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Disappearing Water
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In this outdoor water activity, learners explore evaporation by painting with water and tracing puddles. Learners will discover that wet things become dry as the water evaporates.
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What's the Matter
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In this activity, learners identify different classes of matter based on physical properties.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-146.jpg?itok=3CL1z6z1)
Balloon Staging
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In this activity, learners simulate a multistage rocket launch using party balloons, fishing line, straws, and a plastic cup.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-634.gif?itok=3YcFuZuy)
Inflate-a-mole
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In this activity, learners conduct an experiment to find the volume of one mole of gas. Learners capture sublimated gas from dry ice in a ziploc bag and use water displacement to measure its volume.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-867.jpg?itok=VUUITPsC)
Ramps 2: Ramp Builder
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In this inquiry-based learning activity, learners design, build, and test their own ramps. They are introduced to a variety of materials and explore putting them together.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-695.gif?itok=zMBIDtCA)
Mass of the Earth
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In this activity, learners use basic measurements of the Earth and pieces of rock and iron to estimate the mass of the Earth.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-154.jpg?itok=oIMfm3f3)
Balloon Car
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In this activity, learners explore force and motion by constructing cardboard cars that are propelled by balloons.
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Algebra: Aw Chute!
Source Institutions
In this math lesson, learners determine and compare the rate of descent of various learner-constructed parachutes. Learners construct parachutes that will have maximum hang times.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-937.jpg?itok=hGgsQmMI)
Cabbage Juice Indicator
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In this chemistry activity, learners make indicator solution from red cabbage. Then, learners test everyday foods and household substances using the cabbage juice indicator.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-517.jpg?itok=7phaKEp-)
Changing Shadows
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In this sunny day, outdoor activity, learners observe changes in shadows over time. The activity also helps to develop a sense of the Earth's motion.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-381.jpg?itok=VeYJO-No)
Test the Finger Wrinkle Hypothesis
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Learners create a tool to measure how well they grip a wet object when their fingers are smooth versus wrinkly. Are smooth or wrinkly fingers better at holding on to the object?
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-430.jpg?itok=SPZy_1rR)
Capturing Carbon Dioxide
Source Institutions
In this activity, learners investigate carbon sequestration by creating a carbonated beverage out of apple juice and dry ice.
Build A Hydrometer
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In this activity, learners will explore how a hydrometer works by building a working model and conducting experiments.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-249.gif?itok=opFkgZ0V)
Invisible Investigations
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Using indirect observational methods, learners distinguish between charged and uncharged objects.
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Challenge: Microgravity
Source Institutions
In this activity about the circulatory system and space travel (on page 38 of the PDF), learners use water balloons to simulate the effects of gravity and microgravity on fluid distribution in the bod
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Build an Overhead Projector Spectroscope
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This activity guide includes instructions for building a spectroscope using a standard classroom overhead projector.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-879.jpg?itok=8S4xEFD9)
The Ups and Downs of Thermometers
Source Institutions
In this activity, learners examine the parts of a thermometer. After placing a thermometer in hot and cold water, learners look at molecular model animations of the liquid in a thermometer.
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Floating and Falling Flows
Learners create beautiful fluid motion. They explore fluid dynamics, surface tension, solubility, and buoyancy while mixing liquids together.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-145.jpg?itok=dVjivQ94)
Cable Car
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In this activity, learners string a line across the room and build cable cars that can move from on end to the other.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-766.jpg?itok=FFzaLM5f)
Fishy Observations
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In this activity (page 1 of the PDF under SciGirls Activity: Rabbits), learners will visit a zoo, aquarium, or pet store to view a variety of fish.