Grade Level: 7th
Duration: 30-45 minutes
Summary:
Students explore the effect of chemical erosion on statues and monuments. They use chalk to see what happens when limestone is placed in liquids with different pH values. They also learn several engineering approaches to reduce the effects of acid rain.
Objectives:
- Give examples of common acids and bases.
- Describe acid rain and chemical erosion and how they affect the environment.
- List things engineers do to reduce acid rain and its effects.
Materials:
- Lemon juice
- White vinegar
- White chalk
- Small cups
- Litmus paper
- Worksheet
- Tap water
Adapted from “The Effects of Acid Rain” by TeachEngineering.org.