Law of Conservation of Mass (pg217)
MrAsciencedotcom
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Resource Type
Standards
NGSSMS-PS1-4
NGSSMS-PS1-2
NGSSMS-PS1-5
NGSSMS-PS1-1
Formats Included
- Word Document File
Pages
2 pages
MrAsciencedotcom
17 Followers
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This is a bundle of all of the resources I use to teach Unit 2: Chemistry in 8th grade. It includes worksheets, labs, PowerPoints, and even the Unit 2 Test. The pages range from 201-222 in students' binders. This means from Unit 2-Page 1, all the way to Unit 2-Page 22.Price $14.99Original Price $19.00Save $4.01
This bundle includes an entire year's worth of material. It includes lessons, labs, projects, tests and more. The seven units include are as follows:Unit 1 - Forces and MotionUnit 2 - ChemistryUnit 3 - GeneticsUnit 4 - EvolutionUnit 5- AstronomyUnit 6 - Earth's SystemsUnit 7 - Environmental ScienceTPrice $100.00Original Price $139.00Save $39.00
Description
Today we introduced a chemistry topic that we’ve been hinting at all along: The Law of Conservation of Mass. The law basically says “No matter can ever be created or destroyed” and it flew in the face of conventional wisdom that predated modern science. Today we use it to explain everything from rain to boiling water to fire. And the bottom line is you can’t create or destroy an atom; they can only be rearranged. Even more modern topics like nuclear weapons don’t necessarily break the law.
After discussing all of this with my students, we completed a quick lab activity (posted above) and post-lab assignment. The lesson? You can’t break this law, no matter how hard you try.
Total Pages
2 pages
Answer Key
Not Included
Teaching Duration
45 minutes
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Standards
to see state-specific standards (only available in the US).
NGSSMS-PS1-4
Develop a model that predicts and describes changes in particle motion, temperature, and state of a pure substance when thermal energy is added or removed. Emphasis is on qualitative molecular-level models of solids, liquids, and gases to show that adding or removing thermal energy increases or decreases kinetic energy of the particles until a change of state occurs. Examples of models could include drawings and diagrams. Examples of particles could include molecules or inert atoms. Examples of pure substances could include water, carbon dioxide, and helium.
NGSSMS-PS1-2
Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred. Examples of reactions could include burning sugar or steel wool, fat reacting with sodium hydroxide, and mixing zinc with hydrogen chloride. Assessment is limited to analysis of the following properties: density, melting point, boiling point, solubility, flammability, and odor.
NGSSMS-PS1-5
Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved. Emphasis is on law of conservation of matter and on physical models or drawings, including digital forms, that represent atoms. Assessment does not include the use of atomic masses, balancing symbolic equations, or intermolecular forces.
NGSSMS-PS1-1
Develop models to describe the atomic composition of simple molecules and extended structures. Emphasis is on developing models of molecules that vary in complexity. Examples of simple molecules could include ammonia and methanol. Examples of extended structures could include sodium chloride or diamonds. Examples of molecular-level models could include drawings, 3D ball and stick structures, or computer representations showing different molecules with different types of atoms. Assessment does not include valence electrons and bonding energy, discussing the ionic nature of subunits of complex structures, or a complete depiction of all individual atoms in a complex molecule or extended structure.
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