Week #2: Liquids & Mixes
- Describe the physical characteristics of liquids including flow and ease of mixing
- Compare water to other liquids
- Observe materials that are water absorbent or water resistant
- Carry out simple procedures
- Measure materials
- Investigate characteristics of mixtures
- Learners shared their observations of the provided liquids, including the smell, color, difficulty in stirring and pouring.
- Learners predicted which liquids would flow the slowest and tested them with an ‘ooze race’.
- Learners created their own mixtures from the provided liquids and tested them for the slowest rate of flow.
- Learners created a layered liquid tower by pouring oil, water, and corn syrup into a cup. They then added an Alka Seltzer tablet and observed how far it sunk and how quickly the bubbles rose.
- Learners observed how the layered liquid tower changed when it was stirred.
- Learners observed what happened when soap was mixed into the layered liquid tower.
- Learners mixed a simple slime from equal parts wood glue, water, baking soda, and contact lens fluid (containing boric acid). Upon observing the characteristics of the slime, learners made a second slime, altering the measurements to create ‘the best slime’.
Questions to Discuss
- What are three ways to describe a liquid?
- What are some ways that liquids behave differently than solids?
- What did you mix together to make your slowest ooze? Why did you choose those ingredients for the slowest ooze?
- Why do you think corn syrup sank to the bottom of your liquid tower?
- When you stirred your liquid tower, what did you observe happen to the corn syrup?
- When making your perfect slime, what was something you did differently from your practice slime?
Things to Try at Home
- Make a list of sticky or slimy materials around your house. What do you use them for? Would you be able to use them like that if they were not sticky?
- Build your own liquid tower using ingredients like honey, corn syrup, milk, vegetable oil, and rubbing alcohol. Test by dropping objects of different weights and see how far they sink (popcorn kernels, grapes, bottle caps, plastic beads, metal washers).
- With the help of an adult, continue experimenting with your slime recipe by changing the order of ingredients or using less of one of the ingredients. How did that change the slime you made? What do you think would happen if you tried adding other sticky ingredients like flour, dish soap, or a different kind of glue instead?
(Some slime recipes use a cleaning powder called Borax instead of contact lens solution as a catalyst (ingredient that makes the change happen). If you try Borax instead, be very careful not to get it in your eye or swallow it).