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The National Park Service brings you information on geologic time and how we tell the age of the Earth. Learn about fundamental geologic concepts, view a geologic time module, view a video on the Big Ideas in Geoscience, and look at fossils and rocks throughout geologic time.
Grade Level   K 1 2 3 4 5 6 7 8 9 10 11 12
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2
We know that the dinosaurs went extinct 66 million years ago. But what about other time markers in geologic history? How do we know what organisms lived in the past? How can we show geologic time? Geologic history is told through research done by scientists of the rock, sediment, and fossil records...
Grade Level   4 5 6 7 8
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3
Published in 2006
In this lesson, students are introduced to the theory of plate tectonics and explore how the theory was developed and supported by evidence. Through class discussion, videos, and activities, students seek connections between tectonic activity and geologic features and investigate how the theory of...
Grade Level   6 7 8
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4
Children model how the Moon’s volcanic period reshaped its earlier features.  The children consider that the broad, shallow impact basins — which had formed earlier while it was a “kid Moon” — contained cracks through which magma seeped up. Children use Rice Krispies Treats® to create a...
Grade Level   5 6 7 8
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5
Children, ages 8–13, embark on an exploration of Earth's and the Moon's shared history in this 30 –minute introductory activity for the Explore! Marvel Moon module. They work in groups to determine the order of geologic events  — such as the formation of the Moon and when the bright crater of...
Grade Level   3 4 5 6 7 8
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6
Published in 2017
Explore geologic features through an interactive from NOVA’s Making North America in this lesson plan from WGBH. Observe and gather evidence of geoscience processes such as weathering, erosion, and deposition, that have shaped and continue to shape Earth’s surface at varying spatial and time...
Grade Level   6 7 8
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7
To describe Earth's vast history, scientists use a geologic timescale. They divide it into long segments of time called eras. Each era is further divided into periods. Working in a small team, you will create a poster presentation about one of the periods in Earth's history. You can use classroom...
Grade Level   6 7 8 9 10 11 12
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8
Published in 2007
The Earth's crust is not a solid shell. It is made of thick, interconnecting pieces called tectonic plates that fit together like a puzzle. In this activity, students will: use logic and the evidence to reconstruct the position of large islands and continents as they appeared 220 million years ago;...
Grade Level   5 6 7 8 9 10 11 12
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9
Published in 2005
Students may be able to tell you how long ago dinosaurs lived, but it is difficult to conceptualize that enormous amount of time. The following activity will help students gain an understanding of geologic time.
Grade Level   5 6 7 8
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10
"This hands-on activity requires students to """"visit"""" different K-T boundary sites, evaluate the evidence at each site, find these sites on a map, and predict where the crater is located. It tests a diverse set of skills, including mapping, mathematical scaling, and interpretation of mixed...
Grade Level   6 7 8 9 10 11 12
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