SME
Grade 7 Science
Physical Science
Atoms, elements and molecules
States of matter and phase changes
Main lesson
Heating curve of water
Use this for “What is the temperature 30 minutes into heating the ice, and what state is it in?”
Name the change
Use this for “Which is an example of water condensing?”
Heat in or heat out?
Use this for “Which change needs thermal energy to be added?”
Solid, liquid or gas at room temperature?
Use this for “At 20 °C, is the substance a solid, a liquid or a gas?”
Water left in an open cup
Use this to record how much water is left in an open cup each day.
Chemical reactions and balancing basics
Main lesson
Iron rusting: iron and oxygen make iron oxide
Use this for “How many oxygen molecules react with 4 iron atoms to make rust?”
Burning methane
Use this for “Balance CH₄ + O₂ → CO₂ + H₂O” and “How many oxygen molecules does one methane molecule burn with?”
Mass before and after a reaction
Use this for “20 g of A and 10 g of B react completely. How much C forms?” and “The sealed bottle weighed 230 g; opened, 228.5 g. How much gas escaped?”
Chemical change or physical change?
Use this for “Is water changing into steam a chemical change?”
Changes that heat up or cool down
Use this for “Which reaction could warm a meal without a flame?”