In this lesson students will develop an evidence-based argument after investigating the product safety, performance, and cost of a variety of cleaning and disinfecting products designed to remove germs.  Students will be introduced to principles of sustainable design, life-cycle thinking, and how to identify safer products to certifications.Except where otherwise noted, this work by Saskia van Bergen (Washington Department of Ecology), Vickei Hrdina (ESD 112), and Carissa Haug (NCESD) is licensed under Creative Commons Attribution License 4.0.  All logos and trademarks are property of their respective owners.  

Astronomer Carl Sagan discusses the possibility of time travel in this audio-enhanced interview from the NOVAWeb site.

Add different salts to water, then watch them dissolve and achieve a dynamic equilibrium with solid precipitate. Compare the number of ions in solution for highly soluble NaCl to other slightly soluble salts. Relate the charges on ions to the number of ions in the formula of a salt. Calculate Ksp values.

Add different salts to water, then watch them dissolve and achieve a dynamic equilibrium with solid precipitate. Compare the number of ions in solution for highly soluble NaCl to other slightly soluble salts. Relate the charges on ions to the number of ions in the formula of a salt. Calculate Ksp values. Arabic Language.

This animation adapted from NASA shows the orbital paths of spacecraft in NASA's Earth Observing Fleet that are a source of wide-scale, primary research about Earth.

There are many misconceptions about the chemistry concept, “Conservation of Mass”. Thus, the aim of this video lesson is to teach students about the chemical concept of Conservation of Mass through several chemistry experiments. The students will carry out experiments while assisting a fortune teller named Pak Belalang to gain victory for his kingdom. In an effort to help Pak Belalang, students should be able to answer all the questions related to the Conservation of Mass that are posed by an evil witch. In this video, materials such as a box of matches, a closed and open container, a box of panadol soluble tablets (Alka-Seltzer), and weighing scales are needed. At the end of the lesson, students will be able to see that mass is “conserved”. The lesson will take up to 60 minutes to complete.

This activity is a field investigation of puddles where students gather data and record their findings.

This is an introductory physics lab where students will review scientific measurement concepts, and then develop a procedure, in which they will use the concepts of proper precision in measurement and significant figures, to determine the density of a marble.

This activity is a lab investigation where students collect and analyze data on towers built with various components and compare the two.

In this activity, learners explore electronics and motion by making a Scribbling Machine, a motorized contraption that moves in unusual ways and leaves a mark to trace its path. It's made from simple materials and is based on the idea of motion created by an offset motor. Try using harvested motors and switches from discarded toys and electronics to make your Scribbling Machine - this not only keeps costs down, but is a playful and inventive way to explore how everyday objects work. To take the activity further, you can also incorporate PicoCrickets to make your Scribbling Machine more intelligent and to explore computers.

This laboratory activity demonstrates how seismic waves are generated and helps students understand how they can reveal the composition of Earth's inner layers. Students will construct models by filling shoe boxes with various materials, drop rocks on them to generate 'seismic waves', record the waves, and make observations about their differences.

Dope the semiconductor to create a diode. Watch the electrons change position and energy.

Students learn how to classify materials as mixtures, elements or compounds and identify the properties of each type. The concept of separation of mixtures is also introduced since nearly every element or compound is found naturally in an impure state such as a mixture of two or more substances, and it is common that chemical engineers use separation techniques to separate mixtures into their individual components. For example, the separation of crude oil into purified hydrocarbons such as natural gas, gasoline, diesel, jet fuel and/or lubricants.

This lab is a two part investigation on separating a solid from a liquid where students are asked to develop their own investigable question and carry out the experiment on day two.

Module outline and learning resources for H81SPF Separation Process Fundamentals.

The module aims to introduce basic principles and concepts behind basic unit operations used in chemical and environmental processes and applications. The module enables understanding so that students are able to apply separation processes in given applications and use appropriate calculation techniques to size process equipment.

Students learn about STEM education through an engineering design challenge that focuses on improving building materials used in shantytowns. First, they consider the factors that lead to shantytown development. After researching the implications of living in shantytowns, students design, build and test cement-based concrete block composites made of discarded and/or recycled materials. The aim is to make a material that is resistant to degradation by chemicals or climate, can withstand natural disasters, and endure through human-made conditions (such as urban overcrowding or pollution). The composites must be made of materials that are inexpensive and readily available so that they are viable alternative in shantytown communities. Students assess the results both chemically and physically and then iterate their designs with the materials that proved to be strongest.

This chemistry lesson uses Sharpie Markers, rubbing alcohol and t-shirts to make a exciting tie-die looking t-shirt

This article, written for students in grades 4-5, introduces the concept of albedo and describes the shrinking of Arctic sea ice. Modified versions are available for students in younger grades.

In this decision-making exercise, students investigate what would occur if a dam were built along Nanticoke Creek, a real stream just north of West Corners near the Village of Endicott, New York. They will use topographic maps to determine how much area would be flooded by the new reservoir, to study river drainages, and to consider the impacts of dams on a region. They must also consider rivers in the context of their relation to humankind. The exercise can be extended to other, more local locations having similar topography.

In this adapted ZOOM video segment, cast members calculate how much water they each use during a typical shower. They compare their results to their original predictions.