The premier destination for fun science projects & experiments for kids grades K-8 since 2010!


Use cornstarch to make a substance that behaves like a solid and a liquid

Suitable For

Grade 4



Time Required

 <24 Hours



What’s it about?

The large land masses of the earth are slowly but constantly drifting about the earth’s surface. The surface layer of the earth is called the ‘crust’ and just below is a layer called the ‘mantle’.

These layers are both made of solid material, but a small layer in between the crust and the mantle exists called the ‘partial melting zone’. This layer consisting of a strange putty-like liquid, and is the reason the earth’s crust ‘slides’ around on top of the mantle layer. In this science experiment we will create is similar putty-like liquid that behaves both like a solid and a liquid:

Topics covered

Mantle, Partial melting zone, Viscosity

What will I need?

  • BOWL

Procedure (Method)

Unfortunately, this section is only available in the e-book version of the project.

How does it work?

Unfortunately, this section is only available in the e-book version of the project.

‘Viscosity’ is the term used to describe the ability of a liquid to flow, in other words, the level of internal friction within a liquid affecting its rate of flow. In the earth’s ‘partial melting zone’, the high pressures that exist turn the rock into a partially liquefied substance of high viscosity. You can say it’s a kind of putty-like liquid sea, upon which the continents drift!

Like the sound of it?

Why not check out the full worksheet in one of our popular e-books?

This particular science project can be found in any of the following Experiland e-books:

Experiland e-books contain detailed steps, including illustrations, to complete the science projects from start to finish.

Science project ebooks for kids

Experiland's science e-books contain a diverse range of several hundred of exciting science projects, ideas and experiments.

A project introduction and background, complete listing of required materials, step-by-step instructions on how to carry out the project, why it works, learn more section, as well as a science glossary with all the relevant terms make up each of the all-inclusive science project worksheets in our e-books!

Get your e-Book!