Author

Sarah Medina Page 7

A middle school physical science teacher in Charleston, West Virginia, Sarah Medina builds practical classroom experiments using simple grocery-store supplies. She contributes pieces on introductory physics and chemistry for Biology Insights. She began her teaching career in elementary classrooms, later taking a post working with middle schoolers on concepts like matter, density, and chemical reactions. Medina graduated with a bachelor of science in science education and works regularly to show students how common household items illustrate physical principles.

How Does the Law of Conservation of Mass Apply to Chemical Changes?Chemistry
How Is Mass Conserved in Chemical and Physical Changes?Chemistry
Why Do Oil and Water Not Mix? The Role of Polarity Chemistry
Is the Formation of Bubbles a Chemical Change?Chemistry
Why Is Water Less Dense When It Is in a Frozen State?Chemistry
Is Heat Changing H2O to Steam a Physical or Chemical Change?Chemistry
What Is Easier to Separate a Mixture or a Compound?Chemistry
Does Sugar or Salt Dissolve Faster in Water?Chemistry
Is Salt Water a Solution? The Chemistry Explained Chemistry
Do Water and Gas Mix? The Science of Immiscible Liquids Chemistry
Is Firing a Clay Pot in a Hot Kiln a Physical Change?Chemistry
What Melts Ice the Fastest? Science Fair Project Chemistry
Can Oobleck Dry Out and Be Rehydrated?Physics
Is Salad Dressing a Solution, Suspension, or Colloid?Chemistry
Why Is Ice Less Dense Than Liquid Water?Chemistry
Can Melting Point Be Used to Identify Matter?Chemistry
What Are Suspensions and Colloids?Chemistry
Is Reactivity a Physical or Chemical Property?Chemistry
Are Bubbles a Chemical or a Physical Change?Chemistry
Is Freezing an Exothermic or Endothermic Process?Chemistry
What Is the Evidence of a Chemical Reaction?Chemistry
How a Centrifuge Works to Separate Materials Physics
Why Is Ocean Water Considered a Solution?Chemistry
What Type of Mixture Is Blood? Solution, Suspension, Colloid Chemistry
Why Does Ice Float on Liquid Water?Physics
Is the Creation of Slime a Chemical Reaction?Chemistry
Is Water Freezing Endothermic or Exothermic?Chemistry
Freezing Water: The Molecular Process and Its Effects Chemistry
Salty Ice: How It Forms and Why It’s Useful Chemistry
What Is a Supercooled Liquid? Science and Examples Physics