Students will measure the length, width, and height of a textbook to review how to measure correctly. Students will calculate the volume of the book. Volume = length x width x height.
Video, “Our Density Song.”
Students will sing and review the definition of density by singing along with the video of middle school students. Students will find the density of the book.
Students will begin “Gummy Bear Lab” by following directions on the form. Depending on class experience, the teacher may want to have students conduct each step together as guided inquiry or may choose to let this be an inquiry lesson.
Question: What do you think will happen to a gummy bear when you put it in water over night?
Plan: Choose one gummy bear. Take a pencil and draw around gummy bear on paper before continuing on. Put the bear in a cup labeled with your name and class period. Use the equipment available to measure your gummy bear and record the data in the chart for Day 1.
Measurements: Measure to the nearest tenth of a centimeter.
Measure the length from the top of its head to the bottom of its feet.
Measure the width of the widest point across the back of the bear.
Measure the height from the front to the back at the thickest point.
Calculate the volume by multiplying the length, width, and height.
Measure the mass using a triple-beam balance or other scale to the nearest tenth of a gram.
Calculate the density by dividing the mass by the volume. D = M/V
Add 50 ml of water to the cup and allow it to sit overnight. Place cup in designated area.
Make sure students record data on a chart.
On Day 2, carefully remove the gummy bear from the cup of water and use a towel to dry it off to prevent it from dripping.
- Repeat the measurements, and record your data in the correct portion of the chart.
- Subtract the amount of change for each measurement and record in the chart.
- Students will explain the difference in the size of the gummy bear.
Elaborate/Extend: Students will answer questions either on paper or via computer email or app.
- Was your hypothesis correct? Why or why not?
- Which change is greater, volume or mass? Explain.
- Was there a change in density? Why?
- How do your results compare to those of your classmates?