HS-ESS1-5
The standard
Evaluate evidence of the past and current movements of continental and oceanic crust and the theory of plate tectonics to explain the ages of crustal rocks.
Next Generation Science Standards
What this standard means
Students need to use evidence to explain why crustal rocks have different ages in different places. They should connect young ocean crust near mid-ocean ridges to seafloor spreading, and older ocean crust farther away to continued movement. They should also explain why continental crust can be much older and show patterns shaped by past plate collisions and rifting.
Mastery looks like reading a rock-age map or data table, spotting age patterns, and tying those patterns to plate motion. Students often mix up oceanic and continental crust, think all crust is the same age, or describe plate movement without using evidence from rock ages.
Ways to teach it
- Hands-on activity: Have students color-code an ocean floor age map, then draw arrows showing seafloor spreading from the mid-ocean ridge.
- Discussion prompt: Ask, “Why is ocean crust usually younger than continental crust?” and require students to cite one map detail.
- Quick assessment: Give three crust-age data points from a ridge outward and ask students to identify the plate process shown.
- Real-world connection: Compare Atlantic Ocean crust ages to the distance between South America and Africa to explain how the ocean basin widened.
Plan a lesson for HS-ESS1-5
Generate a complete lesson plan aligned to this standard, with objectives, activities, and materials. Free, no account needed.
Related standards
- MS-ESS2-2
Construct an explanation based on evidence for how geoscience processes have changed Earth's surface at varying time and spatial scales.
- 4-ESS1-1
Identify evidence from patterns in rock formations and fossils in rock layers to support an explanation for changes in a landscape over time.
- HS-ESS1-6
Apply scientific reasoning and evidence from ancient Earth materials, meteorites, and other planetary surfaces to construct an account of Earth's formation and ...
- MS-ESS2-3
Analyze and interpret data on the distribution of fossils and rocks, continental shapes, and seafloor structures to provide evidence of the past plate motions.