Science and Technology, Secondary 3

Unit 1: The Material World

Properties of solutions, the particle model, chemical reactions, forms of energy, pure substances, fluids and pressure, and waves and optics.

• Solubility and its limits
• Concentration of a solution
• Density

• The particle model and its limits
• Dissolution and dilution
• Phase changes with the particle model

• Decomposition, synthesis and oxidation
• Precipitation reactions

• Forms of energy and transformations

• Pure substances, elements and compounds

• Pressure in fluids

• Waves, sound and the spectrum
• Reflection, refraction and lenses

Unit 2: The Living World

Organization of life and the human body: digestion, respiration, circulation, excretion, the nervous system and senses, the musculoskeletal system, and cell division.

• Cells, tissues, organs and systems

• The digestive tract and glands
• Food constituents and their transformation

• The respiratory system
• Blood: plasma and formed elements

• The circulatory and lymphatic systems
• The urinary and excretory system

• Central and peripheral nervous systems
• The sense organs

• The skeleton, muscles and joints

• DNA, mitosis and meiosis
• Puberty and reproductive physiology

Unit 3: The Earth and Space

Geological time and fossils, and distances and conditions for life in space.

• Rock strata and geological time
• Fossils and dating

• Astronomical distances and conditions for life

Unit 4: The Technological World

Technical drawing and projection, links and mechanical systems, materials, and biotechnology processes.

• Choosing diagrams and reading lines
• Projection and scale

• Links and typical functions
• Motion transmission and transformation

• Material constraints and properties
• Biotechnology processes