Unit 3 Vocabulary Quizs (McGrawHill 6th Grade)

thermal equilibrium

• When the temperatures of materials that are in contact are the same.

• When two materials are at different temperatures and heat flows from one to the other.

• When materials are in a vacuum and do not exchange heat.

• When the temperature of a single material remains constant over time.

source object

• The object that provides energy for energy transfer.

• An object that absorbs energy from its surroundings.

• A stationary object that does not transfer energy.

• An object that reflects energy without absorbing it.

heat

• The transfer of thermal energy from a region of higher temperature to a region of lower temperature.

• The process of increasing the temperature of an object without changing its state.

• The ability of an object to do work or produce change.

• The measure of the average kinetic energy of the particles in a substance.

diffusion

• The movement of substances from an area of higher concentration to an area of lower concentration.

• The process of substances moving from low concentration to high concentration.

• The mixing of two substances to form a solution.

• The separation of substances based on their size.

closed system

• A system that does not exchange matter or energy with the environment.

• A system that allows free exchange of matter and energy with the environment.

• A system that only exchanges energy but not matter with the environment.

• A system that is completely isolated from all external influences.

random motion

• Movement in all directions and at different speeds.

• Movement in a straight line at a constant speed.

• Movement in a circular path only.

• Movement that is predictable and uniform.

thermodynamics

• The study of heat.

• The study of motion.

• The study of electricity.

• The study of light.

kinetic energy

• Energy due to motion.

• Energy stored in an object at rest.

• Energy transferred through heat.

• Energy associated with the position of an object.

potential energy

• Stored energy due to the interactions between objects or particles.

• Energy that is in motion and can do work.

• Energy that is released during a chemical reaction.

• Energy that is stored in the form of heat.

radiation

• The transfer of thermal energy from one material to another by electromagnetic waves.

• The process of converting light into chemical energy.

• The emission of particles from a radioactive source.

• The movement of heat through direct contact between materials.