Rock Layers & Relative Dating
Understand that rock layers (strata) form in sequence with the oldest at the bottom and the youngest at the top, and that fossils found in deeper layers are older — this is the principle of relative dating
Share and support
Teaching Table
Set out your lesson
Practise the bounded task in Rock Layers & Relative Dating; see exact limits before inferring broader coverage.
Can order top and bottom; relative age is not an age in years.
Exact directed source edges retained; earlier authorship is not learner attainment.
These supplied stage cards
Scrap paper and pencil; oral/pointing response where appropriate
Read readiness and decide on support without treating prerequisite authoring as learner readiness.
Open Show first and explain its model.
Use Guided Try with support and its separate adult key.
Close Show and guided keys before Try, unless this Try is explicitly supported.
Reflect on an actual attempt, including help used.
Use the supplied screen cards; copying the exact task to paper is optional, not required.
Use only invented scenarios and optional anonymous local notes. Do not request names, photos, family finances, medical data, accounts or uploads. Stop uncomfortable physical activity.
Use only invented scenarios and optional anonymous local notes. Do not request names, photos, family finances, medical data, accounts or uploads. Stop uncomfortable physical activity.
Use the complete materials on screen or print only the current sheet. Keep adult guidance out of learner view. Retain an earlier model only when the current step supplies it as context.
Teaching limits and safe use
These are finite task opportunities, not proof of mastery. Record what was attempted and what support was used.
Ideal strata ordering; no field geology, actual dating or disturbed-section reconstruction.
Use only invented scenarios and optional anonymous local notes. Do not request names, photos, family finances, medical data, accounts or uploads. Stop uncomfortable physical activity.
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
Reviewed external links that reinforce this concept. They do not replace Gakuva’s teaching approach.
No reviewed resources for this concept yet.
The teaching approach above still stands. Curated practice links will appear here as the shelf fills.
Check understanding
- Explain that sedimentary rock forms in layers with the oldest at the bottom
- Use a diagram of rock strata to determine which fossil is older based on its position
- Define relative dating as working out the age of something by comparing its position in rock layers
“If your child saw a cliff with layers of rock, could they explain that the bottom layers are the oldest and that fossils found deeper down lived longer ago?”
Curriculum record
- Type
- Conceptual
- Subject
- Science
- Domain
- Dinosaurs & Paleontology
- Age range
- Ages 9–11