How can you figure out where a rock came from?

How can you figure out where a rock came from?
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# Unit Review: Anchoring Phenomenon
  • How did the land at the Ashfall Fossil Beds change over time?
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# Unit Review: Key Concepts
  • There is a pattern to the location of volcanoes around the world.
  • Ancient volcanoes break the pattern, showing the earth has changed over time.
  • There are two types of volcanoes--one with thick explosive lava, and one with thin flowing lava.
  • A mountain can be broken down into smaller rocks, sand, and gravel over time.
  • Landslides happen when loose rock or earth slides down a mountain or cliff.
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# Unit Review: Ashfall Fossil Beds

If you haven't completed your final Ashfall Fossil Beds Explanation, now is the time to do so. We'll review what happened at the Ashfall Fossil Beds in the next few slides.

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Step 1: 11 million years ago, prehistoric animals live on the land that is now Nebraska.

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Step 2: A thick lava volcano erupts in Idaho (1,000 miles away) and ash travels to Nebraska.

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Step 3: Animals at the Ashfall Fossil Beds slowly suffocate, die, and are covered with ash.

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Step 4: Weathered rocks from nearby mountains are carried by rivers and cover the fossil layer over time.

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Step 5: Heavy rainfalls wash away the earth over time.

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Step 6: The jawbone of a baby rhinoceros was discovered in a ridge on a farm in Nebraska.

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A group of geologists spent the summer collecting samples of rocks found in many locations. They took photos of each place that they collected rocks and marked that place on a map. They carefully labeled where each rock came from.

Unfortunately, on the trip back home, a box of rocks fell over. Every rock was separated from the label that identified where it had been found. It’s a disaster for the research project!

In today's activity, you'll use your knowledge of how rocks form and how the earth changes over time to help geologists solve this puzzle.

We'll walk you through it, step by step.

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Image & Video Credits

Mystery Science respects the intellectual property rights of the owners of visual assets. We make every effort to use images and videos under appropriate licenses from the owner or by reaching out to the owner to get explicit permission. If you are the owner of a visual and believe we are using it without permission, please contact us—we will reply promptly and make things right.

Other
Lakeshore beach gravel by Image used under CC BY 2.0 from Flickr.com: James St. John
PPPencil02 by Image used under CC0 from wikimedia: JohannPoufPouf
Petrified wood with geode by Image used under public domain from the national parks service
Rhyolitic Pumice by Image used under CC BY 2.0 from Flickr.com: James St. John
Structured crinkled gyprock by Image used under CC BY 2.0 from Flickr.com: James St. John
Vesicular porphyritic olivine basalt by Image used under CC BY 2.0 from Flickr.com: James St. John
male female house sparrow passer domestic by Image used under license from Shutterstock.com: Eric Isselee
Credits

Activity Prep

Print Prep

In this performance task, students will analyze four rocks and the maps and photos from different locations to determine where each rock was found. They will support each of their claims with evidence.

Preview activity
Number of students:
Story of a Rock worksheet 1 per student
Story of a Rock Answer Key teacher-only resource 1 per class
Story of a Rock Rubric teacher-only resource 1 per student
Prep Instructions

In this performance task, students use their knowledge of how rocks form and how the earth changes over time to help geologists solve a puzzle. They analyze maps and photos from four locations to figure out which rocks were found in each place. Then, they support their claims with evidence. If you have time to extend the performance task, there is an optional writing extension in the last step.

Print out worksheets

Each student will need:

The Story of a Rock Answer Key will help you support students throughout the unit. Students are not expected to have these answers until the end of the unit.

Unit Review

20 mins

Hands-On Activity

120 mins

Extend this lesson

Download this Lesson to your device so you can play it offline: