Khan Academy
Khan Academy: Dalton's Atomic Theory
An article describing Dalton's atomic theory. Learn how this theory was the first attempt to describe a fundamental part of matter, atoms. Article also discusses where the theory is incorrect based on the knowledge we have today.
Sophia Learning
Sophia: Conservation of Mass: Lesson 3
This lesson explains the law of conservation of mass within chemical reactions. It is 3 of 4 in the series titled "Conservation of Mass."
Sophia Learning
Sophia: Conservation of Mass: Lesson 4
This lesson explains the law of conservation of mass within chemical reactions. It is 4 of 4 in the series titled "Conservation of Mass."
Sophia Learning
Sophia: Conservation of Mass: Lesson 2
This lesson explains the law of conservation of mass within chemical reaction with audio and quiz questions.
Utah Education Network
Uen: Trb 5:1 Act. 4: Chem. Reactions Borax & Glue, Cream
For this experiment for Grade Five, students develop an understanding that chemical changes in matter do not affect the actual mass of the matter.
Wikimedia
Wikipedia: Materia
Explore the concept of matter in this Spanish-language encyclopedia entry. This site features the properties of matter, the Law of Conservation of Matter, and other important features of matter.
Open Curriculum
Open Curriculum: Thermodynamics
Students learn about the conservation of energy, aspects that affect energy in a system such as pressure and temperature, and to gain a better understanding of concepts such as entropy.
Science Struck
Science Struck: Law of Conservation of Mass Explained With Examples
Explains the Law of Conservation of Mass, or Law of Conservation of Matter, and gives two examples for it.