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Creepy density

By 23 Comments

Welcome to our Halloween density demonstration. Density is actually a very cool concept to explore and leads to lots of fun, creative science opportunities too.

What do you think of our creepy liquid layers?

Density tower made with different layered liquids with a Halloween theme.

What you need to make a density tower

Treacle
Golden Syrup
Water
Food colouring
Vegetable Oil
Small items to test for floating

Density Tower Instructions

Pour each liquid into the glass slowly starting with the treacle, then the golden syrup, followed by the water with added food colouring and finally the vegetable oil.

Drop a few small items in and see which layer they float on.

You can in the image above that we have a plastic bug floating on the top, a LEGO brick floating on the water and a paper clip floating on the treacle. Why do they do this?

Layered density jar made with liquids of different densities. Great #Halloween science activity for kids #scienceforkids #HalloweenScience #Halloweencrafts

FREE Science Experiment Instructions

Why does a density tower work?

For a full explanation see my floating and density post.

We’d love to see your creepy or even very pretty density creations.

If you liked this spooky activity, you’ll love our collection of Halloween science experiments, including making fake blood, spooky potions and lots more creepy science for kids!

Make fake blood for a Halloween costume

Don’t forget to check out our other fun science activities for children too!

You might also like my new book Gross Science which is out just in time for Halloween 2020 – slightly later in the UK!

Gross Science - science book for kids - collage of images from the book

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Safety Notice

Science Sparks ( Wild Sparks Enterprises Ltd ) are not liable for the actions of activity of any person who uses the information in this resource or in any of the suggested further resources. Science Sparks assume no liability with regard to injuries or damage to property that may occur as a result of using the information and carrying out the practical activities contained in this resource or in any of the suggested further resources.

These activities are designed to be carried out by children working with a parent, guardian or other appropriate adult. The adult involved is fully responsible for ensuring that the activities are carried out safely.

Reader Interactions

Comments

    • mejaka

      Thanks, Donna! I assume corn syrup can sub for the golden, since that isn’t readily available in the states either. (My favorite granola recipe calls for Lyle’s and I’ve been wondering if it’s worth ordering…currently I sub honey.)

      Reply

  5. Kendra

    I know this sounds stupid, but I just want to make sure that I understand correctly. The molasses won’t mix with the corn syrup? Even if a child shakes it?

    Reply

Trackbacks

  11. […] There are so many amazing science Halloween lesson plans ideas floating around Pinterest that it is hard to choose just one.  Luckily, you don’t have to!  I am going to set up a few science centers for us to explore.  Halloween screams candy so we will experiment to see which liquid dissolves candy first.  While that is dissolving, we will create a ghost pumpkin eruption using one of our jack-o-lanterns. My kids love anything that explodes or erupts.  We will end our science portion of the school day with a creepy density experiment. […]

    Reply

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