Zoe2PhysicsQuiz Flashcards
(27 cards)
What is thermal energy?
Thermal energy is the total kinetic energy of the particles in a substance.
True or False: Heat and thermal energy are the same thing.
False
Fill in the blank: The __________ model explains the behavior of matter in terms of particles.
particle
What are the three main ways heat can transfer?
Conduction, convection, and radiation.
Which method of heat transfer occurs through direct contact?
Conduction
True or False: Convection occurs in solids.
False
What is the primary mechanism of heat transfer in fluids?
Convection
Define conduction.
Conduction is the transfer of heat through a material without the movement of the material itself.
What type of heat transfer involves electromagnetic waves?
Radiation
Fill in the blank: In a vacuum, heat can only be transferred by __________.
radiation
What happens to particles in a substance as thermal energy increases?
The particles move faster and spread apart.
True or False: All materials conduct heat equally well.
False
Which type of material is a good conductor of heat?
Metals
What is the term for the measure of a material’s ability to conduct heat?
Thermal conductivity
Fill in the blank: The __________ of a substance is a measure of its thermal energy per unit mass.
specific heat capacity
What is the primary driver of convection currents?
Differences in temperature and density.
True or False: Insulators are materials that prevent heat transfer.
True
What is an example of a good insulator?
Styrofoam
Define radiation in the context of heat transfer.
Radiation is the transfer of heat energy through electromagnetic waves.
What role does the particle model of matter play in understanding thermal energy?
It explains how particles behave and interact with thermal energy.
What is thermal equilibrium?
It is the state in which two objects in contact reach the same temperature and no heat flows between them.
Fill in the blank: The __________ effect describes how heat moves from a warmer object to a cooler one.
second law of thermodynamics
Which process describes the transfer of heat through currents in a fluid?
Convection
True or False: Heat always flows from cooler to warmer objects.
False
