Embedded Files
Essential Question
What can rocks, ice, trees and fossils reveal about Earth's past?
Disciplinary Core Ideas:
Although active geologic processes, such as plate tectonics and erosion, have destroyed or altered most of the very early rock record on Earth, other objects in the solar system, such as lunar rocks, asteroids, meteorites have changed little over billions of years. Studying these objects can provide information about Earth's formation and early history.
The radioactive decay of unstable isotopes continually generates new energy within Earth’s crust and mantle, providing the primary source of the heat that drives mantle convection. Plate tectonics can be viewed as the surface expression of mantle convection.
Learning Expectations:
The student is expected to evaluate evidence of the past and current movements of continental and oceanic crust and the theory of plate tectonics to explain the ages of rocks.
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 early history.
Minds on Earth Science (MOES)
Minds on Earth Science (MOES)
MOES 49: Science Literacy Practice
MOES 50: Eons
MOES 51: Dinosaurs
MOES 52: Geology of Iowa
MOES 53: Radiometric dating is used to determine the age of rocks.
MOES 54: Radioactive Decay
MOES 55: Radioactive Decay
MOES 56: Natural evidence of Earth's past.
MOES 57: Tree Rings
MOES 58: Rock Layers and Fossils
MOES 59: Ice Cores
MOES 60: The Rise of Oxygen in the Earth’s Atmosphere
MOES 61: Evolution of Earth's Atmosphere and Oceans
MOES 62: ACT Prep – Mountain Sediment
MOES 63: ACT Prep - Metamorphic Rocks
MOES 64: Main Ideas and Vocabulary
MOES 65: Jeopardy
4.1. Radioactive dating is used to determine the age of rocks.
Objectives:
(a.) Determine the age of a fossil or rock using radiometric dating.
Links/Sources
4.2. Fossils, rocks, ice and tree rings are natural evidence of Earth’s past.
Objectives:
(b.) Use tree rings to determine the age and environmental conditions of an area.
(c.) Use ice core samples to determine past environmental conditions.
(d.) Determine the age of rock layers based on geologic principles.
Links/Sources:
PBS Stories in the Ice (link)
Scientific American: How are past temperatures determined from an ice core? (link)
4.3. The geologic time scale shows Earth’s history.
Objectives:
(e.) Explain the importance of key events in Earth’s history and their impact on the planet.
(f.) Describe how the Earth’s atmosphere and oceans formed and how they have changed over time.
(g.) Explain the importance of the formation of the ozone layer by cyanobacteria.
(h.) Site evidence that explains how the dinosaurs became extinct.
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