Grade Level: 8th; Type: Physical Science
What is the project about?
What are the goals?
- What is oxidation?
- What is the result when iron and copper undergo oxidation?
- What is the result when fruits and vegetables undergo oxidation?
- How can oxidation be prevented?
- Lemon (1/2 lemon per student)
- Bowl (1 per student)
- Spoon (1 per student)
- Paint brush (1 per student)
- White paper (1 piece per student)
- Light bulb (a small lamp works best)
Where can the materials be found?
Most materials can be found at a grocery store or all-purpose store (such as Target)
- Squeeze juice from the lemon into the bowl.
- Add a few drops of water to the lemon juice.
- Mix the water and lemon juice with the spoon.
- Dip the bristles of the paint brush into the lemon juice/water mixture.
- Write a message or draw an image onto the white paper.
- Allow the paper to dry completely. The message or image should be completley invisible on the paper.
- Hold the paper very close to the light bulb (lamb) - the paper should heat up from the light bulb. *Adult supervision required*
- Record observations and explain 'magic' of what you see.
Terms/Concepts: The concept of oxidation and its effects on various materials is essential. The definition of electrons and oxygen molecules should be reviewed as well.