Bubble vs. Chewing Gum

Libby thought that bubble gum must have more sugar than chewing gum. Both types of gum lose sugar (mass) after chewing. With this information in mind, Libby did the following investigation.

Procedure:

1. Chew a 3-gram piece of bubble gum for 15 seconds.
2. Measure the mass of the chewed bubble gum and record.
3. Repeat steps 1 and 2 for chewing gum.
4. Repeat steps 1, 2, and 3 two more times with each type of gum.
5. ______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Responding Variable:

________________________________________________________

Name:_________________________Date:____________Period:________Score:______

WASL QUESTIONS

5. What could Libby do to be more sure of the result of her investigation?

A. Repeat her investigation

B. Research the gum

C. Change the variable

D. Change gum types

6. The results of the investigation were different than Libby had predicted. How do scientists report results when their results are different from their prediction?

1. Scientists report the results that support their predictions.
2. Scientists report all results, even results that are unexpected.
3. Scientists change the results to match their predictions.
4. Scientists change their prediction to match their results.

7. The sugar in the gum is one type of food used by humans as a source of matter and energy. What type of energy is stored in sugar?

1. Chemical energy
2. Kinetic energy
3. Heat (thermal) energy
4. Electrical energy

8. Which human body system breaks down the sugar in gum for Libby to grow and be healthy?

1. Circulatory system
2. Nervous system
3. Digestive system
4. Respiratory system

9. Each piece of gum had a mass of 3.00 grams before being chewed. After being chewed, the mass of each piece was less than 3.00 grams. Where is the mass that was lost by the gum?

1. The mass lost by the gum was transformed into energy.
2. The mass lost by the gum was transferred to the chewer.
3. The mass lost by the gum disappeared due to the friction of chewing.
4. The mass lost by the gum became thermal (heat) energy in the chewer.

10. Libby, like all humans, obtains energy from food like the sugar in gum. How do plants obtain energy?

1. Plants get energy from the soil.
2. Plants get energy from water.
3. Plants get energy from light.
4. Plants get energy from air.

11. Michael noticed that Libby was not chewing the gum the same way each trial. Explain how chewing the gum differently could affect the results of the investigation.

Be sure to:

• Describe how chewing the gum could vary.
• Describe how this difference would affect the mass of the gum after chewing.

Use words, labeled pictures, and/or labeled diagrams in your answer.

12. Libby wondered just how quickly chewing gum loses its sugar (mass) while chewing. She asked, “How does the chewing time affect the mass lost by chewing gum?”

Plan an investigation to answer Libby’s question.

In your plan, be sure to include:

• Hypothesis
• Materials
• Procedure that includes:

Ø Logical steps to do the investigation

Ø One controlled (kept the same) variable

Ø One manipulated (changed) variable

Ø One responding (dependent) variable

Ø How often measurements are taken and recorded

Question: how does the chewing time affect the mass lost by chewing gum?

Hypothesis:

Materials:

You may use the space below for a labeled diagram to support your procedure:

Procedure:

Use words and pictures (labeled diagram) to record observations.

Type of Gum and Mass Lost

Type of Gum	Mass (grams)		Mass Lost (grams)
	Before (B)	After (A)	Loss (B-A)	Average Loss
Bubble
Bubble
Bubble
Chewing
Chewing
Chewing

________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Conclusion: (Remember : RAPPIN) ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________