Intro to . . . Energy

Energy is the ability to cause change.

law of conservation of energy Terms to Know potential energy kinetic energy transformations law of conservation of energy temperature thermal energy heat radiation conduction convection chemical energy

Transformations A change of energy from one form to another. For example . . .

Exploding fireworks are a transformation of chemical energy into thermal and light energy.

Kinetic Energy Energy of movement Depends on mass and speed Potential Energy Energy of position Depends on where it is in relation to gravity, magnetism, or some other force vs.

LAW OF CONSERVATION OF ENERGY Energy is neither created nor destroyed; it only changes form

Total Kinetic Energy of the particles in a material Thermal Energy Total Kinetic Energy of the particles in a material

TEMPERATURE HEAT Transfer Measure of of Thermal Kinetic energy energy VS. Transfer of Thermal energy Measure of Kinetic energy

How Thermal Energy Moves . . . Radiation Conduction Convection

Chemical Energy Endothermic Exothermic

Energy changing from one form to another is called a A: translocation B: transformation C: transportation D: transfer

A: only available when a force acts on an object. Energy is A: only available when a force acts on an object. B: only found in moving objects. C: the ability of an object to stay at rest. D: the ability to cause change.

Which of the following is an example of an energy transformation? A: light is reflected in a mirror B: a rock sits on the ground C: electricity travels through a light bulb which lights the room D: all of the above

Energy is used in homes to A: cook vegetables in a microwave B: light rooms C: play music from the stereo D: all of the above

A wagon sitting still at the top of a hill has A: neither potential or kinetic energy B: only potential energy C: only kinetic energy D: both potential and kinetic energy

The Law of Conservation of Energy states that A: all vehicles must meet special standards to save gas. B: energy is neither created nor destroyed, it only changes form. C: ecosystems always lose energy as they develop. D: the food chain retains energy from one level to another.

Which is true of kinetic energy? A: it depends on mass and speed B: it is energy of position C: it depends on where an object is in relation to an energy source D: exists in motionless objects

The total kinetic energy of the particles in a material is called A: thermal energy B: kinetic energy C: potential energy D: chemical energy

A: the total amount of chemical energy of a substance Temperature is A: the total amount of chemical energy of a substance B: the measure of heat C: the measure of kinetic energy in a substance D: the measure of resistance to heat

A: transfer of thermal energy B: measure of temperature What is heat? A: transfer of thermal energy B: measure of temperature C: measure of kinetic energy D: transfer of potential energy

Thermal energy flows from a system of high temperature to a system of low temperature. A: True B: False

Which of the following is NOT a way that energy moves: A: conduction B: convection C: radiation D: mediation

Energy that is stored within bonds of molecules is A: kinetic B: chemical C: radiant D: light

Radiation involves the transfer of energy by A: particle collisions B: waves C: airflow D: temperature change

The type of energy motion that may occur in a vacuum (without matter present) is A: radiation B: conduction C: convection D: all of the above

The explosion of TNT involves breaking of chemical bonds that release thermal energy. This type of chemical reaction is called A: an endothermic reaction B: an exothermic reaction C: an replacement reaction D: a synthesis reaction

A: loses kinetic energy and gains potential energy As a snowflake falls, it A: loses kinetic energy and gains potential energy B: loses potential energy and gains kinetic energy C: gains potential and kinetic energy D: loses potential and kinetic energy

What does a thermometer measure? A: heat B: total energy C: average kinetic energy D: chemical energy

A: solar to kinetic energy B: thermal energy to electrical energy Solar panels are used to heat the water of a swimming pool. This represents a transformation of A: solar to kinetic energy B: thermal energy to electrical energy C: electrical energy to solar energy D: solar energy to potential energy

Energy conversions are never 100% efficient Energy conversions are never 100% efficient. Whenever energy is transferred some becomes heat energy that is no longer available to do work. A: True B: False