In this demonstration of chemical change, the presenter blows breath into a methylene blue solution releasing carbon dioxide which acidifies the water and changes it from a bright blue color to green.

Why does an egg float in salt water? Learn about density and buoyancy in this video segment adapted from ZOOM.

Watch warm water float on top of cold water in this video segment adapted from ZOOM.

This video segment adapted from ZOOM offers a clever demonstration of buoyancy by showing how to pour a cup of air into a cup filled with water.

Will a grape float in oil? Will a metal nut sink in corn syrup? Watch as the ZOOM cast tests the buoyancy of a variety of liquids and objects.

This is a comprehensive science textbook for Grade 12. You can download or read it on-line on your mobile phone, computer or iPad. Every chapter comes with video lessons and explanations which help bring the ideas and concepts to life. Summary presentations at the end of every chapter offer an overview of the content covered, with key points highlighted for easy revision. Topics covered are: organic molecules, organic chemistry, organic macromolecules, polymers, reaction rates, electrochemical reactions, the chemical industry, motion in two dimensions, mechanical properties of matter, work, energy and power, doppler effect, colour, 2D and 3D wavefronts, wave nature of matter, electrodynamics, electronics, electromagnetic radiation, optical phenomena and properties of matter, light, photoelectric effect, lasers. This book is based upon the original Free High School Science Text series.

This video segment adapted from NOVA/FRONTLINE examines the greenhouse effect, its role in keeping Earth habitable, and the industrial changes that have led to an increase in the planet's average temperature.

In this video adapted from the National Science Center, observe a demonstration to discover how helium gas is inert and hydrogen gas is reactive.

How can you lift a heavy metal table using air? In this video segment adapted from ZOOM, cast members succeed in lifting a table using their own breath and a few plastic bags.

This video from KET traces the energy transformations that occur when coal is burned to produce electricity. Some of the mechanical processes are also described.

Two astronauts aboard the International Space Station (ISS) describe mass and weight and the differences between the two in this video from NASA’s Teaching From Space initiative.

Students will explore the different properties of matter as they determine which materials are best suited for certain functions.

Join a group of middle-school students on a visit to a laboratory at the Massachusetts Institute of Technology, where they experiment with "mystery mud" and learn about the relationships between magnetism, particle motion, and changes in the state of matter.

In this interactive activity from ChemThink, examine the basic properties of matter at an atomic level and consider how various atoms affect the way a substance behaves.

This interactive periodic table developed for Teachers' Domain provides detailed information about the chemical properties of elements and illustrates the electron configurations that determine those characteristics.

This lesson is about the properties of matter, and it is geard towards lower elementary school students (specifically for 2nd grade). This lesson has many scaffolds for all learners including pictures, sentence frames, and precision partnering discussions. It also incorporates many engaging opportunities for students to learn these skills in a hands-on and engaging way!All cited sources can be found on the bottom of this lesson plan.Title Image: "Solid~Liquid~Gas" by Ajith_chatie is licensed under CC BY 2.0.

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

This video segment adapted from NOVA/FRONTLINE looks at American energy consumption and the resulting production of greenhouse gases.

This video segment from IdahoPTV's D4K explains and gives examples of the 4 states of matter: solid, liquid, gas, and plasma.