friday, april 10, 2015 do now: jordan wants to design an experiment after hearing a commercial for...
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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.
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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
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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
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Double Trouble
Energy and Waves
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Double Trouble
Types of Energy
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Double Trouble
Waves
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Double Trouble
Electromagnetic Spectrum & Light
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Double Trouble
Energy Transformations
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Types of Energy Waves Electro. Spectrum & Light
Energy Transformations
Main Board
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Stored energy within an object; form when object
is at rest
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Potential energy
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Energy present when an athlete throws a football
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Mechanical energy
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Energy present when a person eats food; also found within a battary
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Chemical energy
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The sun
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Nuclear energy
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Double or Nothing
Choose whether or not you would like a follow up question and risk all what you just won.
400
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Double or Nothing
Name three sources of renewable energy
Sun, wind, water, geothermal, biomass
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T/F: nonrenewable energy is ideal because it
is cheap and doesn’t harm the environment
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false
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Two main types of waves defined by their motion
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Transverse and longitudinal
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The distance between two crests
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wavelength
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as the wavelength gets shorter, what happens to the frequency of a wave?
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the frequency increases
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As the amplitude of a wave increases, what is
true about a wave’s energy?
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the energy increases
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Lightning Question
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As the frequency of a sound wave
increases, explain the change(s) that
occurs to the sound
The pitch increases
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As the frequency increases on an electromagnetic wave,
what happens to the radiation (energy) level of the wave?
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The radiation (energy) level increases
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What wave behavior is depicted below?
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diffraction
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John is wearing a black shirt and Susan is wearing
a white shirt. Why will John be hotter in the sun?
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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.
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If Mrs. John sees a color with a wavelength of 400
nm, then she is most likely looking at the color:
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Violet(ROYGBIV!!!)
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What light behavior, also true of sound waves, is
depicted below?
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reflection
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Double or Nothing
Choose whether or not you would like a follow up question and risk all what you just won.
500
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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
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From the apple to the biker and from the gas to the car, what energy transformation
is taking place?
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Chemical energy motion (kinetic) energy
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What is the renewable source of energy for this
system?
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Wind energy
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Lightning Question
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At what point in a hydroelectric power plant is energy transformed
into electricity?
The generator transforms the energy into electricity
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As the skater goes down the ramp, what can we expect his
Kinetic and Potential energy to do?
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Kinetic energy will increase and potential energy will decrease
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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.
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Double Trouble
ROUND 2
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Double Trouble
Waves
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Double Trouble
Technology
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Double Trouble
Energy Transformations
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Double Trouble
Heat Transfer
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Waves TechnologyEnergy
Transformations Energy and Me
Round 2
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What makes the wave below transverse?
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The wave is transverse because the motion of the energy is perpendicular to the motion of the matter
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How are mechanical waves and
electromagnetic waves different?
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Mechanical wave – requires a medium to move energy
Electromagnetic wave – can move energy through a
medium but does not require it
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Lightning Question
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Draw 2 diagrams of 2 sound waves with the same pitch but different volumes.
See Mrs. John
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Fill in the blanks with examples:
Mechanical Electromagnetic
Transverse ? ?
Longitudinal Sound Waves N/A
Combination Ocean Waves N/A
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Mechanical Electromagnetic
Transverse Flag waving Light waves
Longitudinal Sound Waves N/A
Combination Ocean Waves N/A
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What light behavior is depicted below?
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refraction
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Explain how SONAR works.
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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.
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Explain how ultrasound technology works.
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What type of electromagnetic wave is used in a remote
control?
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infrared
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What does an amplifier do?
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An amplifier increases the power of a wave increases
the amplitude increases the volume capability
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Double or Nothing
Choose whether or not you would like a follow up question and risk all what you just won.
400
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Double or Nothing
How do telescopes work?
Most collect and focus electromagnetic waves
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How is a visible light telescope different than
a radio telescope?
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Visible light telescopes gather light and radio
telescopes gather radio waves
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Where does the roller coaster have the greatest
potential energy?
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At the highest point on the track (the very
beginning).
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At what point in the Rube Goldberg contraption is chemical energy transformed into heat energy
(thermal)?
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Why does the total energy never change?
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The total energy never changes because of the Law of Conservation of Energy, which
states energy can not be created or destroyed.
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Lightning Question
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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
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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?
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The EPE increases and the rubber band will fly further across the room because it
now has more kinetic energy capability.
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The metal rod gets hot because of:
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conduction
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A marshmallow held above a campfire cooks
through this form of heat transfer:
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radiation
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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?
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The mug’s temperature will decrease and the table temperature will increase
because of conduction.
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Earth’s global temperatures are moderated and
maintained by which form of heat transfer?
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Convection (ocean and wind currents)
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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?
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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)
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Double or Nothing
Choose whether or not you would like a follow up question and risk all what you just won.
500
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Double or Nothing
What method of heat transfer is evident in the before
mentioned lab?
convection
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Double Down
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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
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How high or low (not loud) a
sound is
Reveal Questions
The amount of energy a wave
carries depends on its…
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Why do objects appear as
different colors?
Reveal Questions
The ability to make change
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What is sound? Longitudinal waves are also
called _________.
Reveal Questions
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What two factors is Kinetic Energy dependent on?
What two factors is Potential
Energy dependent on?
Reveal Questions
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End