Science topic
Grade 7 matter and materials
Solids, liquids and gases, properties of materials, mixtures and reactions. Here is what we have for Grade 7.
Lessons
Free tools
Periodic Table Explorer
All 118 elements, coloured by family. Click one for its atomic number, mass, state, discovery and an everyday use, or highlight metals, gases and more.
States of Matter
Heat and cool a box of particles and watch them pack into a solid, slide as a liquid and fly apart as a gas, with a live thermometer.
pH Scale Explorer
Test household liquids on a pH scale with a cabbage-juice indicator colour, from lemon juice to bleach, and mix acids and bases to see neutralisation.
Matter and materials in other grades:KindergartenGrade 1Grade 2Grade 3Grade 4Grade 5Grade 6Grade 8Grade 9All grades