Keystone eMedia

Expand/Collapse Keystone eMedia


This collection of resources from Pennsylvania public television stations provides free, rich multimedia resources.

  • Liquid Assets | Wastewater

    Learn how water contaminated with raw sewage can be purified in this video from the WPSU documentary Liquid Assets.

    Grades: 6-12
  • What Holds a Molecule Together?

    This video/animation illustrates that a molecule is a small group of atoms that is stuck or bonded together with electrons. Dr. Chris Muhlstein introduces the idea of three primary types of bonds: ionic, covalent and metallic; animations show how they form at the atomic level, and give everyday examples.
    Grades: 9-12
  • Using Nanoscience to Understand the Properties of Matter

    Atoms and molecules are the basic units of matter. The properties of matter that you can see and touch are dictated by the kinds of atoms and bonds that make it up. But if atoms are too small to see, how can scientists figure out their properties? The video shows some special tools that allow scientists to take pictures of and make changes to very tiny or nanoscale materials.
    Grades: 6-12
  • Electromagnetism and a Simple Motor (HS) | Explore Materials

    In this lesson students will explore what happens at the atomic level when electricity and magnetism interact to create a force. In a lab they will watch a video about moving atoms, build a simple motor and make observations and predictions about ways to manipulate its operation.

    Grades: 9-13+
  • Turning Electricity and Magnetism into Mechanical Work with a Simple Motor (MS)

    Students will explore what happens at the atomic level when electricity and magnetism interact to create a force. They will watch a video about electrons in motion, build a simple motor, and observe and predict ways to manipulate its operation.

    Grades: 5-8,13+
  • Taking Pictures of Things You Can't See

    Dr. Chris Muhlstein explains the challenge of studying materials that are too small to see with the naked eye. The technique some scientists use to observe individual atoms is similar to the technique of using touch to find out the size, shape, and location of objects in a dark room. By using a very small, sharp sensor, scientists can create an image of atoms.
    Grades: 6-12
  • The Structure of Materials

    Structure of matter.

    Grades: 9-12
  • Structure and Property Changes of Water

    Dr. Chris Muhlstein explains the structure and property changes of water. He discusses the atomic arrangement of water by observing how it changes as it goes through each phase (solid, liquid, gas).
    Grades: 6-12
  • Structure-Property Relationships

    In this lesson, high school students will explore the structure and property changes of water through videos and classroom discussion.

    Grades: 9-13+
  • Moving Atoms | Explore Materials

    A materials science and engineering professor, Dr. Chris Muhlstein of Penn State University, explains how to rearrange atoms without touching them with your hands.

    Grades: 6-12
  • Mechanical Properties of Chocolate: How Strong is your Chocolate?

    *Materials such as metals (aluminum, iron, copper, etc.), ceramics (silicon carbide, porcelain) or polymers (milk jugs made of polyethylene) are tested by scientists and engineers to reveal certain mechanical properties.

    Grades: 6-8
  • Mechanical Properties of Chocolate: How Hard is your Chocolate?

    You already know that certain materials are harder than others; in fact, you prove it everyday when you chew your food and your teeth don’t break (because your teeth are harder than the foods you chew). 

    Grades: 6-8
  • Grades: 6-8
  • How Hard is Chocolate?

    You already know that certain materials are harder than others; in fact, you prove it everyday when you chew your food and your teeth don’t break (because your teeth are harder than the foods you chew). 

    Grades: 9-12
  • Fracture Surfaces of Paperclips

    A materials science and engineering professor, Dr. Chris Muhlstein of Penn State University, explains that the fracture surface of a paper clip, is a map of how it failed to a trained eye. He invites us to view a variety of surfaces with a virtual microscope.
    Grades: 6-12
  • Electrons in Motion | Explore Materials

    An engineering professor tells how electrons flowing through a wire can be turned into mechanical work. Learn more from Explore Materials.

    Grades: 6-12
  • Do Materials Get Tired? Intro

    A materials science and engineering professor, Dr. Chris Muhlstein of Penn State University, reminds us that matter is made up of atoms, and atoms dictate the properties of materials. He explains that mechanical engineers measure the stress a material can take until it breaks. The ultimate for Dr. Muhlstein would be to make a material that will repair itself; he reminds us that our body can do this.
    Grades: 6-12
  • What is a Molecule?

    This video/animation shows that a molecule of water is made up of oxygen and hydrogen atoms. When oxygen and hydrogen atoms exist alone, their properties are different from the properties they have when they are chemically combined to form a water molecule.
    Grades: 6-12
  • What is Matter?

    This video/animation defines matter, mass, and volume using water as an example. The size, electrical charge and location of the subatomic particles of matter are described. Different types of atoms are called elements and organized in the periodic table. What happens to the properties of atoms when they exist alone or together?

    Grades: 6-12
  • Sustainable Water Use | Liquid Assets

    Learn how Las Vegas is transforming its water infrastructure. A desert community, Las Vegas is reducing water consumption and re-using wastewater, making optimal use of limited water resources. The endeavor has been so successful that the city has reduced its water usage despite its increasing size. For them, water conservation is a way of generating more water. One of the city’s major projects is treating and re-using its water for purposes such as irrigation, which allows the city to sport lush grasslands in the middle of a desert.

    Grades: 6-8