Minerals and Earth resources
Compare the observable properties of minerals (colour, lustre, scratch hardness) and investigate why soils, rocks and minerals are important Earth resources (building materials, growing food, metals, salt)
Lesson
Set out your lesson
“A mineral has characteristic properties, but colour alone often does not identify it. Lustre means how a surface reflects light. Scratch hardness compares resistance to a scratch, not toughness. Today we interpret supplied specimen observations. We do not scratch unknown stones or taste minerals. Safety: Use only supplied cards. Real mineral dust, sharp edges, tasting, and scratch tools are excluded. Stop: Stop after the paper comparison. Do not taste, grind, hammer, or scratch minerals or household surfaces.”
Bring to the table
- Paper
- Pencil
- Ruler for table lines if wanted
Extra for the adult
Worked example. Compare quartz and halite. Answer: both examples have glassy lustre, but only halite is scratched in this supplied fingernail record. That supports quartz being harder than the fingernail; it does not identify an unknown clear mineral by itself.
Optional challenge. Name an extra observation that could separate two similar-looking samples; explain why one test is insufficient.
What to notice. Keep the comparison and product links. Note whether an adult read terms, supplied links, or wrote the explanation.
Share and support
Family records and proof options
Keep a record of your learning
Save photos, notes, and attendance. Export a proof packet for compliance or portfolio reviews.
Learning resources
Extra practice links — they do not replace Gakuva’s teaching approach.
National Park Service · Practice link — not the full lesson
Rocks and Minerals
Before you open · source notes
Rocks and Minerals supports Minerals and Earth resources. An adult previews and guides; this is a learning page, not a scored quiz.
Free educational page, no sign-in required for the tested path.
Before you openAsk the learner one fact they learned and one question they still have.
Opening this link does not save learning or assess mastery.
Source, access and review notes
Public National Park Service page. An anonymous GET on 2026-11-12 returned HTTP 200 with no login or payment prompt for this URL. Opening the link does not save practice or assess mastery. An adult should preview and guide the learner.
National Park Service. “Rocks and Minerals.” External page; Gakuva does not copy, host, embed, or redistribute materials.
Unknown — link only
Check understanding
- Compare minerals such as quartz, mica and halite by colour, lustre and a scratch test for hardness, recording results in a table
- Match Earth resources to uses (e.g. clay to bricks, sand to glass, iron ore to steel, soil to growing food, salt to cooking)
- Explain why one Earth resource is important to people in Australia (e.g. iron ore mining or soil for farming)
“If your child looks at a rock or crystal collection, can they compare things like shininess and hardness — and explain how rocks, soils and minerals are used, like clay for bricks?”
Curriculum record
- Type
- Conceptual
- Subject
- Science
- Domain
- Earth's Systems
- Age range
- Ages 8–10
Standards