Year 9 Science Semester 2 Exam Topics PDF

**Semester 2 Year 9 Science** **Exam topics** Chemistry - **Atomic models**- Solid sphere, plum pudding, nuclear model, planetary model, quantum model - **Who invented the atomic models** - **What the atomic models were and what they got right and wrong.** - **Why is the quantum mo...

**Semester 2 Year 9 Science** **Exam topics** Chemistry - **Atomic models**- Solid sphere, plum pudding, nuclear model, planetary model, quantum model - **Who invented the atomic models** - **What the atomic models were and what they got right and wrong.** - **Why is the quantum model the accepted model? What [principle] is it based on?** - **What makes up an atom-** electrons, neutrons, protons - **The structure of an atom-** where you find the electrons, neutrons, and protons. - **The charge of each of the subatomic particles-** electrons = negative, Protons= positive, Neutrons = neutral (no charge). - **How to calculate radioactive decay** - **Isotopes-** what they are and why some become radioactive - **Ions-** what they are, how you make/get an ion and their charge. Cation=positive, Anion= negative. - **How to calculate how many protons, neutrons and electrons are in an isotope when given the atomic number and the isotope number.** - **The relative mass of a proton, neutron, and electron.** - **How to read and plot graphs** - **What is pH-** acid 0-6, neutral 7, base 8-14. - **Reactants and products** - **Acid and a metal reaction =?** - **Acid and base reaction=?** - **Acid and carbonate reaction=?** - **Combustion reaction=?** - **Incomplete combustion reaction =?** - **Endothermic and exothermic reactions.** - **How humans are exothermic in the way we make our energy.** - **How plants are endothermic in the way they make their energy.** - **Law of conservation of mass** Earth science - **What are the layers of the Earth?** - **What is plate tectonics?** - **What is continental drift?** - **What is the proof for continental drift?** - **What are the other theories that led to plate tectonics?** - **What was the name of the most recent supercontinent?** - **What are the plate boundary types? --** convergent, divergent, transform - **What happens at the different plate boundaries?** Subduction, Earthquakes, Tsunamis, volcanoes, mountain building. - **The different seismic waves produced by earthquakes.** - P, S, L R - **The difference between a body wave and a surface wave.** - **What are hot spot volcanoes?** - **What is a craton and a shield?** - **what is seafloor spreading and what it tells us about the Earth's magnetic field?** - **What makes Australia more geologically stable than other countries?**