📚 Year 10 CCEA Science: Core Concepts Review | Year 10 CCEA 科学：核心知识点梳理
As a Year 10 student following the CCEA GCSE Science specification, mastering the core concepts across Biology, Chemistry and Physics is essential for success. This article provides a concise yet comprehensive review of the key topics you will encounter, helping you consolidate your understanding and prepare for assessments.
作为学习 CCEA GCSE 科学课程的 Year 10 学生，掌握生物、化学和物理的核心概念至关重要。本文将对主要知识点进行简明而全面的梳理，帮助你巩固理解并做好评估准备。
1. Cell Biology | 细胞生物学
All living organisms are composed of cells. Animal cells typically contain a nucleus, cytoplasm, cell membrane, mitochondria and ribosomes. Plant cells have the same organelles plus a rigid cell wall, chloroplasts for photosynthesis and a large permanent vacuole filled with cell sap.
所有生物体都由细胞组成。动物细胞通常含有细胞核、细胞质、细胞膜、线粒体和核糖体。植物细胞除了这些细胞器外，还有坚硬的细胞壁、进行光合作用的叶绿体以及充满细胞液的中央大液泡。
Specialised cells are adapted to carry out specific functions. For instance, sperm cells have a tail for movement and many mitochondria for energy; root hair cells have a large surface area to absorb water and minerals efficiently.
特化细胞经过适应以完成特定功能。例如，精细胞具有用于运动的尾部以及大量提供能量的线粒体；根毛细胞具有较大的表面积，以便高效地吸收水分和矿物质。
magnification. The formula for magnification is: Magnification = Image size ÷ Actual size.
使用光学显微镜时，总放大倍数等于目镜放大倍数乘以物镜放大倍数。放大倍数的计算公式为：放大倍数 = 图像尺寸 ÷ 实际尺寸。
Diffusion is the net movement of particles from a region of higher concentration to a region of lower concentration across a partially permeable membrane. Osmosis is the movement of water molecules specifically, while active transport requires energy to move substances against the concentration gradient.
扩散是粒子通过半透膜从高浓度区域向低浓度区域的净移动。渗透特指水分子的运动，而主动运输则需要能量来逆浓度梯度转运物质。
2. Organisation: Digestive & Circulatory Systems | 组织层次：消化与循环系统
The digestive system breaks down large, insoluble food molecules into small, soluble molecules that can be absorbed into the blood. Major organs include the mouth, oesophagus, stomach, small intestine, large intestine and liver (which produces bile).
消化系统将大分子、不溶性的食物分解为可被血液吸收的小分子可溶性物质。主要器官包括口腔、食道、胃、小肠、大肠以及产生胆汁的肝脏。
Digestive enzymes are biological catalysts. Amylase breaks down starch into maltose and other sugars; proteases break down proteins into amino acids; lipases break down lipids (fats) into glycerol and fatty acids. Bile neutralises stomach acid and emulsifies fats to increase surface area for lipase action.
消化酶是生物催化剂。淀粉酶将淀粉分解为麦芽糖等糖类；蛋白酶将蛋白质分解为氨基酸；脂肪酶将脂类（脂肪）分解为甘油和脂肪酸。胆汁能中和胃酸并乳化脂肪，以增大脂肪与脂肪酶作用的表面积。
The circulatory system consists of the heart, blood vessels and blood. The human heart has four chambers: two atria and two ventricles. The right side pumps deoxygenated blood to the lungs; the left side pumps oxygenated blood to the rest of the body. This is called a double circulatory system.
循环系统由心脏、血管和血液组成。人类心脏有四个腔室：两个心房和两个心室。右心房将缺氧血泵入肺部；左心室将富氧血泵送到全身。这被称为双循环系统。
Blood contains red blood cells (which carry oxygen using haemoglobin), white blood cells (defence against pathogens), platelets (involved in clotting) and plasma (transporting nutrients, hormones and waste products).
血液包含红细胞（利用血红蛋白运输氧气）、白细胞（防御病原体）、血小板（参与凝血）和血浆（运输营养物质、激素和废物）。
3. Bioenergetics: Photosynthesis & Respiration | 生物能量学：光合作用与呼吸作用
ion is: carbon dioxide + water → glucose + oxygen (in the presence of light and chlorophyll). The balanced chemical equation is: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂.
光合作用是植物及其他某些生物将光能转化为储存在葡萄糖中的化学能的过程。文字方程式为：二氧化碳 + 水 → 葡萄糖 + 氧气（在光和叶绿素的存在下）。配平的化学方程式为：6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂。
The rate of photosynthesis is affected by light intensity, carbon dioxide concentration and temperature. A limiting factor is a variable that restricts the rate when its supply is low.
光合作用速率受光照强度、二氧化碳浓度和温度的影响。限制因子是指供应不足时制约反应速率的变量。
takes place continuously in the mitochondria of cells. The symbol equation is: C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O.
有氧呼吸利用氧气从葡萄糖中释放能量。总反应为：葡萄糖 + 氧气 → 二氧化碳 + 水（+ 能量）。此过程在细胞的线粒体中持续进行。符号方程式为：C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O。
Anaerobic respiration in animal cells produces lactic acid, which can build up during intense exercise and cause muscle fatigue. In yeast and plant cells, anaerobic respiration produces ethanol and carbon dioxide – a process known as fermentation.
动物细胞中的无氧呼吸产生乳酸，乳酸在剧烈运动中累积会导致肌肉疲劳。在酵母和植物细胞中，无氧呼吸产生乙醇和二氧化碳——这一过程称为发酵。
4. Atomic Structure & The Periodic Table | 原子结构与元素周期表
Atoms consist of a central nucleus containing protons (positive charge) and neutrons (no charge), surrounded by electrons (negative charge) arranged in shells. The atomic number is the number of protons, which determines the element. The mass number is the total number of protons and neutrons.
原子由包含质子（带正电荷）和中子（不带电）的中央原子核以及排布在电子层中的电子（带负电荷）组成。原子序数是质子的数目，决定了元素种类。质量数是质子与中子的总数。
Electrons occupy shells (energy levels) with a maximum of 2 electrons in the first shell, 8 in the second, and 8 in the third for the first 20 elements. The electronic configuration of sodium (atomic number 11) is 2,8,1.
电子占据电子层（能级），对于前20号元素，第一层最多容纳2个电子，第二层最多8个，第三层最多8个。钠（原子序数11）的电子排布是2,8,1。
Isotopes are atoms of the same element with the same number of protons but different numbers of neutrons. They have identical chemical properties but different physical masses.
同位素是同种元素的原子，质子数相同而中子数不同。它们的化学性质相同，但物理质量不同。
The periodic table arranges elements in order of increasing atomic number. Elements in the same group (vertical column) have the same number of outer‑shell electrons and therefore similar chemical properties. Metals are on the left and in the centre, non‑metals on the right.
元素周期表按原子序数递增的顺序排列元素。同一族（竖列）的元素具有相同的最外层电子数，因而化学性质相似。金属位于左侧和中部，非金属位于右侧。
5. Bonding, Structure & Properties | 化学键、结构与性质
Ionic bonding occurs between metals and non‑metals. Metal atoms lose electrons to form positive ions (cations), while non‑metal atoms gain those electrons to form negative ions (anions). The resulting electrostatic attraction holds the ions together in a giant ionic lattice. Ionic compounds have high melting points and conduct electricity when molten or dissolved in water.
离子键形成于金属与非金属之间。金属原子失去电子形成阳离子，非金属原子得到电子形成阴离子。产生的静电引力将离子固定在巨型离子晶格中。离子化合物具有高熔点，且在熔融态或溶于水时能够导电。
Covalent bonding happens when non‑metal atoms share pairs of electrons to achieve a full outer shell. Simple molecular substances like water (H₂O) and methane (CH₄) consist of small molecules with weak intermolecular forces, giving them low melting and boiling points. Giant covalent structures, such as diamond and silicon dioxide (SiO₂), are made of billions of atoms linked by strong covalent bonds, making them very hard and having high melting points.
共价键发生在非金属原子之间，它们通过共用电子对而达到满壳层。如水（H₂O）和甲烷（CH₄）等简单分子物质由小分子组成，分子间作用力较弱，因而熔点和沸点较低。巨型共价结构（如金刚石和二氧化硅 SiO₂）由数十亿个通过强共价键连接的原子构成，非常坚硬且熔点极高。
Graphite is a form of carbon in which each atom bonds to three others, forming layers that can slide over one another. The delocalised electrons between layers allow graphite to conduct electricity, making it useful as an electrode.
石墨是碳的一种形式，每个碳原子与另外三个碳原子成键，形成容易滑动的层状结构。层间的离域电子使石墨能够导电，因而可用作电极。
Metallic bonding involves a lattice of positive metal ions surrounded by a 'sea' of delocalised electrons. This structure allows metals to conduct heat and electricity and to be bent or shaped without breaking (malleable). Alloys are mixtures of metals with other elements, often producing materials with enhanced strength or corrosion resistance.
金属键涉及被离域电子“海洋”包围的金属阳离子晶格。这种结构使金属能够导热、导电，并且可弯曲或塑形而不断裂（延展性）。合金是金属与其他元素的混合物，通常能产生强度或耐腐蚀性能增强的材料。
6. Chemical Reactions & Energy Changes | 化学反应与能量变化
to describe reactions. For example, the combustion of methane is: CH₄ + 2O₂ → CO₂ + 2H₂O.
在化学反应中，原子重新组合生成新物质，且质量守恒。文字方程式和配平的符号方程式被用来描述反应。例如，甲烷的燃烧反应为：CH₄ + 2O₂ → CO₂ + 2H₂O。
Reactions that release energy to the surroundings are exothermic (e.g., combustion, neutralisation). Reactions that absorb energy from the surroundings are endothermic (e.g., thermal decomposition). Reaction profiles show the energy change; in an exothermic profile the products have less energy than the reactants, while in an endothermic profile the products have more energy.
向周围环境释放能量的反应是放热反应（如燃烧、中和反应）。从周围吸收能量的反应是吸热反应（如热分解）。反应曲线图展示了能量变化；放热反应曲线中产物的能量低于反应物，吸热反应曲线中产物的能量高于反应物。
The overall energy change of a reaction can be calculated using bond energies: energy required to break bonds in reactants – energy released when forming bonds in products. A negative value indicates an exothermic reaction; a positive value indicates endothermic.
反应的总能量变化可利用键能计算：断裂反应物中化学键所需的能量 – 形成生成物中化学键所释放的能量。负值表示放热反应，正值表示吸热反应。
The rate of a reaction depends on factors such as the concentration of reactants, temperature, surface area, and the presence of a catalyst. Increasing temperature or concentration increases the frequency and energy of successful collisions. Catalysts lower the activation energy without being used up.
反应速率取决于反应物浓度、温度、表面积以及催化剂的存在。升高温度或增加浓度会提高成功碰撞的频率和能量。催化剂能降低活化能，且自身不被消耗。
7. Acids, Bases & Electrolysis | 酸、碱与电解
Acids are substances that release hydrogen ions (H⁺) in aqueous solution. Common acids include hydrochloric acid (HCl), sulfuric acid (H₂SO₄) and nitric acid (HNO₃). Bases neutralise acids to form salts; alkalis are soluble bases that release hydroxide ions (OH⁻).
酸是在水溶液中释放氢离子（H⁺）的物质。常见的酸有盐酸（HCl）、硫酸（H₂SO₄）和硝酸（HNO₃）。碱能中和酸形成盐；碱是可溶性碱，释放氢氧根离子（OH⁻）。
pH. A neutralisation reaction produces a salt and water, e.g.: hydrochloric acid + sodium hydroxide → sodium chloride + water.
pH 值的范围从0（强酸性）到14（强碱性），7为中性。可用通用指示剂或 pH 计测量 pH 值。中和反应产生盐和水，例如：盐酸 + 氢氧化钠 → 氯化钠 + 水。
Electrolysis uses an electric current to break down an ionic substance that is molten or in solution. Positive ions (cations) move to the negative electrode (cathode) and gain electrons; negative ions (anions) move to the positive electrode (anode) and lose electrons. In the electrolysis of molten sodium chloride, sodium forms at the cathode and chlorine gas at the anode.
电解是利用电流分解熔融态或溶液中的离子化合物。阳离子移向负极（阴极）获得电子；阴离子移向正极（阳极）失去电子。电解熔融氯化钠时，在阴极生成钠，在阳极生成氯气。
The reactivity series of metals can be summarised by: potassium > sodium > lithium > calcium > magnesium > aluminium > zinc > iron > lead > copper > silver > gold. More reactive metals are harder to extract from their ores; those below carbon can often be extracted by reduction with carbon.
金属活动性顺序可概括为：钾 > 钠 > 锂 > 钙 > 镁 > 铝 > 锌 > 铁 > 铅 > 铜 > 银 > 金。越活泼的金属越难从其矿石中提炼出来；在碳以下的金属通常可用碳还原法提炼。
8. Forces & Motion | 力与运动
, displacement, force). The speed of an object is calculated as distance ÷ time. Acceleration is the rate of change of velocity: a = (v – u) / t.
标量只有大小（如速率、路程、质量），矢量既有大小又有方向（如速度、位移、力）。物体的速率等于距离 ÷ 时间。加速度是速度的变化率：a = (v – u) / t。
On a distance–time graph, the gradient represents speed; a horizontal line indicates the object is stationary. On a velocity–time graph, the gradient represents acceleration, and the area under the graph represents displacement.
在距离–时间图中，斜率代表速率；水平线表示物体静止。在速度–时间图中，斜率代表加速度，图线下的面积代表位移。
Newton' mains at rest or moves with constant velocity unless acted on by a resultant force. Newton' Second Law can be expressed as: F = m × a (resultant force = mass × acceleration). Newton's Third Law states that for every action there is an equal and opposite reaction.
牛顿第一定律指出，物体保持静止或匀速直线运动状态，除非受到合外力的作用。牛顿第二定律可表示为：F = m × a（合外力 = 质量 × 加速度）。牛顿第三定律指出，每一个作用力都有一个大小相等、方向相反的反作用力。
Stopping distance is the sum of thinking distance and braking distance. Factors affecting stopping distance include speed, driver reaction time, and the condition of the vehicle and road surface.
制动距离是反应距离与刹车距离之和。影响制动距离的因素包括车速、驾驶员反应时间以及车辆和路面状况。
9. Waves & Electromagnetic Spectrum | 波与电磁波谱
Waves transfer energy without transferring matter. In a transverse wave (e.g., light, water ripples), the oscillations are perpendicular to the direction of energy transfer. In a longitudinal wave (e.g., sound), the oscillations are parallel to the direction of energy transfer, producing compressions and rarefactions.
波可以传递能量而不传递物质。在横波（如光、水波）中，振动方向与能量传递方向垂直。在纵波（如声波）中，振动方向与能量传递方向平行，形成疏部和密部。
lacement from the rest position, and frequency is the number of complete waves passing a point per second, measured in hertz (Hz).
波速公式将波速（v）、频率（f）和波长（λ）联系在一起：v = f × λ。振幅是离开平衡位置的最大位移，频率是每秒通过某点的完整波的数量，单位为赫兹（Hz）。
wavelength, consists of: radio waves, microwaves, infrared, visible light, ultraviolet, X‑ rays. All electromagnetic waves travel at the speed of light in a vacuum (3.0 × 10⁸ m/s).
电磁波谱按频率递增、波长递减的顺序为：无线电波、微波、红外线、可见光、紫外线、X 射线和伽马射线。所有电磁波在真空中的传播速度均为光速（3.0 × 10⁸ m/s）。
Different parts of the spectrum have different uses and dangers. Radio waves are used for communication; microwaves for satellite and mobile phone signals; infrared for heating and remote controls; visible light for sight; ultraviolet for tanning and sterilisation but can cause skin cancer; X‑rays for medical imaging; gamma rays for cancer treatment but are highly ionising and damaging to cells.
波谱的不同部分有不同的用途和危害。无线电波用于通信；微波用于卫星和移动电话信号；红外线用于加热和遥控；可见光用于视觉；紫外线用于晒黑和消毒，但可能导致皮肤
Published by TutorHao | Year 10 Science Revision Series | aleveler.com
更多咨询请联系16621398022（同微信）
或截图后用「扫一扫 → 相册」选择本图