Thermal Energy/Energy Transfer
What is Matter?
Anything that has mass and takes up space.
What is the phase change when temperature decreases from gas to liquid?
Condensation
Heat is being released.
Exothermic
Heat is being absorbed.
Endothermic
What is Heat Transfer?
Thermal Energy exchanges between objects of different temperatures
Which has more thermal energy? A cup of hot tea or a snow man?
A snowman.
Surroundings are cold.
Endothermic
Surroundings are hot.
Exothermic.
Thermal energy always moves from objects with _______ temperatures to objects with ________ temperatures.
Higher
Lower
What are the 3 types of heat transfer?
Conduction, Convection, Radiation
Reaction/system is warm.
Endothermic.
Reaction/system is cold.
Exothermic.
Matter can exist in 3 states. What are the states?
Solid, liquid, gas
Define Temperature.
The average kinetic energy of all the particles in a material.
The transfer of thermal energy that occurs in solids, liquids, and gases when 2 substances of different temperatures touch.
Conduction.
Can only happen in liquid and gases. Heat transfer that is caused by the rising of hotter, less dense fluids and the falling of cooler denser fluids.
Convection
Define Thermal Energy.
The total kinetic and potential energy of tiny particles that make up matter.
or
a measure of the total energy of the motion of an object's particles.
If two objects have different temperatures, in which direction will heat move? For how long?
From warm to cold until both temperatures have leveled out.
The transfer of energy by the movement of electromagnetic waves.
Radiation.
What happens when energy is transferred from one system to another?
It may change form.