–Warm Up: Charlie wanted to find out if temperature of water would affect the amount of time it takes to freeze. He poured 200ml of different temperatures of water and poured them each into the same type of plastic ice tray. He placed them in the same freezer at the same time and recorded the time it took to freeze the water.
1. What is the independent variable?
2. What is the dependent variable?
3. What are the controlled variables?
–Small Groups-Compare: Travel Time of Lahars Graphs and questions (p. 213-214 SE)
–Preview vocabulary & Checking Up questions (214-216)
–Reading groups: p 214-216
Think aloud and discuss ways to remember important details as we read.
Discuss Checking Up Questions (p216)
–Create a graphic organizer for important information (refer to the Think About It (p. 212): “How do volcanoes affect the biosphere?”