Halloween Lava Lamp

Halloween is a fun time of year to try out science experiments with a spooky twist


Exploring liquid density is the perfect kitchen science experiment because you typically can find everything you need in the pantry, under the sink, or even in a bathroom closet. Often you can use liquids you have on hand. 



– Jar or beaker
– Cooking oil
– Water
– Food coloring
– Alka seltzer tablets or generic equivalent
– Spooky Halloween accessories (We used some spooky spiders from the dollar store!)


Lava Lamp Tip: Set up this experiment on a plastic tray or dollar store cookie sheet to minimize the mess.
STEP 1: Fill a jar 3/4 of the way with oil.
STEP 2: Now go ahead and fill up the rest of the jar with water.
Make sure to observe what happens to the oil and water in your jar as you add them.
These steps above are great for helping students practice their fine motor skills and learn about approximate measurements. We eyeballed our liquids, but you can actually measure out your liquids.
STEP 3: Observe what happens when you add drops of food coloring to the oil and water mixture. We went with dark food coloring for our Halloween theme.
halloween lava lamp
image 2021 10 04 150716
STEP 4: Now add an Alka Seltzer tablet and check out what happens. You can repeat as desired with another tablet.
Watch out this can also get messy especially if the kids sneak in extra tablets.
Did you know that oil and water don’t mix because they don’t have the same density?


There are quite a few things going on here with both physics and chemistry! First, remember liquid is one of three states of matter. It flows, it pours, and it takes the shape of the container you put it in.
However, liquids have different viscosity or thicknesses. Does the oil pour differently than the water? What do you notice about the food coloring drops you added to the oil/water? Think about the viscosity of other liquids you use.

Share your Halloween Lava Lamp!

Share your projects with us at rsa@edupix.org so we can share it with everyone!

Attention all RCS parentS

Due to the forecast of increment weather on tomorrow, Friday, January 21, 2022, tomorrow will be a Remote Learning Day for all students, teachers, and staff. This notification is also available on local news stations WBTV-3 and WSOC-TV. Students are expected to engage in “Interactive Remote Learning” with their classroom teacher at 9:00am via Google Meets or Zoom per teacher’s instruction, as attendance will be taken and recorded

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