Discovery Express
  • Welcome!
  • Blog
  • Check out our store!
  • 9 Apples Math Game
  • Your questions answered!
  • About/Contact

Fall fun: Make your own pumpkin slime

10/3/2016

0 Comments

 
Author: Maddie Van Beek

It’s October--the leaves are changing colors, the weather is getting cooler, and you are probably starting to see all kinds of gourds and pumpkins at the grocery store. These days, people seem to like pumpkin flavored ANYTHING. Today, we aren’t going to eat any pumpkin, but we ARE going to use a pumpkin in our science activity to create PUMPKIN SLIME!
Picture
A variety of gourds that you may have seen at local farmers markets or grocery stores.
Last year, we showed you how to create two different kinds of slime. If you missed it, check it out here: http://discoveryexpress.weebly.com/homeblog/two-times-the-slime-fun-with-polymers

When we create pumpkin slime, we are going to follow similar instructions for the first version of slime that we concocted. In this version, the special ingredient for creating slime is cornstarch. 

The slime that you will be making is called a non-newtonian fluid. Newtonian fluids, such as water, do not provide much resistance when stress is applied to them. If you jump in a pool, the water gives way. Non-newtonian fluids change their viscosity or “flow behavior,” when stress or pressure is applied to them. Simply put, this means that the slime acts like both a liquid and a solid. When you poke it or pick it up and roll it into a ball, it feels like a solid. When you stop playing with it, it runs through your fingers like a liquid. Can you think of other substances that might sometimes act like a liquid and sometimes like a solid? 

Check out this video about non-newtonian fluids to see them in action!
Here’s more information about non-newtonian fluids: http://sciencelearn.org.nz/Science-Stories/Strange-Liquids/Non-Newtonian-fluids

According to the link you just read, what other substances besides slime or “oobleck” are non-newtonian fluids? Can you think of any others?

Now that you know a little bit about the science behind the slime, let’s get started!
Picture
This pumpkin is carved into a jack-o-lantern. If you want to have a little extra messy fun, put your pumpkin slime inside your jack-o-lantern!
YOU WILL NEED:

  • One pumpkin
  • Cornstarch 
  • Mixing bowl
  • Spoon
  • Cookie sheet or pan
  • Food coloring (optional: your pumpkin will already color your slime an orangey tint)



Here’s what to do!

  1. Cut the pumpkin in half and clean out the guts and seeds with your hands or a spoon. Put all the pumpkin innards into a mixing bowl. How do the guts feel? Look? Write down your observations.
Picture
Pumpkin "guts"
2. Pour 1/2 cup of water into the mixing bowl and use the spoon to stir the water into the pumpkin guts. Write down your observations. How does adding water to the pumpkin change it? 

3. Measure 1 cup of cornstarch and pour it into the bowl with the pumpkin guts and mix with the spoon until well-blended. What does your mixture look like now? How has the consistency changed? Record your observations. 

4. Optional: add about six drops of food coloring and stir it in. 

5. Place the pumpkin half on a pan or cookie sheet with the hollow part facing upward (The pan is just to keep your play area clean).

6. Now that you have your pumpkin slime all ready to go, dump it back in the pumpkin half for goopy fall play! 

7. Have fun! Pick up your pumpkin slime and play with it! What does it feel like? Look like? Is this what you expected to happen? 


Extension: Try adjusting the amount of water, glue, or starch to see how it changes the quality of the slime.




References:

http://littlebinsforlittlehands.com/pumpkin-oobleck-science-sensory-play/

https://sciencebob.com/make-some-starch-slime-today/

https://sciencebob.com/make-some-starch-slime-today-method-2/

http://serc.carleton.edu/sp/mnstep/activities/35866.html

http://scifun.chem.wisc.edu/homeexpts/gluep.htm

https://en.wikipedia.org/wiki/Non-Newtonian_fluid
Image and video credits, in order of appearance: 

Moore, K.T., 2015. Silverman's Farm. File uploaded from Wikimedia Commons on 10/3/2016. 
https://upload.wikimedia.org/wikipedia/commons/thumb/a/a1/Silverman%27s_Farm.jpg/800px-Silverman%27s_Farm.jpg File used in accordance with the Creative Commons Attribution-Share Alike 4.0 International license. No changes were made.

The Discovery Slow Down, 2013. Non-Newtonian Liquid IN SLOW MOTION! Video uploaded from YouTube on 10/3/2016. 
https://youtu.be/G1Op_1yG6lQ

2009. Pumpkin2007. File uploaded from Wikimedia Commons on 10/3/2016. 
https://upload.wikimedia.org/wikipedia/en/d/d8/Pumpkin2007.jpg File released into Public Domain. 

BradBeattie, 2006. Pumpkin seeds in hand. File uploaded from Wikimedia Commons on 10/3/2016. 
https://upload.wikimedia.org/wikipedia/commons/thumb/e/e8/Pumpkin_seeds_in_hand.jpg/800px-Pumpkin_seeds_in_hand.jpg File used in accordance with the Creative Commons Attribution-Share Alike 3.0 Unported license. No changes were made.

​
0 Comments

Your comment will be posted after it is approved.


Leave a Reply.

    Follow us on Pinterest!
    Picture
    Check out our new game for math education, grades 1-7!

    Archives

    February 2019
    January 2019
    December 2018
    November 2018
    October 2018
    September 2018
    August 2018
    July 2018
    June 2018
    May 2018
    April 2018
    March 2018
    February 2018
    January 2018
    December 2017
    November 2017
    October 2017
    September 2017
    August 2017
    July 2017
    June 2017
    May 2017
    April 2017
    March 2017
    February 2017
    January 2017
    December 2016
    November 2016
    October 2016
    September 2016
    August 2016
    July 2016
    June 2016
    May 2016
    April 2016
    March 2016
    February 2016
    January 2016
    December 2015
    November 2015
    October 2015
    September 2015
    August 2015
    July 2015
    June 2015
    May 2015
    April 2015
    March 2015
    February 2015
    January 2015
    November 2014
    October 2014
    September 2014
    August 2014
    July 2014
    June 2014
    May 2014
    April 2014
    March 2014
    February 2014
    January 2014

    Categories

    All
    Age 10 12
    Age 12 14
    Age 14 16
    Age 16+
    Age 8 10
    Anatomy/Physiology
    Biology
    Chemistry
    Engineering
    Food Science
    Geology/Earth Science
    Health Science
    Math
    Microbiology
    Physics
    Plant Science
    Psychology
    Weather Science

Proudly powered by Weebly