Bell workBell work

What two forms of energy do all What two forms of energy do all others fall under?others fall under?

QuestionQuestion

Think about all the “stuff” you use in Think about all the “stuff” you use in a day that runs on energy.a day that runs on energy.

What kinds of energy are there What kinds of energy are there besides Kinetic and potential?besides Kinetic and potential?

Other types of Other types of energy!energy!

These forms of energy These forms of energy include thermal, chemical, include thermal, chemical, electrical, sound, light, and electrical, sound, light, and

nuclear energy. nuclear energy.

ObjectivesObjectives

Explain the relationship between energy and work.

Compare kinetic energy and potential energy.

Describe the different forms of energy.

Thermal energy-kineticThermal energy-kinetic

All matter is made of particles that All matter is made of particles that are always in random motion. are always in random motion.

They have kinetic energy. They have kinetic energy. Thermal energyThermal energy is all of the kinetic is all of the kinetic

energy due to random motion of the energy due to random motion of the particles that make up an object.particles that make up an object.

Thermal energyThermal energy

Particles move faster at higher Particles move faster at higher temperatures than at lower temperatures than at lower temperatures.temperatures.

The faster the particles move, the The faster the particles move, the greater their kinetic energy and the greater their kinetic energy and the greater the object's thermal energy. greater the object's thermal energy.

Thermal energy also depends on the Thermal energy also depends on the number of particles. number of particles.

Chemical energy-Chemical energy-potentialpotential

ChemicalChemical energyenergy is the energy of a is the energy of a compound that changes as its atoms are compound that changes as its atoms are rearranged. rearranged.

Chemical energy is a form of potential Chemical energy is a form of potential energy because it depends on the position energy because it depends on the position and arrangement of the atoms in a and arrangement of the atoms in a compound. compound.

When compounds such as sugar form, work When compounds such as sugar form, work is done to join the different atoms together. is done to join the different atoms together.

When they are broken apart the energy is When they are broken apart the energy is released.released.

QuestionQuestion

So what “things” have chemical So what “things” have chemical energy?energy?

ObjectivesObjectives

Explain the relationship between energy and work.

Compare kinetic energy and potential energy.

Describe the different forms of energy.

Electrical-kinetic and Electrical-kinetic and potentialpotential

Electrical energyElectrical energy is the energy of is the energy of moving electrons. moving electrons. Electrons are the negatively charged Electrons are the negatively charged

particles of atoms. particles of atoms. The electrical energy of moving The electrical energy of moving

electrons is used to do work. electrons is used to do work.

ElectricityElectricity

The electrical energy used in your home The electrical energy used in your home comes from power plants. comes from power plants.

Huge generators turn magnets inside loops Huge generators turn magnets inside loops of wire. of wire.

The changing position of a magnet makes The changing position of a magnet makes electrical energy run through the wire. electrical energy run through the wire.

This electrical energy can be thought of This electrical energy can be thought of

as potential energy that is used when as potential energy that is used when

you plug in an electrical appliance and you plug in an electrical appliance and

use it.use it.

ObjectivesObjectives

Explain the relationship between energy and work.

Compare kinetic energy and potential energy.

Describe the different forms of energy.

Sound-KineticSound-Kinetic

Sound energy is caused by an object's Sound energy is caused by an object's vibrations. vibrations.

When an object makes noise it When an object makes noise it vibrates.vibrates.

The air particles also vibrate, and The air particles also vibrate, and transmit this energy to your ear. transmit this energy to your ear.

Sound energy needs a medium/matter Sound energy needs a medium/matter to travel through – solid, liquid or gasto travel through – solid, liquid or gas

Light-kineticLight-kinetic

Light energyLight energy is produced is produced by the vibrations of by the vibrations of electrically charged electrically charged particles. particles.

Like sound vibrations, Like sound vibrations, light vibrations cause light vibrations cause energy to be transmitted. energy to be transmitted.

But the vibrations that But the vibrations that transmit light energy transmit light energy don't need to be carried don't need to be carried through matter. through matter.

QuestionQuestion

So what are some things you use So what are some things you use daily that use the forms of energy daily that use the forms of energy we have talked about so far?we have talked about so far?

Do they have more than one?Do they have more than one? If so how many and what kinds?If so how many and what kinds?

Nuclear-potentialNuclear-potential

NuclearNuclear energyenergy, the energy that comes , the energy that comes from changes in the nucleus of an atom. from changes in the nucleus of an atom. It is used to generate electrical energy, and it It is used to generate electrical energy, and it

gives the sun its energy. gives the sun its energy. Atoms store a lot of potential energy Atoms store a lot of potential energy

because of the positions of the particles in because of the positions of the particles in the nucleus of the atoms. the nucleus of the atoms.

When two or more small nuclei join When two or more small nuclei join together, or when the nucleus of a large together, or when the nucleus of a large atom splits apart, energy is given off.atom splits apart, energy is given off.

NuclearNuclear

The energy given off by the sun comes The energy given off by the sun comes from nuclear energy. from nuclear energy.

Hydrogen nuclei join together to make a Hydrogen nuclei join together to make a larger helium nucleus. larger helium nucleus. This reaction, known as This reaction, known as fusion,fusion, gives off a gives off a

huge amount of energy. huge amount of energy. The sun's light and heat come from these The sun's light and heat come from these

reactions.reactions.

Brain pop!Brain pop!