dana mandÍkovÁ, jitka houfkovÁ, zdenĚk drozd department of physics education,
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Experiments in Science at Primary School. Experiments with air. DANA MANDÍKOVÁ, JITKA HOUFKOVÁ, ZDENĚK DROZD Department of Physics Education, Faculty of Mathematics and Physics , Charles University in Prague. Experiments in Science at Primary School. - PowerPoint PPT PresentationTRANSCRIPT
Košice 2013
DANA MANDÍKOVÁ, JITKA HOUFKOVÁ, ZDENĚK DROZD
Department of Physics Education, Faculty of Mathematics and Physics,
Charles University in Prague
Experiments in Science at Primary School
Experiments with air
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Experiments in ScienceExperiments in Scienceat Primary Schoolat Primary School
Seminar designed for future primary school Seminar designed for future primary school teachers, students of Pedagogical facultyteachers, students of Pedagogical faculty, , with goal:with goal:
to gain the interest of pre-service primary to gain the interest of pre-service primary school teachers and motivate them to future school teachers and motivate them to future studiesstudies
to familiarize them with experiments from to familiarize them with experiments from the parts of natural science that are taught the parts of natural science that are taught at primary school at primary school
to give them an opportunity to try those to give them an opportunity to try those experiments themselvesexperiments themselves
to correct their misconceptionsto correct their misconceptions
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Experiments in ScienceExperiments in Scienceat Primary Schoolat Primary School
The emphasis is put on:The emphasis is put on:
hands-on activities hands-on activities self-production of simple teaching self-production of simple teaching
aids and toysaids and toys correct explanations of shown correct explanations of shown
phenomena phenomena ways how to present them to young ways how to present them to young
pupilspupils the most common misconceptions the most common misconceptions
are mentioned and discussed, tooare mentioned and discussed, too
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Experiments with airExperiments with air
Air is all around us, but we cannot see it Air is all around us, but we cannot see it nor smell it. nor smell it.
Suggest an experiment by which the Suggest an experiment by which the existence of air can be demonstrateexistence of air can be demonstratedd..
Pour air from one glass to another under Pour air from one glass to another under the water level.the water level.
Is it possible to dip Is it possible to dip a a piece of paper into piece of paper into water such a way to it remains drywater such a way to it remains dry??
Examples of problems solved during the seminarExamples of problems solved during the seminar
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Experiments with airExperiments with air Who poured water from a bottle most Who poured water from a bottle most
quickly?quickly?
Tornado. Tornado.
Does the air have anyDoes the air have any weight? weight? Estimate, Estimate, how much does weigh the air in this room.how much does weigh the air in this room.
WWeigheighing of airing of air..
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Weighing airWeighing air
What we need: What we need:
Plastic bottle with Plastic bottle with valve; weight valve; weight (accuracy 0.1 g)(accuracy 0.1 g) or or rocker armrocker arm; pump; ; pump; plastic hose; plastic hose; bucket bucket with waterwith water
2 l ~ 2.5 g2 l ~ 2.5 g
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Measuring air pressureMeasuring air pressure
magic glassmagic glass
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TorricelliTorricelli’s’s experiment with water experiment with water
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TorricelliTorricelli’s’s experiment with water experiment with water
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TorricelliTorricelli’s’s experiment with water experiment with water
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TorricelliTorricelli’s’s experiment with water experiment with water
hh = 10 m = 10 m
ppAA = = hhgg
ppAA = 10·1000·10 = 10·1000·10 Pa Pa
ppAA = 10 = 105 5 PaPa
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Lifting the airLifting the air
ppAA = 10 = 105 5 Pa = 10Pa = 1055 N N//mm22 = 10 N = 10 N//cmcm22
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Collapse of a canCollapse of a can
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Collapse of a canCollapse of a can
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Magdeburg hemispheresMagdeburg hemispheres
How big is the force with which are the How big is the force with which are the hemispheres pressed together?hemispheres pressed together?
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The egg in the bottleThe egg in the bottle
Typical Typical misconception – the misconception – the oxygen burns out, in oxygen burns out, in the bottle is less gas the bottle is less gas and underpressure and underpressure pulls the egg into pulls the egg into the bottlethe bottle
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Drowned candleDrowned candle
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Balloon in a bottleBalloon in a bottle How to inflate the balloon inside the How to inflate the balloon inside the
bottle?bottle?
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When air is missingWhen air is missing
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When air is missingWhen air is missing
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When air is missingWhen air is missing
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When air is missingWhen air is missing
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Airflow Airflow
Blow between two papers or above a paperBlow between two papers or above a paper
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AirflowAirflow
Spray from strawsSpray from straws
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Some more experimentsSome more experiments
A flying tea bagA flying tea bag
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Falling conesFalling cones
Magnus effectMagnus effect
flow of real gas must flow of real gas must be taken into accountbe taken into account
v1 > v2
p1 < p2
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Some more experimentsSome more experiments
Inflating the long plastic “sleeve”Inflating the long plastic “sleeve” Inflating the long plastic “sleeve”Inflating the long plastic “sleeve”
Try to blow the small Try to blow the small
paper ball in the bottlepaper ball in the bottle
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Making flying strawsMaking flying straws
What we need:What we need:
Drinking straws, Paper, Glue, ScissorsDrinking straws, Paper, Glue, Scissors
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What we need:What we need:
Plastic bottle, Hose,Plastic bottle, Hose,Plastic pipe, Paper,Plastic pipe, Paper,Glue, Scotch tape, Glue, Scotch tape, ScissorsScissors
Making air rocketsMaking air rockets
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Thank youThank you
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[email protected]@mff.cuni.cz
[email protected]@mff.cuni.cz
[email protected]@mff.cuni.cz