investiagtion 5.1 combined[1]
TRANSCRIPT
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How does your body get energy to do what you want to do?
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What kind of energy do we get
from these resources? How?
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Burning releases energyBurning releases energy
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Do these
contain
energy?
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Whoa!
That’s a lot of energy!
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•Well, is there energy in the snack?
•How do you know? What evidence do you have?
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How can we
measure how much
heat energy is released by one
Cheeto?
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Form an aluminum cup by CAREFULLY
molding the aluminum-foil
square around the vial
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Squeeze the ring and
insert the ends into the binder clip.
Slide the ring over the dowel.
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Open the clip and clamp it on the dowel about 10 cm above the
base
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Put the “cup” in the holder and place the bottom of the
cup about 1.5-2 cm
above the Cheeto
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Pour 20 mL of water into your “cup” and record the starting temperature
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GOGGLEGOGGLE UPUP and let’s begin!
Record the temperature of the water
after the Cheeto stops
burning.
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N o g o g gl e s ,
N o g l o w!
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• What evidence do we have that food has energy?
• Why do people eat food?
• Is water food?• Where do people get
energy besides food?• What units do people
use to measure the energy in food?
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Calories• Unit used to measure
heat• One calorie is the
amount of heat needed to raise the temperature of 1 mL of water 1 º C
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How many calories of
heat did your burning Cheeto
transfer to your water?
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Calorie Calculations
• To determine calories, multiply the change in temperature (T) by the volume of water (V) used
T x V = caloriesT = 58ºC - 12 ºC = 46 ºC • Calories = 46 ºC x 20 mL = 920 calories
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Reflection page 40
Is water food?Creatively convince
your audience of your answer.