Transcript Energy Forms

What is Energy?
Grade 5
What is Energy?
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Energy is the ability to do work.
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Energy is the ability to cause a change.
Energy can change an object’s:
motion
shape
temperature color
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Potential Energy
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Stored energy that could cause change in
the future.
Potential energy often changes or
transfers into kinetic energy.
Types of potential energy: elasticity
gravitational
compressed spring
chemical
magnetic
atoms being brought together
Chemical Energy
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Chemical energy is made when substances
react and form new substances.
Food, batteries, and fuels such as oil
and gasoline are stored chemical
energy.
Chemical energy can change to:
sound
light
thermal
electrical
kinetic
Kinetic Energy
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Kinetic energy is energy due to motion.
The amount of kinetic energy depends on
the object’s speed and mass.
Kinetic energy can change into other
forms of energy.
Ball slows down
Ball speeds up
What is Sound?
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Sound is a form of energy produced by a
vibration or a back and forth movement of
an object.
Sound is a wave of vibrations that spread
from its source of its matter.
The more vibrations the waves have, the
more energy, the louder the sound.
The faster the vibrations or the frequency,
the higher the sound.
How high or low a sound is called the pitch.
In which state of matter, gas, liquid, or
solid does sound travel the best?
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Sound travels the fastest and is heard
the best through solids.
Sound travels the slowest and is the
quietest when traveling through gases.
Sound travels at different speeds in
different states of matter/materials.
Can sound travel in a vacuum? Explain.
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What is light?
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Light is something that allows us to see
objects.
Light is a form of energy.
Light is produced by the vibrations of
electrically charged particles.
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Properties of Light
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Light travels in a straight path.
Light doesn’t travel through all
objects.
These are defined as opaque.
Light can be absorbed and
changed to heat.
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Properties of Light Continued
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Light bounces off or is reflected from
some kinds of opaque objects.
Light travels in waves.
Angles of Reflection
Compare and Contrast
Cardboard VS
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Light doesn’t pass
through – opaque
dull
dark
absorbs light
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A Mirror
Light doesn’t pass
through – opaque
shiny
smooth
reflects light
Properties of Light
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Some objects let all light pass
through them are known as:
transparent
Some objects let some light pass
through them are known as:
translucent
Bending Light Lab
Write down responses on your note page.
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Problem: What does light do when it
travels from one medium or state of matter
(air) through another medium (water)?
Hypothesis:
Test and Observe: Follow steps from the
lab sheet.
Conclusion:
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Light Changes Direction
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Light bends or refracts as it passes
from one medium (form of matter:
solid, liquid or gas) to another.
Refraction of Light Virtual Tutorial
More on Bending Light
White light includes all the colors of
the rainbow - ROY G BIV.
How a Prism Works
Where Does Light Come From?
Sources of Light
Sun
Ceiling Lights
Light bulbs/lamps
Flashlight
Candle flame
Produced By
Nuclear reactions
Electricity
Electricity
Chemical reactions &
Electricity
Chemical energy
What is Thermal Energy?
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Thermal energy is the total of all the kinetic
and potential energy of the atoms in an object.
When any form of matter gets warmer, the
kinetic energy of its atoms increases.
The object’s particles move faster, so its thermal
energy increases.
A change in thermal energy can lead to a
change in phase or state of matter.
Temperature is a measure of thermal energy.
How Does Heat Move?
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Thermal energy flows from warmer
substances to cooler substances.
Heat is transferred from one object
to another in three different ways:
conduction
convection
radiation
What is electrical energy?
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A form of energy that is produced
when electrons move from one place
to another.
Electrons are particles that are in the
space around the nucleus of an atom.
The forces of attraction and repulsion
make electrons move.
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http://www.energyquest.ca.gov/story/chapter02.html
Energy cannot be made or destroyed
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Energy can move from one object to another.
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Energy can change from one form to another.
Forms of Energy
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Electrical
Light
Chemical
Sound
Heat/Thermal
Solar
Wind
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Water
Nuclear
Plant & Animal
bodies
Mechanical:
kinetic
potential
Forms of Energy
Energy Forms
 Heat/thermal
 Electrical
 Chemical
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Nuclear
Mechanical:
potential
kinetic
Light /Radiant
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What Happens?
Objects warm. Food cooks.
Lights on. / Machines run.
Organisms move and grow.
Flashlights light up.
Generates electricity.
Sled sits on top of a hill.
Sled slides down the hill.
Plants grow. / Lasers cut.
Basic Forms of Energy
Energy Forms
1.
2.
3.
4.
5.
Sound
Electrical
Heat/thermal
kinetic
Light
What Happens?
A. Objects warm. Food cooks.
B. Lights on. / Machines run.
C. Matter vibrates.
D. Plants grow. / Humans see
E. Sled slides down the hill.