Who is on Top?
Student will determine which substance has a higher density: oil or water.
Context for Use
Resource Type: Activities:Lab Activity
Special Interest: Quantitative
Grade Level: Middle (6-8)
Description and Teaching Materials
-1 Quart jar
-Blue food coloring dye
-Ice cube tray
-10 ounce clear plastic cup
1. Fill quart jar with water and add blue colored dye
2. Pour the blue liquid into ice cube tray and put in freezer; water should freeze in two hours
3. Fill each students' plastic cup 3/4 full of cooking oil
4. Give each student a blue ice cup and tell them to gently place it on top of the oil in the plastic cup
5. Students observe the position of the ice in the oil and draw a picture on paper right after they have placed the ice cup in the oil
6. 5 minutes later, students should draw another picture based on what they see happening
Teaching Notes and Tips
George is at home and going to fry some chicken in a frying pan. He puts the oil in the pan and turns the stove on. He walks away to watch some TV. He comes back 10 minutes later and the oil inside the pan is on fire. Why should he not put tap water on the oil fire?
6.II.B.2 - Mixtures and pure substances