Thursday, June 16, 2022
HomeHomeschoolFinding out Sedimentary Rocks ~ A Full Lesson Plan

Finding out Sedimentary Rocks ~ A Full Lesson Plan


If there’s one factor my youngsters by no means get uninterested in studying about – it’s rocks. We had a lot enjoyable learning sedimentary rocks final week! I like how a lot pleasure can come from such a easy ingredient of nature.

Right here’s a rundown of our lesson on sedimentary rocks and the books and assets we used:

How Sedimentary Rocks Kind

We started the lesson with this coloring web page from The Rocks and Minerals Journal, which explains how erosion and weathering trigger sediment to maneuver, settle and ultimately compact and type sedimentary rock. We adopted this up with a hands-on experiment, which you’ll learn extra about under.

Investigating Rock Samples

Subsequent got here the boys’ favourite half – experimenting with their rock samples. For this, we used sedimentary rocks we’ve collected from nature hikes, in addition to this rock package, which incorporates 5 totally different sedimentary rock samples.

(Our sediment rock flash playing cards had been additionally very helpful for this a part of the lesson.)

First, they carried out a permeability check to see if their rock samples had been permeable or impermeable. Utilizing a pipette, they squeezed a drop of water onto every pattern. Curiously, virtually all of their sedimentary samples had been permeable (the water soaked in).

Subsequent got here the scratch check. For this, they used their fingernails, a carpentry nail and sandpaper to check the hardness of their samples. We mentioned what number of sedimentary rocks are smooth, and a few are even crumbly. A sandpaper block was an attention-grabbing method to see the colour of every rock because it was scratched.

Lastly, they carried out the acid check. Since I clearly don’t let my youngsters play with actual acid, we used vinegar – which isn’t sturdy sufficient to dissolve rocks, however it may well present a really satisfying fizz. The boys actually liked dropping every pattern into the vinegar and seeing which of them produced bubbles.

We found a attainable fossil in our limestone pattern, as one whitish space of the pattern was producing a considerable amount of bubbles! (The calcium carbonate within the fossils make some sedimentary rocks fizz after they are available contact with the vinegar.)

Making a Sediment Jar

After all, it wouldn’t be a correct science lesson with out an experiment!

Find out how to make a sediment jar:

You will want:

  • A big glass or plastic jar with a lid
  • A big handful of sand
  • Giant handful of gravel
  • Giant handful of pebbles or small rocks
  • Water

Set your jar on a flat floor. Pour the sand into the underside of the jar, adopted by the gravel, then lastly pour within the small rocks. Fill the jar virtually to the highest with water. Screw the lid on as tightly as you may (safe it with duct tape in case your lid isn’t tight).

Shake the jar nicely, then place again on to the floor. Observe what occurs because the layers settle. You need to see the lighter, finer sediments forming on the highest layer – that is known as the “fining up” sequence and is a geologic strategy of how sedimentary rocks type over time. You might also discover silt within the water, which can ultimately settle.

This additionally led to a dialogue of the place sedimentary rocks usually type – in water!

Extra Sedimentary Rock Experiments

We didn’t have time to do further experiments, however listed below are some that look enjoyable to strive:

Rock Layers: https://www.generationgenius.com/actions/sedimentary-rock-formation-activity-for-kids/

Edible Sedimentary Rocks: https://www.caveofthemounds.com/2020/11/02/science-experiment-stream-table-2/

Rock in a Cup: https://www.training.com/science-fair/article/making-a-rock-in-a-cup/

Sedimentary Rock Books

We used two books for this unit of examine:

The Road Beneath My Toes

This one isn’t particular to sedimentary rocks, nevertheless it’s an ideal guide concerning the totally different layers of rock under the Earth’s floor.

The place is the Grand Canyon?

Sedimentary rocks type the center and prime layers of Grand Canyon. This was an ideal guide for my older kiddo to find out about how this huge canyon was fashioned.

For a complete examine into all issues rocks, take a look at my new Rocks + Minerals Journal!

**I’m an affiliate of Amazon, which suggests I obtain a small fee from purchases by way of product hyperlinks, which helps preserve this web site going. I solely write about issues I’m really obsessed with, and merchandise I truly suggest and use for our household.**

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