Heat Transfer: Convection in Action

Heat Transfer: Convection in Action

Year 3 Science Understanding How Heat Moves Through Fluids

What Do You Already Know?

Have you ever felt warm air rising from a heater? What happens when you blow on hot soup? Why does steam rise from your hot bath?

What is Convection?

Heat moving through liquids and gases Warm fluids rise up Cool fluids sink down Creates a circular pattern called convection currents

Examples of Convection

{"left":"Hot air balloons rise because warm air is lighter\nSteam rises from hot drinks\nWarm air rises from heaters and fireplaces","right":"Ocean currents move warm and cold water\nWind is caused by warm and cool air moving\nLava lamps show convection in action"}

Let's Observe Convection!

We'll use warm water and food coloring Watch how the colored warm water moves Observe the patterns it makes Draw what you see in your science journal

How Convection Works

Think and Discuss

Why does hot air rise? What would happen if we heated water at the top instead of the bottom? Can you think of other places where you see convection?

What We Learned Today

Convection is heat moving through liquids and gases Warm fluids rise because they are lighter Cool fluids sink because they are heavier This creates circular patterns called convection currents We can see convection in many everyday situations