Physics

Mass and Volume Mass is the amount of matter in an object, measured in grams (g) or kilograms (kg) Volume is the amount of space an object occupies, measured in…

Hot and Cold Hot soup feels hot on your tongue, ice cream feels cold in your hand, a warm bath feels comfortable. But why do things feel hot or cold? It's all…

What Is Thermal Energy? Thermal energy is the energy a substance possesses because of the motion of its particles – the faster these particles move, the higher…

What is Evaporation? Evaporation is the process by which a liquid turns into a gas at the surface at any temperature below its boiling point – unlike boiling,…

What Does "Conserved" Mean? In everyday language, "conserve energy" usually means use less energy (turn off lights, unplug devices, walk instead of driving).…

Introduction to Interference Interference is what happens when two or more waves meet and combine together – their amplitudes add up to create a new wave…

What is Sound? Sound is a form of energy produced by vibrating objects that travels as waves through a medium (solid, liquid, or gas) – everything that makes…

What Are Circuit Symbols? Circuit symbols are simple, standardized drawings that represent electrical components. They make circuit diagrams quick to draw and…

What is a Series Circuit? A series circuit is a circuit where components are connected in a single loop or path – there is only one route for the current to…

What is a Parallel Circuit? A parallel circuit is a circuit where components are connected in separate branches – there are multiple paths for electric current…

What is Resistance? Resistance is the opposition to the flow of electric current in a circuit, measured in ohms (Ω) Think of resistance like obstacles in a pipe…