b!ow it out and hoId the smoking punk over the aluminum...
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Name 1nvest冒gating How Warm Air and Cooi Ai lntroduction How can a hang g!ider stay up in the ai「for hour bird soar over an open fie-d without fiapping its wing because of heat transfer and the motion of the ai「. As up in the air, g「aVfty puils it down・ This means that gl to find constant upwa「d forces to stay in the air" Do COme f「om? ln this lesson you w帖nvestigate how heat moves b and the air above it. How do s而ace temperature on th ai「 above it and the way air moves? Problem: State the prob!em we are investigatjng in t Hypothesis: Predict how the air wiII move when the Mate「ials 2 Convection Tubes 「 120 m」 plastic container of hot water 「 120 mL pIastic containe「 of c「ushed ice 「 piece of piastic tubing 「 sma旧unneI 「 punk stick 「 f看ashlight 「 sma看1 aluminum pan Proced u res 「。 Co=ect mate「ials 2。 Attach the fumei and tubing to the Convection Tub 3。 When you are ready, aSk Mr Brennan to light your b!ow it out and hoId the smoking punk over the al angle over the punk so the smoke goes inside" Do buming punk" 4。 Mr Brennan w川tum off the classroom lights" Use yo pa巾Cles moving・ Ho-d the f-ash-ight behind the conv of it, Do not cover the opening of the convection the smoke at eye leveI as it enters the convection 5。 Repeat steps 3 through 5 but use hot water as opp
Transcript of b!ow it out and hoId the smoking punk over the aluminum...
Name
1nvest冒gating How Warm Air and Cooi Air Move Lab
lntroduction
How can a hang g!ider stay up in the ai「for hours without a motor? How can a
bird soar over an open fie-d without fiapping its wings? They can do these things la「gely
because of heat transfer and the motion of the ai「. As the wings of a glide「 or a bird冊it
up in the air, g「aVfty puils it down・ This means that glider piiots and soaring birds need
to find constant upwa「d forces to stay in the air" Do you know where these huge fo「ces
COme f「om?
ln this lesson you w帖nvestigate how heat moves between the earth’s surface
and the air above it. How do s而ace temperature on the ea「th affec=he temperatu「e of
ai「 above it and the way air moves?
Problem: State the prob!em we are investigatjng in this lesson"
Hypothesis: Predict how the air wiII move when the surface is heated or cooIed.
Mate「ials
2 Convection Tubes
「 120 m」 plastic container of hot water
「 120 mL pIastic containe「 of c「ushed ice
「 piece of piastic tubing
「 sma旧unneI
「 punk stick
「 f看ashlight
「 sma看1 aluminum pan
Proced u res
「。 Co=ect mate「ials
2。 Attach the fumei and tubing to the Convection Tube with cold wate「"
3。 When you are ready, aSk Mr Brennan to light your group’s punk stick" lmmediate看y
b!ow it out and hoId the smoking punk over the aluminum pan. Hold the fumei at an
angle over the punk so the smoke goes inside" Do no=ouch the fumel with the
buming punk"
4。 Mr Brennan w川tum off the classroom lights" Use you「 flashIight to see the smoke
pa巾Cles moving・ Ho-d the f-ash-ight behind the convection tube and then at the top
of it, Do not cover the opening of the convection tube・ Knee! down so you can see
the smoke at eye leveI as it enters the convection tube"
5。 Repeat steps 3 through 5 but use hot water as opposed to coid wate「"
Name
Data
Cold Su巾ace
Hot Surface
(D「aw a -abeIed diag「am of both the coId wate「 and hot wate「 conveCtion tube・
Use ar「ows to Show the movement of the smoke)
Name
Analysis
」。 How did the temperature of the s而ace affect the temperature of the air above it?
2。 How did the air, Which was visible because of the smoke, mOVe in the convection
tube when the water under it was co!d? Explain why you think this happened?
3。 How did the air move in the convectjon tube when the water under it was hot?
Explain why you think this happened?
4“ Why do you think moistu「e formed on the inside of the convection tube with hot
water? How do you think this re!ates to cIoud formation on the ea「th?
5" AppIy what observed in the lesson to the Ea皿if the ea冊S S而ace is cold what wiIl
happen to air above it? 1f the s而ace is hot’What wi= happen to air above it?
