How does it work?

The marker leaves behind mixture of pigments and a type of alcohol mixed together. The alcohol dissolves and the pigments are left behind as a solid. Glass is so smooth that the solid slides right off when it gets wet!

Student Work

Please prepare the following materials for Fun with Science in the coming lesson

1. Cardboard paper

2. blue tack

3. toothpick

Reference: www.sciencefun.org

How does it work?

The balancing bird is a toy that has its center of gravity located at the tip of the beak. The center of gravity (also called the center of mass) is a special point on an object. It's the point at which the mass of the body is perfectly balanced. For example, the center of gravity of a pencil is in the middle. So you can hold a pencil up using just one finger if you place it underneath the middle of the pencil. Similarly, you can hold the bird up using one finger as well, if you place it underneath the beak.

Student Work

How does it work?

This amazing experiment works on surface tension. Surface tension is a thin sheet or skin formed by water. Surface tension tightly holds the water molecules together. Thus, if the surface tension of the water remains undisturbed, it will be able to support the paper clip. Thus, the paper clip is not actually floating, it is simply being held on the water surface due to surface tension. Several insects such as grasshoppers and water spider use this “sheet” to walk across water.