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![A facilitator holds a bottle while a learner wafts a scent to her nose](https://nisenet.org/sites/default/files/styles/curated_list_large_cropped/public/2022-02/ExSci_Chem_20180530_1735.jpg?h=265e640d&itok=moVmabyK)
Exploring Size - Scented Solutions
In this activity, learners sniff a series of diluted scent solutions to discover they can smell nano-sized particles they can't see.
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![Surface Area activity components including signs, activity materials and guides.](https://nisenet.org/sites/default/files/styles/curated_list_large_cropped/public/images/catalog/surface_area.jpg?h=b7796557&itok=ECS2dtXS)
Exploring Properties - Surface Area
In this activity, learners compare the reaction rate of an effervescent antacid tablet that is broken in half with one that is broken into many pieces.
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![young learners placing mini teacup in water to see what happens](https://nisenet.org/sites/default/files/styles/curated_list_large_cropped/public/2022-01/20151009_1294.jpg?h=265e640d&itok=ioZOtzL2)
Exploring Forces - Gravity
In this activity, learners will discover that size can affect the way materials like water behave.
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![Group of students building a carbon nanotube model out of balloons](https://nisenet.org/sites/default/files/styles/curated_list_large/public/catalog/programs/tabletop%20balloons2%20April%2007.jpg?itok=lU1EqlBg)
Balloon Nanotubes Tabletop
In this activity, learners build a model of carbon nanotubes out of balloons to explore the material's structure and properties.
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![Poster showing the different forms fo carbon molecules](https://nisenet.org/sites/default/files/styles/curated_list_large/public/2020-12/carbonnanotubes_focposter_jan10.jpg?itok=zKjj8kb_)
World of Carbon Nanotubes Stage Presentation and Posters
Poster and slide presentation on carbon nanotubes.
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![Learner experimenting with magic sand](https://nisenet.org/sites/default/files/styles/curated_list_large/public/NanoDays2009_263.jpg?itok=m940uHEo)
Magic Sand / Nanosurfaces
In this activity, learners discover that "magic" sand repels water because of a nanoscale hydrophobic coating on the grains of sand.
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![Facilitator showing learners the lotus leaf effect](https://nisenet.org/sites/default/files/styles/curated_list_large/public/catalog/programs/Lotus_effect_EExpo2008.jpg?itok=6w3QNWri)
Lotus Leaf Effect
In this activity, learners explore how some leaves are self cleaning and repel water due to their nanoscale features.
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![Field of solar panels](https://nisenet.org/sites/default/files/styles/curated_list_large_cropped/public/Energy_solarpanels.jpg?h=8876dcd3&itok=A97_ICpU)
Tiny Solutions to Our Big Energy Problem
In this stage presentation, learners hear a brief overview of energy sources and our current energy crisis and discusses a variety of ways that nanotechnology can improve the situation.
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Inkjet Printer
In this activity, learners explore how liquids behave differently at the small scale by examining how inkjet printers produce tiny, precise drops of ink.
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![Learners cut strips of paper in half](https://nisenet.org/sites/default/files/styles/curated_list_large_cropped/public/NanoDays2009_259.jpg?h=a5eb5da0&itok=HmoG2Ehs)
Cutting It Down to Nano
In this activity, learners cut a small strip of paper in half as many times as they can to explore scale.
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