End of years

Chapter 1: Characteristics of Living Organisms

  • Students can describe all 8 of the characteristics that living organisms share:

    • Movement

    • Respiration

    • Sensitivity

    • Growth

    • Reproduction

    • Excretion

    • Nutrients

    • Homeostasis

  • Students can describe the structure of a plant cell and explain the function of all the main parts:

    • Cell wall, chloroplasts, vacuoles, and cellulose

  • Students can describe the structure of an animal cell and explain the function of all the main parts:

    • Cell membrane, nucleus, cytoplasm, mitochondria

  • Students can compare the similarities and differences of plant and animal cells.

  • Students can describe the levels of organisation in organisms.

  • Students can define the term organ system.

  • Students can explain cell differentiation (Biology only).

  • Students can explain the development of specialised cells (Biology only).

  • Students can describe the advantages and disadvantages of using stem cells in medicine (Biology only).

Chapter 2: Variety of Living Organisms

  • Students can name each of the five cell types: animal, plant, fungi, bacteria, protoctist.

  • Students can describe the structure of a bacterial cell and explain the function of all the main parts: cell wall, plasma membrane, and genetic material.

  • Students can describe the structure of a yeast cell and explain the function of all the main parts: cell wall, cell membrane, cytoplasm, and nucleus.

  • Students can describe the structure of a multicellular fungi like Mucor and explain the function of all the main parts.

  • Students can identify protoctists by both description and drawing.

  • Students can distinguish between all five cell types.

  • Students can give at least two examples of each of the five cell types.

  • Students can describe the structure of a virus and explain why a virus is not classified as a cell.

  • Students can give at least three examples of viruses.

  • Students can describe the different ways diseases are caused: viruses, bacteria, protoctist, or fungi.

  • Students can define the term pathogen.

Chapter 3: Breathing and Gas Exchange

  • Students can describe the structure and function of the lungs.

  • Students can describe the roles of the intercostal muscles and the diaphragm in breathing.

  • Students can explain how alveoli are adapted for gas exchange.

  • Students can describe the effects of smoking on the lungs and the circulatory system.

  • Students can describe how smoking causes coronary heart disease.

  • Students can describe an investigation into breathing in humans, including the release of carbon dioxide and the effect of exercise.

Chapter 4: Food and Digestion

  • Students can state and describe the components of a balanced diet.

  • Students can identify the elements present in carbohydrates, proteins and lipids.

  • Students can describe the structure of carbohydrates, proteins and lipids.

  • Students can describe the food tests for starch, glucose, protein, and fat.

  • Students can describe the role of enzymes in the body.

  • Students can describe how the digestive system works and define peristalsis.

  • Students can describe the roles of amylase, maltase, proteases, and lipases.

  • Students can describe how the small intestine is adapted for absorption.

  • Students can describe the structure of the villus.

Chapter 5: Blood and Circulation

  • Students can explain why multicellular organisms need transport systems.

  • Students can state the components of the circulatory system of the body.

  • Students can describe the structure and function of the heart and blood vessels.

  • Students can explain how the heart rate changes during exercise and how adrenaline affects the body.

  • Students can describe the impact cardiovascular disease can have on a person's life and different treatments for

Of course! Here are student-friendly notes based on your Year 10 IGCSE Edexcel Triple Science Biology topics you gave (Chapter 1–5):

Chapter 1: Characteristics of Living Organisms

The 8 Characteristics of Living Organisms

  • Movement: All living things move (plants move slowly, animals move fast).

  • Respiration: Chemical reactions that break down nutrients to release energy.

  • Sensitivity: Detecting and responding to changes (stimuli) in the environment.

  • Growth: Permanent increase in size and mass.

  • Reproduction: Making more organisms (offspring).

  • Excretion: Removing waste products made by chemical reactions inside cells.

  • Nutrition: Taking in and using food/materials for growth and energy.

  • Homeostasis: Keeping internal conditions stable (e.g., body temperature).

Structure and Function of a Plant Cell

  • Cell wall: Made of cellulose; provides support and protection.

  • Chloroplasts: Contain chlorophyll for photosynthesis.

  • Vacuole: Stores cell sap (water, sugars, salts) and helps keep the cell firm.

  • Cellulose: A strong carbohydrate that makes up the plant cell wall.

Structure and Function of an Animal Cell

  • Cell membrane: Controls what enters and leaves the cell.

  • Nucleus: Contains DNA and controls the cell’s activities.

  • Cytoplasm: Jelly-like fluid where chemical reactions happen.

  • Mitochondria: Release energy by aerobic respiration.

Comparing Plant and Animal Cells

Feature

Plant Cells

Animal Cells

Cell wall

Yes (cellulose)

No

Chloroplasts

Yes (for photosynthesis)

No

Vacuole

Large central vacuole

Small or none

Shape

Regular, boxy shape

Irregular shape

Levels of Organisation

  • Cells → Tissues → Organs → Organ Systems → Organism

Organ System

  • A group of organs working together to perform a function.

Cell Differentiation

  • When unspecialised cells (stem cells) become specialised for a specific function.

Specialised Cells

  • Cells develop different structures (e.g., red blood cells, nerve cells) to perform particular jobs.

Stem Cells in Medicine

  • Advantages: Can replace damaged cells (e.g., in diabetes, spinal injuries).

  • Disadvantages: Risk of rejection, ethical issues, uncontrolled cell growth (cancer).

Chapter 2: Variety of Living Organisms

Five Cell Types

  • Animal cells, Plant cells, Fungi, Bacteria, Protoctists.

Structure of a Bacterial Cell

  • Cell wall: Gives shape and protection (not made of cellulose).

  • Plasma membrane: Controls what enters/leaves.

  • Genetic material: Single circular DNA strand, no nucleus.

Structure of a Yeast Cell

  • Cell wall: Protection and structure.

  • Cell membrane: Controls substances.

  • Cytoplasm: Site of chemical reactions.

  • Nucleus: Contains DNA.

Structure of a Multicellular Fungus (e.g., Mucor)

  • Made of a network of thread-like structures (hyphae).

  • Cell walls made of chitin.

Identifying Protoctists

  • Microscopic, usually single-celled, have a nucleus.

  • Example: Amoeba, Plasmodium.

Examples of Each Group

  • Animal: Humans, dogs

  • Plant: Oak tree, algae

  • Fungi: Yeast, Mucor

  • Bacteria: Lactobacillus, Pneumococcus

  • Protoctists: Amoeba, Plasmodium

Viruses

  • Structure: Genetic material (DNA or RNA) inside a protein coat (capsid).

  • Not cells; need a host cell to reproduce.

  • Examples: Influenza, HIV, Tobacco Mosaic Virus.

Causes of Disease

  • Virus (e.g., HIV)

  • Bacteria (e.g., Pneumonia)

  • Protoctist (e.g., Malaria)

  • Fungi (e.g., Athlete’s foot)

Pathogen

  • A microorganism that causes disease.

Chapter 3: Breathing and Gas Exchange

Structure and Function of the Lungs

  • Lungs are in the thorax, protected by the ribcage.

  • Main parts: trachea, bronchi, bronchioles, alveoli (where gas exchange happens).

Breathing Muscles

  • Intercostal muscles: Move the ribs during breathing.

  • Diaphragm: Dome-shaped muscle under lungs; moves to change chest volume.

Adaptations of Alveoli

  • Large surface area, thin walls, moist surface, rich blood supply for efficient gas exchange.

Effects of Smoking

  • Damages alveoli (emphysema), reduces gas exchange.

  • Causes lung cancer.

  • Narrows blood vessels, leading to heart disease.

Coronary Heart Disease

  • Smoking increases blood pressure and clots, damaging arteries and causing heart attacks.

Breathing Investigation

  • Measure breathing rate before and after exercise.

  • Test exhaled air for carbon dioxide (limewater turns cloudy).

Chapter 4: Food and Digestion

Components of a Balanced Diet

  • Carbohydrates, proteins, lipids (fats), vitamins, minerals, fibre, water.

Elements in Biomolecules

  • Carbohydrates: Carbon, hydrogen, oxygen.

  • Proteins: Carbon, hydrogen, oxygen, nitrogen (sometimes sulfur).

  • Lipids: Carbon, hydrogen, oxygen.

Structure

  • Carbohydrates: Sugars (glucose) and starch (long chains of glucose).

  • Proteins: Chains of amino acids.

  • Lipids: Glycerol + fatty acids.

Food Tests

  • Starch: Iodine solution (turns blue-black).

  • Glucose: Benedict’s solution + heat (turns brick red).

  • Protein: Biuret solution (turns purple).

  • Fat: Ethanol + water (white emulsion forms).

Role of Enzymes

  • Speed up chemical reactions in the body (biological catalysts).

Digestive System

  • Breaks down food into small molecules that can be absorbed.

  • Peristalsis: Muscle contractions moving food along the gut.

Enzymes in Digestion

  • Amylase: Starch → maltose

  • Maltase: Maltose → glucose

  • Proteases: Proteins → amino acids

  • Lipases: Lipids → fatty acids + glycerol

Small Intestine Adaptations

  • Long, folded, villi and microvilli increase surface area for absorption.

Structure of a Villus

  • Thin wall, good blood supply, lacteal for fat absorption.

Chapter 5: Blood and Circulation

Need for Transport Systems

  • Multicellular organisms are too large for diffusion alone to meet their needs.

Components of the Circulatory System

  • Heart: Pumps blood.

  • Blood vessels: Arteries, veins, capillaries.

  • Blood: Carries oxygen, nutrients, waste.

Structure and Function

  • Heart: 4 chambers, pumps blood to lungs (right side) and body (left side).

  • Arteries: Thick walls, carry blood away from the heart.

  • Veins: Thin walls, valves, carry blood to the heart.

  • Capillaries: Tiny, thin walls, exchange materials with tissues.

Heart Rate Changes

  • Increases during exercise to supply muscles with oxygen.

  • Adrenaline: Hormone that increases heart rate for ‘fight or flight’ response.

Cardiovascular Disease

  • Caused by blocked arteries (atherosclerosis).

  • Leads to heart attacks or strokes.

  • Treatments: Lifestyle changes, medication, surgery (e.g., stents, bypass).