Showing results 1 to 20 of 143
AvalancheAdd to list Details
In this geology activity, learners create a model using a mixture of salt and sand inside a CD case. When the case is tilted or inverted, the mixture dramatically sorts into a layered pattern.
Changing the Density of a Liquid: Adding SaltAdd to list Details
Learners see that a carrot slice sinks in fresh water and floats in saltwater.
Density: Make a golf ball float!
In this activity (on page 2 of the PDF), the learner places a golf ball between salt water and colored fresh water. The golf ball is not as dense as the saltwater.
The Pulse of GravityAdd to list Details
In this astronomy activity (page 3 of the PDF), learners will examine the effects of gravity on a person’s pulse and explore how gravity can differ from planet to planet.
Separation AnxietyAdd to list Details
In this activity, learners discover the primary physical properties used to separate pure substances from mixtures.
Salt 'n LighterAdd to list Details
In this activity, learners discover that as the salinity of water increases, the density increases as well. Learners prove this by attempting to float fresh eggs in saltwater and freshwater.
Comparing the Density of an Object to the Density of WaterAdd to list Details
Learners compare the weight of equal volumes of wax, water, and clay. Learners discover that since the wax weighs less than an equal volume of water, it is less dense than water and will float.
Investigating Density Currents
In this lab activity, learners explore how to initiate a density current. Learners measure six flasks with different concentrations of salt and water (colored blue).
Atoms and Matter (3-6)
In this activity, learners build models of atoms and molecules, then consider their role in different phases of matter, density, and mixtures and solutions.
Water Body Salinities II
In this activity, learners discuss the different salinities of oceans, rivers and estuaries.
Defining DensityAdd to list Details
In this introductory demonstration and activity, learners are introduced to the concept of density as they explore a rock and a wooden block in water.
Changing the Density of an Object: Changing ShapeAdd to list Details
Learners will see that changing the shape of an object, like a clay ball, that is more dense than water, can affect whether the object will sink or float.
Diet LightAdd to list Details
In this quick activity, learners observe how the added sugar in a can of soda affects its density and thus, its ability to float in water.
Plot the Dot: A Graphical Approach to DensityAdd to list Details
In this activity, learners work in groups to determine the mass and volume of four samples: glass marbles, steel washers or nuts, pieces of pine wood, and pieces of PVC pipe.
Heavyweight Champion: Jupiter
In this activity, learners confront their perceptions of gravity in the solar system.
Cooking with Chemistry
In this activity, learners experiment with different variables in making hollandaise sauce to achieve the correct texture and consistency.
Rainbow Density ExperimentAdd to list Details
In this colorful activity (page 6 of the PDF), learners will make a multicolor density column by using different concentrations of sugar solutions.
How Can Gravity Make Something Go Up?
In this activity, learners use cheap, thin plastic garbage bags to quickly build a solar hot air balloon. In doing so, learners will explore why hot air rises.
Electric Paddle Boat
In this activity, learners build an electric two-paddle boat using paint paddles, plastic knives, and empty water bottles.
In this demonstration, learners observe the effects of density and pressure. A "diver" constructed out of a piece of straw and Blu-Tack will bob inside a bottle filled with water.