Show:
Thermal Energy Facts
Thermal Energy Transfer
Its About the Word
Energy Conversions
Energy Forms
100
Thermal energy is dependent on ____________, ____________, and ______________.
What is temperature of the material, phase or state of the material, and mass of the material? DON'T forget that if a material has a lot more particles (mass) it will have more energy than if the material has a higher temperature. (the bucket and the cup from Eureka)
100
Occurs when objects are in direct contact.
What is conduction?
100
Measure of the average kinetic energy associated with randomly moving particles in the material
What is temperature?
100
This energy conversion takes place when logs are burned in a fireplace.
What is chemical energy to thermal & electromagnetic energy?
100
A toy robot can walk and talk because it runs on batteries. This form of energy is stored in the robot's batteries.
What is chemical energy?
200
Two objects are at the same temperature. The one that feels warm to the touch is an ___________________ and the one that feels cold to the touch is a _____________.
What is an insulator (feels warm because the thermal energy is not transferring to it as quickly) and conductor (feels cold because the thermal energy transfers to it quickly)?
200
Occurs using waves which travel through space?
What is radiation?
200
A general term used to represent the transfer of thermal energy from one object to another
What is heat?
200
This energy conversion occurs when a toaster is used (focus on the toaster not on what is being toasted).
What is electrical energy to thermal & electromagnetic energy (and mechanical if you include when the device pops back up)?
200
When a person hits a nail with a hammer driving it into a piece of wood, these forms of energy are present.
What is kinetic energy (specifically mechanical, thermal, and sound)?
300
The reason sidewalks and bridges have gaps and the liquid in a thermometer rises.
What is thermal expansion?
300
This method of transferring thermal energy occurs in fluids (both liquids and gasses) and occurs because the hot fluid rises and the cold fluid sinks causing a cycling motion within the fluid.
What is convection?
300
The variable scientist changes during an experiment.
What is the independent variable?
300
This type of energy conversion occurs when gasoline is used to power a car.
What is chemical energy to mechanical and thermal energy?
300
When lightning strikes electrical charge is transferred from the clouds to the ground. This form of energy is associated with the transfer of charged particles.
What is electrical energy?
400
Identify convection, conduction and radiation in a pot on a burner.
The pot in direct contact with the burner is conduction (also all areas of the pot including the handle will heat up through conduction) the light from the burner will produce thermal transfer through radiation. the water in the pot will rise as it gets hotter and convection currents will be set up so the bulk of the water will start moving this is convection.
400
Materials like glass, air, plastic and wood which do NOT allow for the easy or rapid transfer of thermal energy.
What are insulators?
400
Light is associated with this form of energy.
What is electromagnetic energy?
400
The energy conversion which must take place for you to ride a bike.
What is chemical energy to mechanical energy? If you want to be very technical chemical energy in your food must be converted to materials the body can use to send electrical impulses (electrical energy) to control your muscles which in turn allow you to ride the bike (mechanical energy).
400
A ball is sitting on top of shelf where a small child cannot reach it. This type of energy is associated with the ball sitting at rest on the shelf.
What is gravitational potential energy?
500
5 different materials all at the same initial temperature are set under a heat lamp for 5 minutes. The temperatures are read and recorded after 5 minutes. Identify Independent variable dependent variable 3 constants and indicate if the best thermal conductor will have a small temperature change or a large temperature change.
Independent variable: types of materials (clue: 5 different materials!) Dependent variable: temperature (clue: temperature read and recorded) constants: initial temperature, type of heating source (heat lamp), and the time they are exposed to the heat source (5 min) The best thermal conductor will have the largest temperature change
500
Thermal energy naturally or spontaneously from a material with high _______________ to a material with low _________________.
What is temperature (hot to cold)?
500
In the sun, hydrogen atoms combine to form helium atoms. This process releases light and thermal energy. This form of energy is related to changes in the nucleus of an atom.
What is nuclear energy?
500
The change in energy as a ball is thrown up and as the ball is falling down.
What is kinetic energy to potential energy (as the ball goes up) and potential energy to kinetic energy (as the ball goes down)?
500
Sheep are grazing on grass in a field. The chemical energy stored in the grass would fit under this type of energy.
What is chemical potential energy?