Study Guide Flashcards
what is the definition of energy?
The capacity to do work.
What is kinetic energy (KE)? How is this related to thermal energy
Energy of motion. Thermal energy is the toal kinetic energy of a substance particles
What is the law of conservation of Energy?
The law that states energy cannot be created or destroyed but can be changed from one form to another.
What does the kinetic theory of matter say about all substances and their particles?
Everything is constantly in motion.
What is the difference between tempature and thermal energy (heat) ?
Temperature is the AVERAGE of the kinetic energy.
Thermal Energy is the Total motion of a substance.
What is the definition of heat?
The energy transferred between objects that are at different temperatures.
What is thermal energy?
A form of energy caused by internal motion of particles in a substance.
How does a thermometer work (why does the liquid inside seem to rise and fall with different temperatures)?
The alcohol expands as the temperatures rise forcing it up the tube.
How is water different than other substances when it comes to the rule of thermal expansion? How is this difference helpful for aquatic life?
The water expands instead of contracting at 4 °c. This helps because the fish at the bottom won’t get frozen, the water will freeze at the top.
What are the three temp scales, and what was each one based on?
gabriel FAHRENHEIT
anders CELCIUS
lord KELVIN
Does energy flow from high temp. to low or low temp. to high?
High to low
What is thermal equillibrium?
When two different things of two different temperatures reach the same point of temperature.
What is conduction? Name something that is a good conductor of heat energy.
When thermal energy is transferred when two things touch. Copper
What is convection? Give an example of convection.
Thermal energy transfer in a fluid. Warm air rises, cold air sinks.
Explain the motion of cold and war air in a convection current.
When hot air rises and cold air moves down.
