TE
material that slows heat transfer
Insulation
heat transfer by direct contact
Conduction
heat transfer in liquids and gases by particle movement
Convection
heat transfer by electromagnetic waves (no contact needed)
Radiation
matter cannot enter or leave
Closed System
gas ➜ liquid when particles slow down and come together
Condensation
energy related to the motion of particles
Thermal Energy
Why does a solid not change shape like a liquid or gas?
Its particles cannot move freely
How do liquids differ from gases?
Liquid particles are closer together than gas particles
What does the mass of a closed system tell us about matter transfer?
Matter does not enter or leave, so the mass stays constant
What aspect would be considered when developing a thermal cup in developing possible solutions?
The type of insulating materials to use
What is kinetic energy a measure of in the context of particles in a liquid?
The energy of movement
How does the movement of particles change as a liquid cools down?
Particles move slower
Which of the following is a characteristic of a closed system?
It allows energy but not matter to enter
_____colors absorb more heat from surroundings than____colors
Dark, Light
How does the color of a container affect its ability to keep things hot or cold?
Dark colors absorb more heat from the surroundings
What is the main function of insulation in a container for hot or cold drinks?
To slow heat transfer
What is convection, and how does it affect a hot drink in an uninsulated container?
Movement of heat in liquids and gases; it cools the drink by circulating cooler air
What role does the tightness of a lid play in keeping beverages hot or cold in a container?
A tight lid helps to prevent heat transfer through the top of the container
What happens to particles in a liquid when it turns into a gas?
They move apart and move freely
Explain how an insulated cup maintains the temperature of beverages. Include the role of insulation and the design features that contribute to its effectiveness.
To be determined by teacher
Where do the water droplets outside a cold cup come from?
The air outside the cup
Atoms are made of the following:
Protons(+), neutrons(0), and electrons(-)
Why do hot liquids have particles that move faster than in cold liquids?
Hot liquids have higher kinetic energy
A good thermal cup has the following
slows heat transfer
limits air movement
may include a tight lid
uses insulating materials