Your students will oohh and ahh when they do this lab! And! It’s integrated, so it includes many concepts! Mainly energy, weather and climate change.
First students place colder, denser water on top of warmer, less dense water. They see conduction, convection and energy transfer happen. They can see the water molecules mix, move and the color change.
Then students place the warmer, less dense water on top of the colder water and they don't mix! They don’t mix because of density and it will stay this way for hours!
You can use the lab as phenomena (which is a big deal in NGSS) and then have the students read the close reading that’s included or use the reading as a scaffolding before the lab. I prefer doing a read-around with the class first and have class discussions about the concepts as a scaffold and then do the lab.
This product includes the following concepts:
• Energy Transfer
• Particle Movement
• Climate Change
• Law of Conservation of Energy
• Kinetic and Potential Energy
• Gravitational Potential Energy
• Energy of Position and Motion
• Two identical bottles (I use Ball mason jars)
• Hot and Cold water
• Two different colors of food dye
• Two trays or paper plates to catch any water spilled
• Plastic cards to separate the bottles
This product includes very detailed teacher notes, close reading, a hands-on lab and a key.
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Here are some other lessons in my store:
Periodic Table Baby Book
Periodic Table Computer Lab
5E Oobleck Lab
Elements, Atoms, Compounds and Molecules Card Sort
Flipping the Classroom Periodic Table Frayer Models
Chemistry of Ice Cream
States of Matter Warm Ups
Conservation of Mass Lab
Dancing Raisins Lab
Physical Science Scaffolded Notes
States of Matter Computer Lab
STEM Roller Coaster Lab
NGSS Speed, Time, Distance, Acceleration and Graphing Worksheets
Physics Speed, Time and Distance Problems
STEM Paper Airplane Competition
Physical Science Scaffolded/Guided Notes for a Year + 8 PREZIS
Balloon Rockets Lab
NGSS Kinetic and Potential Energy Card sort
Forces Warm Up
Energy Warm Up
Roller Coaster Energy Warm Up
Natural Selection Computer Simulation
Water Cycle Card Sort
Genetic Variation Lab