why the structure of metals allow them to conduct heat and electricity Explain why metals can be bent and shaped. State what an alloy is and explain why alloys are harder than pure metals (different sizes atoms) State what is unique about shape memory alloys that allows them to be used in dental braces Describe how properties of polymers depend on what they are made from and the conditions they were made under Explain why thermosetting polymers don t melt when heated, but thermosoftening do. Describe the sizes of nanoparticles in nm. List uses of nanoparticles due to the high surface area to volume ratio. Look at a graph and work out the rate of reaction from products forming. Describe the changing rate of a reaction by looking at a graph Evaluate the advantages and disadvantages of using catalysts in industry Can you calculate the rate of a reaction using this: Rate of reaction = Amount of reactant used or product formed Time Name 5 factors that would affect the rate of a reaction Describe collision theory in terms of particles and energy Recall the name of the energy needed to be overcome to start a reaction Explain how each factor would affect the rate of reaction using collision theory State what a catalyst is and what it does Revised?

13 Recall the masses and charges of protons, neutrons and electrons Remember that protons + neutrons = mass number Define the word isotope. Recall that the relative atomic mass of an element (Ar) compares the mass of atoms of the element with the 12C isotope. It is an average value for the isotopes of the element. The relative formula mass (Mr) of a compound is the sum of the relative atomic masses of the atoms in the numbers shown in the formula. State that the relative formula mass of a substance, in grams, is known as one mole of that substance Describe the benefits of using instrumental methods to detect and ID elements and compounds Describe how chemical analysis like paper chromatography allows us to ID additives in food like artificial colours. Describe how gas chromatography linked to mass spectroscopy (GC-MS) works and how it IDs the Mr of substances Calculate the percentage of an element within a compound [HT] Calculate the empirical formula of a compound from its mass or percentages. [HT] Calculate the masses of reactants or products from balanced symbol equations Calculate the percentage yield from a chemical reaction Calculate the atom economy of a reaction Represent a reversible reaction using a word equation State that when chemical reactions occur, energy is transferred to or from the surroundings. State what an exothermic reaction is in terms of energy and give examples. Define an endothermic reaction in terms of energy and give examples. Recall that if a reversible reaction is exothermic in one direction, it is endothermic in the opposite direction. Use the state symbols in equations - (s), (l), (g) and (aq). Describe how soluble salts can be made by reacting acids with metals, insoluble bases and alkalis Describe how salt solutions can be crystallised to produce solid salts. Insoluble salts can be made by mixing certain salts in solution (precipitate formed) Describe how precipitation can be used to remove unwanted ions from solutions, e.g. in treating water for drinking. Describe the difference between a base (metal oxides) and an alkali (metal hydroxides) Name the salts that HCl, HNO 3, H 2 SO 4 produce State that ammonia dissolves in water to produce an alkaline solution. It is used to produce ammonium salts, which are important as fertilisers. Recall that the ph scale is a measure of the acidity or alkalinity of a solution. Describe an acid as releasing H+ ions in solution. Describe an alkali as releasing OH- ions in solution. In neutralisation reactions, hydrogen ions react with hydroxide ions to produce water. Represent this reaction with the equation: H+(aq) + OH (aq) H2O(l) Describe what electrolysis is and what it does. State the type of compound that can be used as an electrolyte Explain why the electrolyte must been molten or in solution for electrolysis to work Describe which ions move to which electrode.

14 Explain what then happens to ions at that electrode, in terms of electrons. Describe how electrolysis is used to electroplate objects with copper or silver plating. Remember OIL RIG and describe what it means in terms of electrons Recall that if there s a mix of ions, the products formed depend on the reactivity of elements involved. [HT] Represent reactions at electrodes using half equations. For example: 2Cl Cl 2 + 2e or 2Cl 2e Cl 2 Describe how aluminium is manufactured by electrolysis Explain why cryolite is needed in the electrolysis of aluminium oxide. Explain why the carbon electrodes in the electrolysis of aluminium must be replaced often. Describe the details of the electrolysis of sodium chloride solution (brine) Explain why the products of brine electrolysis are useful reagents in the chemical industry particularly soap, bleach and plastics.

15 Homework 4: Revision Questions Once you have used your revision guide and checklist, have a go at these Chemistry questions.

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17 Homework 5: Forces Explain what you have learnt so far about forces using the success criteria. Grade Success Criteria D Give a definition for a force. C Name three forces and describe where they are found. B Describe what a resultant force is and what happens to an object if it is unbalanced. A Give the equation for relating force and extension for a spring. Explain how to use it and the units for each thing. A* Explain how to calculate the spring constant of a spring using a graph showing its extension at different forces.

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19 Homework 6: Work and Power Pick the 6 calculations to complete. You can choose to do easy, medium or hard. EASY MEDIUM HARD 1 Calculate the work done by a 47 N force pushing a pencil 0.26 m. 4 How much power does it take to lift 30 N 10m high in 5 s? 7 How much work can a 22 kw car engine do in 60. s if it is 100% efficient? 2 A car uses 2,500 Joules in 25 seconds. Find power. 5 You do 45 J of work in 3.0 seconds. How much power do you use? 8 If a small motor does 520. J of work to move a toy car 260 m, what force does it exert? 3 Calculate the work done by a 2.4 N force to move a sandwich across a table 0.75 m wide. 6 You use 35 J of energy to move a 7.0 N object. How far did you move it? 9 A 60 watt light bulb runs for 5.0 seconds. How much energy does it use? Question number: Answer Question number: Answer Question number: Answer Question number: Answer Question number: Answer Question number: Answer