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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 parts of animal and plant cells and their functions, compare the two cell types, and describe how cells are organised into tissues, organs and systems3Q&A pairs
- Describe diffusion and osmosis, explain how they move substances across cell membranes, and predict the effect of osmosis on plant and animal cells4Q&A pairs
- Describe the human digestive system, explain why large food molecules must be digested, and outline how digested food is absorbed in the small intestine2Q&A pairs
- Describe the role of the heart, blood vessels and blood in transport, compare arteries, veins and capillaries, and state the functions of the main blood components2Q&A pairs
Biology: Genetics and Ecology
- Describe chromosomes, genes and DNA, explain dominant and recessive alleles, and use a genetic diagram to predict the offspring of a simple cross2Q&A pairs
- Describe food chains and food webs, explain the roles of producers, consumers and decomposers, and account for energy loss along a chain3Q&A pairs
- Describe how human activities such as pollution and deforestation affect the environment, and outline ways to conserve resources and reduce harm0Q&A pairs
Biology: Plants and Nutrition
- Describe enzymes as biological catalysts, explain how they speed up reactions, and describe the effect of temperature and pH on enzyme activity1Q&A pairs
- List the main nutrient groups and their functions, describe a balanced diet, and carry out the food tests for starch, glucose, protein and fat3Q&A pairs
- State the word equation for photosynthesis, describe the conditions it needs, and explain how the leaf is adapted to carry it out1Q&A pairs
Chemistry: Atoms, Bonding and the Mole
- Describe the structure of the atom in terms of protons, neutrons and electrons, work out proton number and nucleon number, and explain how elements are arranged in the periodic table3Q&A pairs
- Explain why atoms form bonds, describe ionic bonding as the transfer of electrons and covalent bonding as the sharing of electrons, and relate bonding to simple properties2Q&A pairs
- Describe the three states of matter using the particle model, explain changes of state, and choose suitable methods to separate mixtures2Q&A pairs
- Define relative atomic mass and the mole, calculate relative formula mass, and find the number of moles from a given mass5Q&A pairs
Chemistry: Metals and Organic Chemistry
- Describe crude oil as a source of fuels, recognise alkanes as a family of hydrocarbons, and write the products of complete and incomplete combustion3Q&A pairs
- State the composition of clean air, name common air pollutants and their sources and effects, and describe the greenhouse effect3Q&A pairs
- Place metals in order of reactivity from their reactions, use displacement reactions, and relate reactivity to the method used to extract a metal2Q&A pairs
Chemistry: Reactions, Acids and Salts
- Describe the properties of acids and bases, use the pH scale and indicators, and write the products of acid reactions with metals, bases and carbonates2Q&A pairs
- Recognise the signs of a chemical reaction, balance simple word and symbol equations, and classify reactions as exothermic or endothermic2Q&A pairs
- Describe what a salt is, distinguish soluble and insoluble salts, and outline the preparation of a soluble salt from an acid and an insoluble base1Q&A pairs
Physics: Measurement, Forces and Energy
- Describe the effects of forces, distinguish mass from weight, and apply the relationship force equals mass times acceleration to simple situations0Q&A pairs
- Describe the SI base quantities and their units, choose suitable instruments to measure length, volume, mass and time, and read those instruments to the correct precision3Q&A pairs
- Define speed and acceleration, calculate them from distance and time, and interpret distance-time and speed-time graphs4Q&A pairs
- Describe the main stores of energy and the principle of conservation of energy, and calculate work done, kinetic energy, gravitational potential energy and power4Q&A pairs
Physics: Waves, Electricity and Magnetism
- Define current, voltage and resistance, apply Ohm's law, and describe how current and voltage behave in series and parallel circuits3Q&A pairs
- Describe reflection and refraction of light, recall the regions and uses of the electromagnetic spectrum, and apply the law of reflection3Q&A pairs
- Describe the properties of magnets and magnetic fields, explain how an electromagnet works, and state how its strength can be increased4Q&A pairs
- Describe waves using frequency, wavelength and amplitude, apply the wave equation, and explain how sound travels as a wave that needs a medium1Q&A pairs