Back to Singapore Combined Science
Singapore · SEABQ&A
Combined ScienceQ&A by dot point
A short Q&A bank for every Singapore Combined Science syllabus dot point. Each question and answer is drawn directly from our worked dot-point page, so you can scan key concepts before opening the long-form answer.
Biology: Cells and Human Physiology
- Identify the structures of animal and plant cells and their functions, compare the two cell types, and describe the organisation of cells into tissues, organs and systems6Q&A pairs
- Describe and compare diffusion, osmosis and active transport, and explain their importance in living organisms6Q&A pairs
- Compare aerobic and anaerobic respiration, describe the role of breathing and gas exchange in the lungs, and relate respiration to energy release5Q&A pairs
- Describe the human digestive system, the role of digestive enzymes in breaking down food, and the absorption of digested food in the small intestine7Q&A pairs
- Describe the human circulatory system including the structure of the heart, the blood vessels and the components of blood and their functions5Q&A pairs
Biology: Genetics and Ecology
- Describe the structure and role of DNA, genes and chromosomes, and compare mitosis and meiosis as types of cell division5Q&A pairs
- Describe the flow of energy through food chains and food webs, explain why food chains are short, and outline the carbon cycle5Q&A pairs
- Describe the effects of human activity on the environment including pollution, the enhanced greenhouse effect and deforestation, and outline ways to reduce the impact6Q&A pairs
- Use the terms gene, allele, dominant, recessive, genotype and phenotype to explain monohybrid inheritance, and use genetic diagrams to predict the offspring of a cross4Q&A pairs
Biology: Plants and Nutrition
- Describe enzymes as biological catalysts, explain the lock and key model and enzyme specificity, and describe the effects of temperature and pH on enzyme activity4Q&A pairs
- Describe the nutrients needed in a balanced human diet, the function and food sources of each, and the use of food tests to identify nutrients5Q&A pairs
- Describe photosynthesis as the process that makes glucose using light energy, state its equation and limiting factors, and relate leaf structure to its function5Q&A pairs
- Describe the roles of xylem and phloem, explain the uptake and transport of water and transpiration, and state the factors affecting the rate of transpiration7Q&A pairs
Chemistry: Atoms, Bonding and the Mole
- Describe the structure of the atom, define proton number and nucleon number and isotopes, and relate electronic configuration to the position of an element in the periodic table5Q&A pairs
- Describe ionic and covalent bonding in terms of electron transfer and sharing, and relate bonding to the properties of ionic compounds and simple molecules7Q&A pairs
- Describe the arrangement and motion of particles in solids, liquids and gases, and explain changes of state, diffusion and the kinetic particle theory5Q&A pairs
- Define relative atomic and molecular mass and the mole, and use moles to calculate reacting masses and amounts from balanced equations6Q&A pairs
Chemistry: Metals and Organic Chemistry
- Describe the alcohols and carboxylic acids as homologous series, including the production and reactions of ethanol and ethanoic acid and the formation of esters5Q&A pairs
- Describe alkanes and alkenes as homologous series, compare their bonding and reactions, and use the bromine test to distinguish saturated from unsaturated hydrocarbons7Q&A pairs
- Relate the method of extracting a metal to its position in the reactivity series, describing reduction of iron in the blast furnace and extraction of aluminium by electrolysis4Q&A pairs
- Place metals in order of reactivity from their reactions with water, acids and oxygen, and use the reactivity series to predict displacement reactions6Q&A pairs
Chemistry: Reactions, Acids and Salts
- Describe the properties of acids and bases in terms of hydrogen and hydroxide ions, classify oxides, and use the pH scale and indicators to measure acidity and alkalinity4Q&A pairs
- Describe exothermic and endothermic reactions in terms of temperature change and bond breaking and forming, and interpret simple energy level diagrams5Q&A pairs
- Describe and explain the effects of concentration, temperature, surface area and catalysts on the rate of reaction using collision theory8Q&A pairs
- Describe the characteristic reactions of acids with metals, bases and carbonates, and explain neutralisation in terms of hydrogen and hydroxide ions8Q&A pairs
- Describe the preparation of soluble and insoluble salts by titration, excess solid and precipitation, using the solubility rules to select the method7Q&A pairs
Physics: Measurement, Forces and Energy
- State the principle of conservation of energy, describe energy stores and transfers, and apply the equations for work, kinetic and potential energy, power and efficiency5Q&A pairs
- Describe speed, velocity and acceleration, interpret distance-time and speed-time graphs, and apply Newton's laws and the equation F = ma to simple situations4Q&A pairs
- Define the moment of a force and apply the principle of moments, and define pressure and apply p = F/A including pressure in liquids7Q&A pairs
- State the SI base quantities and units, use common prefixes, distinguish scalars and vectors, and select suitable instruments to measure length, time and other quantities4Q&A pairs
Physics: Waves, Electricity and Magnetism
- Define current, potential difference and resistance, apply Ohm's law V = IR, and analyse series and parallel circuits and electrical power6Q&A pairs
- Describe transverse and longitudinal waves and the wave equation, and apply the laws of reflection and refraction of light7Q&A pairs
- Describe magnetic fields and the magnetic effect of a current, and explain electromagnets, the motor effect and electromagnetic induction5Q&A pairs
- Distinguish temperature and thermal energy, describe conduction, convection and radiation, and explain melting and boiling using the particle model6Q&A pairs