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What is energy?
It is the ability to cause changes in matter.
Energy is involved when matter moves or changes its shape.
Energy can change from one form to another.
Energy can be transferred from one object to another.
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What causes ice cream to melt?
Heat Energy
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What is potential energy?
Energy that an object has because of its position or its condition.
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What is kinetic energy?
The energy an object has because of motion.
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When does a roller coaster car have the most kinetic energy?
When it is going down the hill.
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What is sound energy?
It is a form of energy that is carried as waves in vibrating matter.
It is a type of kinetic energy because particles of matter are moving.
It is the cause of all the sounds you hear.
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What is thermal energy?
It is the total kinetic energy of the particles that make up a substance.
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What is light energy?
It is a form of energy that can travel through space.
Light can also travel through some types of matter, such as air or glass.
Light energy travels as waves.
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What happens in a flashlight?
Electrical energy changes to light energy in a flashlight.
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What is electrical energy?
It is energy caused by the movement of electric charges.
Electrical energy can change to other types of energy you can use.
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What happens to electrical energy in a toaster or stove?
It changes to thermal energy.
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What happens to electrical energy in lamps and spotlights?
It changes to light energy.
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Does your skin sense light energy?
Your skin senses heat, but it cannot sense light energy.
Your eyes sense light energy.
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What is mechanical energy?
It is the total energy of motion and position of an object.
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What is the relationship among mechanical energy, kinetic energy and potential energy?
Mechanical Energy = Kinetic Energy + Potential Energy
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What is chemical energy?
It is energy that is stored in matter and that can be released by a chemical reaction.
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What does your body do when it needs energy?
When your body needs energy, it breaks down food and releases potential chemical energy from it.
If you use that energy, it changes into kinetic energy.
It also uses stored chemical energy in food to produce thermal energy.
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When you wind a key in a toy, what happens?
Winding the key on the toy increases the toy's mechanical energy.
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What energy does our bodies use to move and stay warm?
Our bodies use the chemical energy in food to move and stay warm.
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How do the hands on a watch move?
The hands on the watch move because the watch has mechanical energy.
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Energy is the ability to cause motion or create what?
matter or change
Change
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There are two main categories of energy. They are what?
Potential energy and kinetic energy.
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Energy can't be created or what?
destroyed.
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When energy can change from one form to another, it called what energy?
energy transformation
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What energy is the total kinetic energy of the particles in matter?
Thermal energy
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What energy can be released by a chemical reaction?
Chemical energy
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What energy can be seen?
Light energy
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What energy travels as waves through vibrating matter.
Sound energy
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What energy is caused by movement or electrical charges?
Electrical energy
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What energy is the combination of the potential and kinetic energy an object contains?
Mechanical energy
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Name the energy and what does it mean?
Sound Energy
- energy carried as waves of vibrating matter
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Name the energy and what does it mean?
Light Energy
- energy that travels as a wave and that you are able to see
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Name the energy and what does it mean?
Chemical Energy
- energy that is stored in matter and can be released during a chemical reaction
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Name the energy and what does it mean?
Electrical Energy
- energy caused by motion of electric charges
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Name the energy and what does it mean?
Thermal Energy
- the total kinetic energy of particles in matter
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Name the energy and what does it mean?
Mechanical Energy
- sum of an object's potential and kinetic energy
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Which is potential energy and which in kinetic energy?
The unlit match is potential energy.
The lit match is kinetic energy.
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Which is potential energy and which in kinetic energy?
The squeezed spring is potential energy.
The sprung spring is kinetic energy.
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- A. Thermal Energy
- B. Chemical Energy
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What energy is in this picture?
Potential energy are at great amounts in this picture.
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What energy is in this picture?
Kinetic energy and potential energy because she is steady but yet is still moving.
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What is thermal energy?
It is total kinetic and potential energy in a substance.
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What is heat?
It is thermal energy that moves from one substance to another.
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What is conduction?
It is heat transfer between two objects that touch.
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What is convection?
It is the transfer of thermal energy by movement of a liquid or gas.
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What is radiation?
The transfer of energy in the form of waves.
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What is an insulator?
It is a material that does not easily transfer heat or electricity.
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What is a conductor?
A material that easily transfers electricity or heat.
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How does heat move?
Heat always moves from a warmer substance to a cooler substance by conduction, convection, or radiation.
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What happens during conduction?
During conduction, the particles in substances do not move.
Energy is passed from particle to particle as they vibrate and bump against one another.
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What happens to water in a pot?
The warm water in the pot is less dense than the cool water above it.
The warm water rises and the cool water falls.
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What happens to the Sun when it hits the Earth?
When the Sun's energy hits Earth, some of the energy is absorbed and warms Earth's surface.
Some of the energy is bounced back toward space.
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What does air do for your bodies?
Air is a good insulator and keeps heat close to your body.
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What is refraction?
The bending of light as it passes from one material to another.
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What is reflection?
The bouncing of light rays off the surface of a material.
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What type of wave is sound?
Sound is a type of compressional wave.
It is caused by vibration.
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How does light travel?
Light travels as a traverse wave.
It can travel through matter and through empty space.
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How are the light waves organized?
The types of waves are organized from the shortest wavelength to the longest.
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How does light react when it hits matter?
Light can act in different ways when it strikes matter.
Dark-colored materials absorb more light than light-colored materials.
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At what speed does light travel?
Light travels at different speeds through different materials.
It travels fastest through gases and slowest through solids.
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