Materials
Red, green, and yellow apples
Chart paper
Markers
Knife
Zipper closure plastic bag
Instructions
1. Look at the apples with the children and ask them to predict which ones they think will taste the best. Chart their responses on a bar graph labeled "Predictions."2. Cut the apples into pieces and encourage the children to taste each kind. Chart the children's preferences and label the graph "Preferences."3. Compare the two charts.4. Next, talk to the children about oxidation. What is the purpose of the skin on the apples? Brainstorm possible answers.5. Explain that when an apple is peeled, it turns brown, gets mushy, and so on. This happens when oxygen mixes with a peeled apple. However, this doesn't happen when the apple is unpeeled.6. Set up an experiment by placing an unpeeled apple, half of an apple, and another half of an apple in a plastic bag on a table. Note the results. Try this experiment with different kinds of apples to see if there are any differences.
