- Gases and liquids are made of molecules or inert atoms that are moving about relative to each other.
- In a liquid, the molecules are constantly in contact with others; in a gas, they are widely spaced except when they happen to collide. In a solid, atoms are closely spaced and may vibrate in position but do not change relative locations.
- Do Now– Get out your science notebook and open to page 31. Discuss with your group- Is the speed of molecules different in hot water than in cold water? What did you observe as evidence?
- Science Friday– The Fungi in Your Future
- Model & Conclusion- On page 30 of your science notebook, draw a model of water molecules in cold, room temperature, and hot water based on your observations of the investigation of food coloring in hot and cold water. (Periods 4, 6, & 7) Make a conclusion about whether the speed of molecules in hot water is different than in cold water and use your observations as support. (Periods 4, 6, & 7) Observe animation of heating and cooling a liquid to adjust your model & conclusions (Periods 2, 4, 6, & 7).
- Investigative Phenomenon–Volume Increase in Graduated Cylinder– Using what you learned about molecular motion and temperature in the food coloring investigation, create a model to explain what is happening with the increase in water volume in the graduated cylinder. Why do you think the volume of water increases when the water is heated? (Write-Pair-Share). Trim and tape your model as a flip page to p.30.
- Driving Questions Summary Table– Complete the Summary Table on pages 26-27 for the Molecules in Motion Activity