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This digital Google Slides activity helps students to understand how the word equation, chemical equation, and model of a reaction are related to one another. It's a great primer before covering balancing equations or conservation of mass because students will interact with these concepts via the activity before being formally introduced to them.
On the first slide of the activity, students review terms by dragging words from a word bank to label the types of equations and parts of an equation in a sample problem. The following slide includes directions for the activity. The next 7 slides each contain a different chemical reaction shown as a word equation, a chemical equation, and a model reaction. Students will read the word equation and use the chemical equation to complete the model reaction and count the number of atoms on each side of the equation.
The activity is scaffolded so that some parts of the model reaction are shown for certain problems. The equations become more complex and the last problem is a challenge problem! To differentiate this activity for more advanced students, you could Make a Copy of the Student Slides and delete some of the given parts of each problem. The Answer Key is included!
This activity supports NGSS MS-PS1-1 (Develop models to describe the atomic composition of simple molecules and extended structures) and MS-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). Before using this activity, students should have been introduced to the basic structure of a chemical equation (reactants yield products), as well as have a basic understanding that atoms bond together and rearrange in chemical reactions.
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