Year 9 Science Semester 1, 2025 Examination Revision Notes
Year 9 Science Semester 1, 2025 Examination Revision Guide
Introduction
This document assists with examination preparation.
It provides a framework for preparation.
Start preparation early and seek help when needed.
Topics
Materials (Chapter 2)
Reaction Types (Chapter 3 - sections 3.1, 3.2, 3.4)
Light (Chapter 4 - sections 4.3, 4.4 - The eye)
Electromagnetic radiation (Chapter 5 - sections 5.1, 5.2)
Exam Details
Supplied Materials: One exam paper (multiple choice, short answer, extended response).
Requirements: Pencils, eraser, sharpener, highlighter, pens, ruler, scientific calculator, protractor. No liquid paper.
Preparation Suggestions
Summarize key terms by making a glossary.
Use the glossary of terms at the end of each chapter to Read, Cover, Remember, Retell.
Review topic tests and redo questions, especially incorrect ones.
Use mind maps to organize thoughts and summarize concepts.
Answer all Lightbook questions.
Do all practice runs from Lightbook.
Complete Quizlet sets.
Examination Technique Suggestions
Prepare well: Good revision and understanding are crucial.
Read questions carefully: Underline key words.
Multiple Choice Questions:
Eliminate incorrect responses.
Read the question carefully; responses hide the correct answer.
Don’t guess without narrowing possibilities.
Manage time:
Use reading time to identify easy questions and answer them first.
Doing easier questions first allows you more time to work on the difficult questions.
Don’t get stuck; move on and return later.
Check answers carefully for silly mistakes if you finish early.
Don’t panic! Breathe deeply and refocus if stressed.
Don’t leave questions unanswered; attempt every question.
Chapter 2: Materials
Atoms
Atom model: Neutrons, protons, electrons, symbol, atomic number, mass number.
Structure: Element, compound, atom, ion, crystal lattice.
Ions: Gaining/losing electrons.
Periodic Table: Metals, metalloids, and non-metals locations; interpret periodic table elements.
Metals, Non-metals, and Metalloids
Location on Periodic Table, properties, characteristics, examples.
Alloys: General examples, steel alloys, steel treatment processes.
Acids and Bases
Acids and Bases: pH levels, and , indicators (litmus paper, universal pH indicator colours).
Balancing Chemical Equations
Complete Chapter Review p72.
Chapter 3: Reaction Types
Combustion and Corrosion Reactions
Equations.
Exothermic, endothermic reactions.
Complete and incomplete combustion differences.
Acid Reactions
Neutralisation, carbonate and metal reactions.
Nuclear Reactions
Alpha, beta, gamma decay: Properties and balancing equations.
Half-life; carbon dating and properties, ionising radiation, penetrating ability.
Isotopes and radioisotopes.
Interpreting nuclear reactions and equations for alpha/beta/gamma decay.
Complete Chapter Review p119
Chapter 4: Heat, Sound, and Light (Focus on Light)
Light
Light properties: Luminous/non-luminous, transparent/translucent, electromagnetic wave properties.
Reflection: Diffuse/regular reflection, law of reflection/diagrams, mirrors, real/virtual image, characteristics of plane mirrors/images.
Refraction: Away/towards normal, high/low refractive index, total internal reflection, refraction diagrams.
Lenses: Convex, concave, focal length, focal points, how light travels through, diagrams.
Eye: All parts, functions, labels, diagrams.
Complete Chapter Review p173
Chapter 5: Electromagnetic Radiation
Electromagnetic spectrum p183
The visible spectrum
Colours: Primary and secondary colours and how they work, white light, prisms (OneNote work)
How different coloured objects reflect/absorb light.
Complete Chapter Review p215
Exam Focus - Be able to:
Design an experiment and state the dependent, independent, and controlled variables.
State a hypothesis for an experiment which incorporates the dependent and independent variables.
Plot a graph with provided data.
Draw and label the sub-atomic parts of an atom.
Calculate the atomic number of an atom when given the number of protons, neutrons, and electrons and in other combinations.
Recognize ions and determine how many electrons have been lost or gained.
Define isotopes.
List the properties of metals and nonmetals.
Define alloys.
List and describe types of radiation.
Make calculations using the half-life of an element.
Explain the use of carbon dating of fossils.
List the properties of an acid and a base.
Read a pH scale and give examples of the pH of common substances.
How to use blue and red litmus paper.
Name the particles in a solution that determine if it is an acid or base (alkali).
Describe the difference between an endothermic reaction and an exothermic reaction, give examples of each.
Determine the reactants and products in a word equation of chemical reactions.
What is the law of conservation of mass?
Balance equations.
Identify different types of combustion and corrosion reactions:
Combustion reactions; one of the reactants is…
Combustion of fossil fuels produce
Corrosion reactions have a m… as one of the reactants, and the products contain a salt and h… gas, or a metal o…
Name the product that indicates an incomplete reaction in a combustion reaction.
Fill in the following:
Acid + metal
Neutralisation reactions. Acid + base (Look for acids with H and bases with OH)
Acid + carbonate (Look for )
Fill in the following table:
Identify the particle in a nuclear decay equation (alpha, beta, or gamma).
State the structure and function of the parts of the eye.
Draw the resulting light rays and focal point of light that passes through convex and concave lenses.
Draw the resulting light rays after it has been reflected off a mirror and label the normal, angles of incidence, and reflection.
Draw the resulting light rays after passing into a medium that is denser.
Be able to recall the primary and secondary colours of light.
Be able to determine the colours of light passing through coloured filters.
Be able to state the position of waves on the electromagnetic spectrum and relate wavelength and frequency to its position.
Okay, I will answer with simple dot points to ensure it's easy for you to read.
Point 1: I'm ready to help with all topics in the revision guide (Materials, Reaction Types, Light, Electromagnetic Radiation).
Point 2: Please send the practice exam when you're ready; we can review it together.
Point 3: Let me know which topic you want to focus on first.
Point 4: I can create flashcards, explain concepts, and answer questions.
Point 5: Your success is my priority, and I'm here to support your learning process.
Point 6: Any question from the note provided earlier for context anytime.
Point 7: Don't hesitate to send it over :)
Point 8: Be happy, be healthy, and be safe, as always.
Okay, I will answer with simple dot points to ensure it's easy for you to read.
Point 1: I'm ready to help with all topics in the revision guide (Materials, Reaction Types, Light, Electromagnetic Radiation).
Point 2: Please send the practice exam when you're ready; we can review it together.
Point 3: Let me know which topic you want to focus on first.
Point 4: I can create flashcards, explain concepts, and answer questions.
Point 5: Your success is my priority, and I'm here to support your learning process.
Point 6: Any question from the note provided earlier for context anytime.
Point 7: Don't hesitate to send it over :)
Point 8: Be happy, be healthy, and be safe, as always.