Description
How are they the same?How are they different?
One floats and one doesn't! Which is which? Great for teaching the skills of observation and deduction! Although these two shiny, metal spheres have about the same mass, one has a diameter significantly smaller than the other, making their densities vastly different. Seeing the large one float in water seems unbelievable! Bowl not included.

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NGSS
This product will support your students' understanding of the Next Generation Science Standards (NGSS)*, as shown in the table below.Elementary | Middle School | High School | ||
2-PS1-1 Students can use the Steel Spheres Density Kit in an investigation to describe and classify different kinds of materials by their observable properties. 2-PS1-2Students can analyze data obtained from testing the two spheres in the Steel Spheres Density Kit to determine which materials have the properties that are best suited for an intended purpose. 3-PS2-1Students can use Steel Spheres Density Kit in an investigation to provide evidence of the effects of balanced and unbalanced forces on the motion of an object. 5-PS1-1Students can use the Steel Spheres Density Kit in an investigation to develop a model to describe that matter is made of particles too small to be seen. 5-PS1-3Students can make observations and measurements of the steel spheres to identify materials based on their properties. | MS-PS1-1 Students can use the Steel Spheres Density Kit in an investigation to develop models to describe the atomic composition of simple molecules and extended structures. MS-PS2-2Students can use the Steel Spheres Density Kit in an investigation to provide evidence that the change in an object's motion depends on the sum of the forces on the object and the mass of the object. | HS-PS1-1 Students can use the Steel Spheres Density Kit in an investigation to predict properties of elements. Students can use the Periodic Table as a model to predict the relative properties of elements based on the patterns of electrons in the outermost energy level of atoms. HS-PS2-6Students can use the Steel Spheres Density Kit in an investigation to communicate scientific and technical information about why the molecular-level structure is important in the functioning of designed materials. |
2-PS1-2
5-PS1-1
5-PS1-3
MS-PS1-1
HS-PS1-1
HS-PS2-6
Students can use the Steel Spheres Density Kit in an investigation to make sense of density and the forces that act upon them, specifically, buoyancy. Secondary students can do the math to determine the density of each sphere. Density is a fundamental property of matter. Density is defined as mass divided by unit volume, Buoyancy is the upward force experienced by a submerged object. The size of the buoyant force on an object submerged in any liquid is the same as the weight of the displaced liquid. The principle of buoyancy is called Archimedes' Principle.
53-PS2-1MS-PS2-2
Students can use Steel Spheres Density Kit in an investigation about density and buoyancy. Although both spheres have the same mass, effects of balanced and unbalanced forces on the motion of the spheres is quite different. An outstanding inquiry activity.
* NGSS is a registered trademark of Achieve. Neither Achieve nor the lead states and partners that developed the Next Generation Science Standards were involved in the production of, and do not endorse, this product.
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