Understanding Thermodynamics Through Everyday Examples

What principle explains why hot things don't stay hot?

• Magnetism

• Heat transfer

• Gravity

• Photosynthesis

What is the main function of a thermos?

• To heat up contents

• To cool down contents

• To minimize heat transfer

• To mix contents

What is kinetic energy?

• Energy of heat

• Energy of motion

• Energy of light

• Energy of position

How does conduction occur?

• Through sound

• Through direct contact

• Through a vacuum

• Through light

What does the movement of molecules in hot substances cause?

• Freezing

• Heat transfer

• Evaporation

• Condensation

What type of heat transfer can occur in a vacuum?

• Conduction

• Convection

• Radiation

• None of the above

Why are the insides of thermoses often shiny?

• To prevent corrosion

• To absorb heat

• To reflect radiation

• For aesthetic reasons

What is the purpose of the vacuum in a thermos?

• To store extra liquid

• To keep the contents under pressure

• To minimize heat transfer through conduction

• To make the thermos lighter

What causes convection currents?

• Magnetic fields

• Uneven heating

• Radiation

• Direct contact

In what states of matter does convection occur?

• Solids and liquids

• Liquids and gases

• Solids and gases

• Gases and plasmas