Year 7 · Summer Second Half
Physics
2 lessons from 1 unit.
Unit P11 · lessons 3 to 4 of 4
Density is what the particle model is for: how tightly matter is packed, why a jiggling speck proves the particles are there, why hot is not the same as a lot, and why ice is the one solid that floats on its own melt.
- 03Temperature, particle motion and internal energyModelA spark from a grinder is at a thousand degrees and it bounces off your arm without a mark. A bath at forty, barely more than body temperature, already feels properly hot. Both facts are about energy, and neither is about temperature alone.Open this lesson
- 04Why ice floatsContrastSolids sink in their own melt. Iron does, wax does, aluminium does. Water does not — and if it did, ponds would freeze from the bottom and take everything in them with it.Open this lesson
Back to all three sciences this half term The whole KS3 Physics course