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No bones about it!
Source Institutions
This is an activity (located on page 3 of the PDF) about the mixture of materials in bone and how they affect its strength.
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Self-Portrait Silhouettes: Activity 1
Source Institutions
In this activity, learners make a photographic image--without a camera!
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Spinning Illusions
Source Institutions
In this activity, learners construct three optical illusion toys to examine how our brains play tricks on what we see.
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TerrAqua Investigation Column: What is the Land-Water Connection?
Source Institutions
In this investigation, learners plant seeds in a 2-liter bottle filled with soil that is connected to a water source below. Over the next few weeks, learners observe how the plants grow.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-750.jpg?itok=0k_dEQga)
Shapes and Angles
Source Institutions
In this activity (page 7 of PDF), learners will identify the general two-dimensional geometric shape of the uppermost cross section of an impact crater.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-693.jpg?itok=bg_DzERZ)
Gymnast
Source Institutions
In this physics activity, learners build a toy with a figure that spins around like a gymnast on the high bar.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-543.jpg?itok=OJaWZAMX)
Moo Glue
Source Institutions
Using a milk-based recipe, learners create "moo glue" which is basically white school-type glue. The "secret ingredient" in milk that helps make glue is a chemical called casein.
How Do Antacids Work?
Source Institutions
You just ate a big meal and feel heartburn coming on. You take an antacid and feel better. Why? Heartburn is caused by stomach juice (an acid) burning the esophagus.
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Thrown For A Curve: Pitch Like A Big Leaguer
Source Institutions
You may have tried to throw a curveball or a slider, or even a screwball, with an ordinary baseball and found it difficult to do.
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Leaning Tower of Pasta
Learners build structures from spaghetti and marshmallows to determine which structures are able to handle the greatest load.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-785.jpg?itok=cz3tjkFs)
A Spray Spree
Source Institutions
In this activity, learners explore water pressure by conducting an experiment with a garden hose. Learners build a testing apparatus and create PVC nozzles with different sized holes.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-928.jpg?itok=95pFnCEL)
Confetti Launcher
Source Institutions
Hooray! In this design challenge activity, learners invent a device that launches a spoonful of confetti into the air. Learners are encouraged to create the biggest cloud of confetti possible.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-596.jpg?itok=w7rKDEN5)
Air Cannon
Source Institutions
In this activity (page 1 of PDF under SciGirls Activity: Forecasting), learners will construct an air cannon by cutting a hole in the bottom of a bucket and stretching a garbage bag over the other end
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The Ups and Downs of Body Temperature
Source Institutions
In this activity (1st on the page), learners explore circadian rhythms by keeping track of their body temperature.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-121.jpg?itok=CE7eEfd_)
Swing in Time
Learners build and investigate pendulums of different lengths. They discover that the longer the string of the pendulum, the longer the time it takes to swing.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-647.jpg?itok=dSDFLha9)
Mirror Image
Source Institutions
In this activity, learners investigate procedural memory.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-597.jpg?itok=uipXZ2NV)
Science at the Waterpark!
Source Institutions
This activity (on page 2 of the PDF under SciGirls Activity: Water Slides) is a full inquiry investigation into speed and motion and takes place at a water park.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-583.jpg?itok=TOUWT4CH)
Hockey Stick Power!
Source Institutions
This activity (on page 2 of the PDF under SciGirls Activity: Hockey) is a full inquiry investigation into how a hockey stick’s flex affects shooting power and accuracy.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-790.jpg?itok=rfI4RZoG)
You're Grounded
Source Institutions
In this engineering activity, learners test the stability of towers they build out of cups, discovering that structures with more mass in the base are more stable.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-326.jpg?itok=toqnVUAO)
Solar Water Heater
Learners work in teams to design and build solar water heating devices that mimic those used in residences to capture energy in the form of solar radiation and convert it to thermal energy.