## Rocks, Fossils, and the Law of Superposition Sequencing Activity

Objectives:

• Sequence information using items which overlap specific sets
• Relate sequencing to the Law of Superposition
• Show how fossils can be used to give relative dates to rock layers.

Materials:

• Fossils, Rocks, and the Law of Superposition Google Slides – this will walk you through the lesson step-by-step
• additional lesson plan details on their site
• print and cut apart the 8 cards for each part of the lesson
• to set up the cards, use large 4×6 index cards and store in ziptop bags.
• on one side of the index cards, glue on the nonsense letters
• on the reverse side, glue on the fossil layers
• laminate for durability
• Replace the letters for each fossil layer, see my ppt for new random letters
• spelling out the word “ORGANISM is way too easy for students to figure out and they will not really have a chance to work on the activity with the depth of thinking and problem solving that you want them to do
• be sure to stagger cards so that the order of the cards is not the same, otherwise they will flip over the cards and have the answer for part 2
• Notes HandoutLaw of Superposition Notes (pdf) students will take notes and record their answers on this handout.

Tips for this lesson:

This is a fantastic lesson and I have used it successfully with both 5th and 6th grade students. When introducing this lesson I use the analogy of a laundry hamper, or in most cases, the pile of dirty clothes on the floor in their bedroom. Today’s clothes would go on top of the pile, each day adding a layer of dirty clothes. The older clothes would be on the bottom of the pile, kind of like a timeline of what they wore this week. When that laundry is collected and moved to the laundry room, the layers would get disrupted. With rocks, the layers form on top of each other, and the older layers are on the bottom. We then brainstorm how those layers can be disrupted: earthquakes, tectonic plates moving, landslides, digging, etc…

For this activity, they have to figure out the pattern of how these layers are formed, and there are clues in each layer, they just need to know what to look for. For the nonsense letters, there is a pattern that connects all the layers together. Many will think it is alphabetical, but I tell them that it is not. Once they have worked on it a few minutes, I have them share their theories. Once each group has shared their theory, I give them the clue. And suddenly, the pattern is clear now that they know what to look for. Using the same strategy, they will then sequence the fossils on the reverse side of the index cards.

## Pangea Puzzle Activity

Essential Questions:

• How has the surface of our planet changed over time?
• What clues are provided to show that the surface of our planet has changed?

Materials (per 2-3 students): I make these ahead of time to save time in class and I can reuse them for each class.

• Foam Board
• Glue stick
• Disposable scalpel or sharp craft knife
• USGS landmasses (Pangaea activity PDF)
• Blue construction paper
• Ziptop bag

Procedures:

Preparation

1. Print out and glue landmasses to a piece of foam board
2. Carefully cut out each land mass and fossil key
3. Place into zip-top bag

Class Activity

1. Have students place the landmasses into their current geographic positions on top of the blue construction paper.
2. What do they notice about the landmasses? Discuss.
3. Ask students: “Do you think you can make one large landmass using the clues provided?”
4. After a few minutes, check on their progress, what did they do first? What was giving them difficultly? Encourage students to try alternate possibilities.
5. Discuss findings, what possibilities did they come up with?
6. Ask students how the landmasses moved to their current position- accept all possibilities.
7. Ask students: “Are the landmasses are still moving?”
8. Show “Animated Life: Pangea” by the NYTimes
9. Have students try to create Pangea again.
10. Discuss.

The Pangaea Pop-Up video is a great video to show also: