Phases of Matter Lab Activity - Effect of Pressure on State of Matter

Students will manipulate cornstarch and water and work to determine if it is a solid or a liquid based on what they know of the phases of matter.

"Oobleck" (a common name for this substance) falls somewhere between solid and liquid.

This phases of matter lab is so fun and engaging, your students will talk about it forever. It is how I teach my students about the effect of pressure on state of matter. It is a great segue piece to get into the compressibility of gases as well!

WHAT’S INCLUDED

• Lab activity: pre and post lab questions and a written conclusion
• "How to Write a Chemistry Lab Report"
• Conclusion sentence starter prompt for differentiation
• Answer key with sample responses

HOW TO USE IT

• I typically have my oobleck prepared when students arrive:
• I use 4-5 pounds of cornstarch along with water.
• I split this mega-batch into 5 aluminum pans and set at group tables for my students to discover and play with.
• I typically reuse the pans of oobleck all day long.
• When the lab is finished, I set it out to dry and throw it in the garbage the next day.

FEATURES

• Engaging
• Inquiry activity
• Written conclusion to synthesize thoughts
• Pre and post lab questions to help guide students through concept

WHAT MATERIALS ARE REQUIRED?

• Cornstarch
• Water
• Food coloring (to make it look more appealing)
• Containers such as aluminum pans

INTERESTED IN MORE?

You can find this lab activity in my Full Year Chemistry Lab Book.

This product by Kelsey Reavy is copyrighted for single classroom only. This product may not be resold and can be copied for personal use within a classroom only. If you have questions, please email kelsey@kelseyreavy.com © Kelsey Reavy

Please Note: This is a digital product. No physical item will be shipped. After purchase, you’ll receive a link to download your files directly on the order confirmation page, and a download email will also be sent to you.