This lesson introduces students to the important concept of density. The focus is on the more easily understood densities of solids, but students can also explore the densities of liquids and gases. Students devise methods to determine...

Learn how salt increases the density of water and creates a condition of buoyancy.

A lab activity to show students how different densities of liquid layer on top of each other by using four different colored liquids that contain different levels of salinity. This activity can also be used in an ocean unit where...

[Free Registration/Login Required] An informational text explaining the density of solids and liquids. A question sheet is available to help students build skills in reading comprehension.

Learn about the relationship between vapor pressure of water and capacity of air to hold water vapor, the relationship between relative humidity and partial pressure of water vapor in the air, and how to calculate vapor density,...

Simple experiments dealing with water temperature and density that you can complete in the lab and at home.

Learn how the molecular movement in different temperature water affects the density of the liquid.

This large PDF file integrates math, science, and language into several lessons about characteristics of the oceans. Topics include ocean currents, tides, density, marine life, and pollution.

This project presents an interesting puzzle. A disk of wood will float face-up, that is, with its circular cross-section parallel to the surface of the water. A long log of wood, however, floats with the circular cross-section...

For this activity, students investigate whether objects and liquids float or sink when placed in water. As they proceed, they will develop an understanding of what density is. Student handouts are provided.

This experiment allows your students to study the effect of temperature on water motion and also to create their own density driven current.

Students investigate water by estimating how long it takes to freeze, then see if the ice cube will float in water, and eventually work with other items to see if they sink or float in water.

Become an engineer, and design a submarine that moves in the water like a real submarine. Try making it sink, float, and hover in the water.

This lesson helps students understand the variables that influence the abundance of phytoplankton. Students will make predictions about the timing of the spring phytoplankton bloom in the Gulf of Maine. Furthermore, data from buoy...

An introduction to density, mass, and volume with links to related books and activities.

In this lesson, young scholars will understand that temperature changes can cause density changes in water and in air.

This site gives background information to ocean water and its contents. It has a link to an detailed chart showing the minerals and their content amount in ocean water. It also has links to activities.

Demonstrate the relationship between water temperature and density using two clear plastic soda bottles.

Wikipedia offers a brief explanation on what specific gravity is and why it is measured in terms of density of water. The equation for its measurement is also given.

The King of Syracuse reportedly requested Archimedes' advice for determining if a crown was made with the appropriate mixture of gold and silver. The problem asks students to find the amount of water displaced in Archimedes' experiment...

A series of nine maps with accompanying explanations. They show how population growth has affected the environment around the world in terms of water availability, climate change, land and forest use, and more. There are both interactive...

A simple lab activity to demonstrate that ocean currents are influenced by changes in water density.

Students investigate density in this activity when they try to find out if oil or water has a higher density.

An experiment in density. After a review of floating and sinking of different materials, students test four bottles, all holding four ounces of water, to see if they will float or sink. They each contain a different density of sugar...