Showing results for "Lisa" in Physics

A rubber duck floats in the tub. A rock sinks to the bottom of a lake. Why do some objects float and others sink? Find out in this series about materials and their properties.

A pencil is stiff. A rubber band is bendable. Why are some objects stiff and others bendable? Find out in this series about materials and their properties. Informative, at-level text helps listeners understand the differences between stiff and bendable objects.

A piece of silk is smooth. Tree bark is rough. Why are some objects smooth and others rough? Find out in this series about materials and their properties. Informative, at-level text helps listeners understand the differences between smooth and rough objects.

A bowling ball is heavy. A feather is light. Why are some items heavy and others light? Find out in this series about materials and their properties. Informative, at-level text helps listeners understand the differences between heavy and light materials.

A nail is hard. A cotton ball is soft. Why are some objects hard and others soft? Find out in this series about materials and their properties. Informative, at-level text helps listeners understand the differences between hard and soft materials.

You push your friend while they swing. You pull open a door. What happens when you push or pull an object? Let’s investigate pushing and pulling forces!

Behind every long stride, high-flying pole vault, and perfectly controlled discus throw, science is at work. As a high jumper takes off, potential energy is converted into kinetic energy. A discus thrower builds up momentum while spinning. Find out how science is involved in Olympic track and field events and how athletes take science into account in their quest for the gold medal.