In science, Grade 7 students design and build their own hygrometers, a simple tool that measures relative humidity. This hands-on project helps students understand how changes in humidity are detected.
The hygrometer works by using human hair, which naturally expands when it absorbs moisture from the air and contracts as it dries. By attaching the hair to a sensitive pointer or scale, students observe and measure these changes to determine the humidity levels in their environment.
This activity combines creativity with scientific principles, allowing students to explore the relationship between moisture and air in a practical and engaging way!