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Below the Surface: Surface Tension II
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In this activity learners explore surface tension. Why are certain objects able to float on the surface of water and how do detergents break the surface tension of water?
Differing Densities: Fresh and Salt Water
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In this activity, learners visualize the differences in water density and relate this to the potential consequences of increased glacial melting.
Oh Buoy!
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Learners work in pairs to design, construct, and test a device that exhibits positive, neutral, and negative buoyancy. They test a number of different objects in water to see if they sink or float.
A Hole in the Ground
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Learners build models of sinkholes to gain an intuitive knowledge of their physical aspects.
Filtration Investigation
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In this activity, learners explore how engineering has developed various means to remove impurities from water.
Let's Look at Water & the Scientific Method
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This activity has learners observe water and compare it to other liquids.
We all Scream for Ice Cream
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In this activity, learners observe how salinity affects the freezing point of water by making and enjoying ice cream.
What Does Life Need to Live?
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In this astrobiology activity (on page 11 of the PDF), learners consider what organisms need in order to live (water, nutrients, and energy).
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.
That Sinking Feeling
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In this quick activity, learners observe how salinity and temperature affect the density of water, to better understand the Great Ocean Conveyor.
OBIS Oil Spill
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In this outdoor activity, learners simulate an oil spill using popcorn (both oil and popcorn float on water), and estimate the spill's impact on the environment.
Floodplain Modeling
In this design-based lesson, learners study flood dynamics as they modify a riverbed with blockages or levees to simulate real-world scenarios.
Conductivity: Salty Water
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Water, whether fresh or salty, serves as one of the best electrical conductors on the planet. Does salt effect its conductivity?
Leaf it to Me
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In this activity, learners observe the effect of transpiration as water is moved from the ground to the atmosphere.
Buoyancy Bulls-Eye
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In this hands-on activity, learners will construct a scuba diver that can float in order to explore how sea creatures stay neutrally buoyant in the ocean and to see what kinds of forces might be influ
What's So Special about Water: Solubility and Density
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In this activity about water solubility and density, learners use critical thinking skills to determine why water can dissolve some things and not others.
Storm Water Runoff Pollution
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This activity (located on page 8 of the PDF) introduces learners to the concept of Non-point Source Pollution--what happens when rain washes garbage and other pollutants into rivers and lakes.
Can Nutrients in Water Cause Harm?
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In this water pollution activity, learners create pond water cultures and investigate the effects of adding chemicals or natural nutrients.
What's So Special about Water: Surface Tension
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In this three-part activity, learners play a game and conduct two simple experiments to explore water and surface tension. Learners will have fun discovering how water "sticks" together.
Shrinking Cups
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This is a quick activity (on page 2 of the PDF under Gecko Feet Activity) about the forces of gravity and surface tension and how their behavior is influenced by size.