Friday, April 10, 2015• Do Now: Jordan wants to design an
experiment after hearing a commercial for the “Best flower fertilizer this side of the Mississippi! Watch the flowers grow taller by the day!” He decides to test the commercial's ad against three other fertilizers. Identify the QUESTION, VARIABLES, and TYPE OF GRAPH for Jordan’s experiment.
Lab Design• Question: Which type of fertilizer will
make the flower grow tallest?• Variables:– IV: Type of fertilizer (FOUR test groups,
ONE control without fertilizer)– DV: The height of the flowers– Control: Type of flower, soil, water, light,
days observed
• Graph: line graph
Yesterday’s Lab:• QUESTION: What shape fin will enable a
rocket to fly to the highest altitude?• VARIABLES:– IV: shape of fin (three different fins, one with
no fins)– DV: altitude of flight– Controls: rocket other than fins, weather,
wind, temperature, launcher (water pressure)
• GRAPH: bar graph
Double Trouble
Energy and Waves
Double Trouble
Types of Energy
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Waves
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Electromagnetic Spectrum & Light
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Energy Transformations
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Types of Energy Waves Electro. Spectrum & Light
Energy Transformations
Main Board
Stored energy within an object; form when object
is at rest
Potential energy
Energy present when an athlete throws a football
Mechanical energy
Energy present when a person eats food; also found within a battary
Chemical energy
The sun
Nuclear energy
Double or Nothing
Choose whether or not you would like a follow up question and risk all what you just won.
400
Double or Nothing
Name three sources of renewable energy
Sun, wind, water, geothermal, biomass
T/F: nonrenewable energy is ideal because it
is cheap and doesn’t harm the environment
false
Two main types of waves defined by their motion
Transverse and longitudinal
The distance between two crests
wavelength
as the wavelength gets shorter, what happens to the frequency of a wave?
the frequency increases
As the amplitude of a wave increases, what is
true about a wave’s energy?
the energy increases
Lightning Question
As the frequency of a sound wave
increases, explain the change(s) that
occurs to the sound
The pitch increases
As the frequency increases on an electromagnetic wave,
what happens to the radiation (energy) level of the wave?
The radiation (energy) level increases
What wave behavior is depicted below?
diffraction
John is wearing a black shirt and Susan is wearing
a white shirt. Why will John be hotter in the sun?
John’s dark shirt is opaque. Opaque matter can either absorb
light or it can reflect light. Because John’s shirt is black, it will absorb
all the wavelengths of color in white light, trapping the heat
inside. Susan’s shirt will reflect all colors.
If Mrs. John sees a color with a wavelength of 400
nm, then she is most likely looking at the color:
Violet(ROYGBIV!!!)
What light behavior, also true of sound waves, is
depicted below?
reflection
Double or Nothing
Choose whether or not you would like a follow up question and risk all what you just won.
500
Double or Nothing
Explain the behavior of light as it passes through a prism.
As white light passes through a prism, the wavelengths are bent by refraction because they slow down as they enter new medium. The colors
separate because each has a different wavelength
From the apple to the biker and from the gas to the car, what energy transformation
is taking place?
Chemical energy motion (kinetic) energy
What is the renewable source of energy for this
system?
Wind energy
Lightning Question
At what point in a hydroelectric power plant is energy transformed
into electricity?
The generator transforms the energy into electricity
As the skater goes down the ramp, what can we expect his
Kinetic and Potential energy to do?
Kinetic energy will increase and potential energy will decrease
If the skater has motion on a ramp, describe his location at
points I, II, III and IV *There could be multiple answers for III and IV.
Double Trouble
ROUND 2
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Waves
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Technology
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Energy Transformations
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Heat Transfer
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Waves TechnologyEnergy
Transformations Energy and Me
Round 2
What makes the wave below transverse?
The wave is transverse because the motion of the energy is perpendicular to the motion of the matter
How are mechanical waves and
electromagnetic waves different?
Mechanical wave – requires a medium to move energy
Electromagnetic wave – can move energy through a
medium but does not require it
Lightning Question
Draw 2 diagrams of 2 sound waves with the same pitch but different volumes.
See Mrs. John
Fill in the blanks with examples:
Mechanical Electromagnetic
Transverse ? ?
Longitudinal Sound Waves N/A
Combination Ocean Waves N/A
Mechanical Electromagnetic
Transverse Flag waving Light waves
Longitudinal Sound Waves N/A
Combination Ocean Waves N/A
What light behavior is depicted below?
refraction
Explain how SONAR works.
Sound waves are sent to the bottom of the ocean floor. They are then reflected and return to the SONAR on a ship. The time it takes for the wave to be sent and
return is divided by 2 and used to determine the distance between the ship
and an obstacle. This is then used to create a map.
Explain how ultrasound technology works.
What type of electromagnetic wave is used in a remote
control?
infrared
What does an amplifier do?
An amplifier increases the power of a wave increases
the amplitude increases the volume capability
Double or Nothing
Choose whether or not you would like a follow up question and risk all what you just won.
400
Double or Nothing
How do telescopes work?
Most collect and focus electromagnetic waves
How is a visible light telescope different than
a radio telescope?
Visible light telescopes gather light and radio
telescopes gather radio waves
Where does the roller coaster have the greatest
potential energy?
At the highest point on the track (the very
beginning).
At what point in the Rube Goldberg contraption is chemical energy transformed into heat energy
(thermal)?
Why does the total energy never change?
The total energy never changes because of the Law of Conservation of Energy, which
states energy can not be created or destroyed.
Lightning Question
When a boy tosses a ball up in the air, at what point does the
ball have the greatest kinetic energy?
Right after the boy lets go and right before the ball lands on the ground
As Mrs. John pulls back on a rubber band, ready to fire at the talking
student, what happens to the elastic potential energy of the rubber band, and what will happen when she lets
go?
The EPE increases and the rubber band will fly further across the room because it
now has more kinetic energy capability.
The metal rod gets hot because of:
conduction
A marshmallow held above a campfire cooks
through this form of heat transfer:
radiation
A hot coffee mug is left on a table for 10 minutes. What
will most likely happen to the cup and to the table during
that time period?
The mug’s temperature will decrease and the table temperature will increase
because of conduction.
Earth’s global temperatures are moderated and
maintained by which form of heat transfer?
Convection (ocean and wind currents)
In this convection lab, the red water is hotter than the blue
water. After about ten minutes, where can we expect to see the
hot water and the cold water within the tank?
The hot water (red) will be at the top of the tank and the
colder water (blue) will be at the bottom because the
currents move hotter, denser fluid up (rises)
Double or Nothing
Choose whether or not you would like a follow up question and risk all what you just won.
500
Double or Nothing
What method of heat transfer is evident in the before
mentioned lab?
convection
Double Down
If white light strikes an object and we see red reflected, what
color is the object?
A clear window that allows all light to pass through is an example of…
Reveal Questions
How high or low (not loud) a
sound is
Reveal Questions
The amount of energy a wave
carries depends on its…
Why do objects appear as
different colors?
Reveal Questions
The ability to make change
What is sound? Longitudinal waves are also
called _________.
Reveal Questions
What two factors is Kinetic Energy dependent on?
What two factors is Potential
Energy dependent on?
Reveal Questions
End