Science Class 7
The World of Metals and Non-metals
Tests that spot a metal, and how metals and non-metals meet air and water.
14 lessons · ~73 min total
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Lessons in this topic
- 0 Start here Tests spot a metal. One pencil core breaks the pattern. · 3 min You are here
- 1 Shine, and the sound it makes A clean metal throws back light and rings when struck. Shine alone proves nothing. · 5 min
- 2 Beaten flat, or pulled into a wire A metal spreads flat under a blow and pulls into wire. Coal just shatters. · 5 min
- 3 Carrying warmth, and carrying the loop Metals carry warmth and the loop well. One grey pencil core does too. · 6 min
- 4 Non-metals are all around you Nitrogen and sulfur are non-metals. Mercury is a metal, and it is liquid. · 6 min
- 5 Why iron goes orange Rust needs air and water together. Take either one away and iron stays bright. · 6 min
- 6 The job decides which test matters No property wins every job. The right material has the two properties the job needs. · 6 min
- 7 Checkpoint: properties, rusting and choosing A quick check on metal tests, states, rusting and choosing. · 4 min
- 8 What burning makes: oxides A metal oxide is usually basic. A non-metal oxide is usually acidic. · 6 min
- 9 Why sodium sits in kerosene Some substances react fast. They are kept from air or water. · 6 min
- 10 Why gold and silver make jewellery Jewellery metals shine, shape easily and keep their shine well. · 5 min
- 11 Jobs that non-metals do Non-metals do vital jobs: breathing, plant growth, clean water and antiseptics. · 5 min
- 12 The big picture One screen for the chapter. The pencil core breaks the pattern. · 3 min
- 13 Track quiz Fourteen quick questions on metals and non-metals. The ten rules are at the top. · 7 min
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