Demonstrate the effect that dissolving different amounts of salt in water has on the density of the liquid.

This lesson plan helps students discover the relationship between temperature, salinity, and density in coastal marine waters. Students access and retrieve water column profile data from the NANOOS and/or the WA Department of Ecology's...

In this activity, students will learn about density by determining how to make an egg float in water. By the end of the lesson, students will understand that density and weight are different and that density matters in floatation. They...

In this chemistry field lab, students will determine the density, pH, and water content of 4 types of soil. Students compare class data and write a lab report describing their results and then analyze their findings to report on the...

A United States map showing density levels of animals raised for food, accompanied by effects of factory farming and latest news on farming, animal welfare and food safety.

Students explore material properties in hands-on and visually evident ways via the Archimedes' principle. First, they design and conduct an experiment to calculate densities of various materials and present their findings to the class....

This video explains how the early Greek mathematician Archimedes discovered the principle relating density, volume, and displacement of water. [3:01] Includes a brief quiz and a list of additional resources to explore.

Young scholars use modeling clay, a material that is denser than water and thus ordinarily sinks in water, to discover the principle of buoyancy. They begin by designing and building boats out of clay that will float in water, and then...

Engage students in the study of the ocean and saltwater with these activities. Students will see that saltwater has different physical properties than freshwater - mainly density. This lesson can serve as a springboard into other...

Students observe Archimedes' principle in action in this challenge where a toy boat is placed in a container of water and a rock is placed on the floating boat. Students must explain why the water level rises/falls/stays the same based...

In simple terms, density is the mass of anything - including air - divided by the volume it occupies. In the metric system, which scientists use, we usually measure density in terms of kilograms per cubic meter. The air's density depends...

A student learning module with a focus on the relationship of temperature and salinity with density, ocean-influenced weather patterns, and how light and sound move through ocean water.

Students study the chemical characteristics of the World Ocean, water chemistry, element cycles, and chemical resources in this multi-media learning module.

Illustrated tutorial explains the numerous factors which shape ocean currents. Animations help students visualize how these aspects constantly affect the water movement in the ocean and how scientists use this information to study ocean...

In this activity, students use the virtual lab to create dilute solutions from a concentrated stock solution of acids or bases. They must first calculate the correct volumes of concentrated acid solution and water to mix together to...

Describes what relative humidity is, shows how it is calculated, and how it is related to evaporation and condensation.

[Free Registration/Login may be required to access all resource tools.] How different densities of water drive ocean currents.

Compare the density of water, corn oil and corn syrup by trying to float different items in each material and then putting all three liquids into one container.

Students measure the permeability of different types of soils, compare results and realize the importance of size, voids and density in permeability response.

Students contrast the densities of oil and water in this lab activity. Can be done in groups or individually. This resource is in PDF form; requires Adobe Reader.

This interactive brainteaser from the NOVA: "Voyage of Doom" Web site challenges you to figure out what happens to the water level when a rock is resting in a boat and when it is submerged in water.

Simulation of an Atwood machine where two masses of varying densities are suspended in water using a pulley system. Adjust the densities of the masses, their positions and the water level to see how the changing gravitational, buoyant,...

Middle schoolers learn about the factors that drive ocean currents by measuring the density of ocean water and tap water.

SPRK STEM challenges are fun, interactive activities that challenge students to use creativity and team-work to move through simple steps of the design process in order to build Sphero-based creations. The Hydro-hypothesis challenge...