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Math Tuition Singapore Secondary Math Tuition – Number Sequences and Problem Solving     Please contact Angie @ 96790479 or Mr Ong @ 98639633 if you need Secondary Math Tuition Singapore Mathematics Tuition

Biology Tuition Singapore Secondary Science Tuition – Transport of Living Things – Diffusion   MOVEMENT OF SUBSTANCES   Diffusion Diffusion is the movement of any substance from its region of higher concentration to its region of lower concentration. It is a passive transport as energy is not required for the movement of the substance.   Diffusion in living things In living organisms, many organs have specialised features to improve the efficiency of diffusion of materials. These specialised features are mainly developed to increase the surface area so that they can carry out their functions more efficiently. Some examples of important diffusion of substances in living things: Gases exchange between the lungs and blood capillaries Absorption of simple food substa ...

Physics Tuition Singapore Secondary Science Tuition – Electricity Chemical Effect   Chemical effect A chemical change caused by electricity is called electrolysis An electrolyte is a liquid or a solution which can conduct electricity. The electrolyte undergoes chemical change when electricity passes through it. Electrodes are electrical contacts which allows electric current to leave and to enter the electrolyte. Electrolysis is widely used in electroplating and in the extraction of metals.   Electroplating In electroplating, an object is coated with a layer of metal. The object to be coated is connected to the negative terminal of the power supply. The metal to coat an object is connected to the positive terminal of the power supply.   The purpose for electroplating a ...

Chemistry Tuition Singapore Secondary Science Tuition – Acids and Bases   ACIDS The common acids found in the laboratory or in fruits/foods are as follows Strong Acids – Hydrochloric acid– Sulfuric acid-Nitric acid Weak Acids – Citric acid (in citrus fruits such as oranges and lemons)-Ethanoic acid (in vinegar)-Malic acid (in apples)   Properties of acids All acids, either strong or weak, have the following properties: Sour taste Able to conduct electricity Corrosive if concentrated -Able to turn blue litmus paper red -Able to react with metals, carbonate compounds and alkalis   Reaction with metals The reaction between metals and acids produce salts and hydrogen gas   Reaction with carbonates Acids react with carbonate compounds to produce salts ...

Economics Tuition Singapore A Level H2 H1 Economics Tuition – Essay Model Answer   Spending by Singapore-based MasterCard cardholders increased 12.4 percent to USD797.4 million in the first month of the Great Singapore Sale (GSS) this year (31 May to 30 June 2013) compared to the same period last year. (a) Explain the likely causes for the increase in consumer spending in Singapore in recent years. [10] (b) Discuss whether increasing consumption expenditure in Singapore is desirable for the economy. [15] SUGGESTED ANSWER Explain what consumption is: Consumption refers to expenditure by households on goods and services. Consumption can be induced by income changes (induced consumption) or influenced by non-income factors (autonomous consumption). A change in any one of the determ ...