17 questions
9th - 9th Grade
Science
Types of Reactions is a free printable Grade 9 science worksheet with an answer key that helps students classify chemical reactions and balance equations. Across 17 questions, including drag-and-drop and multiple-choice items, students identify synthesis, decomposition, combustion, and other reaction types from chemical equations, distinguish reactants from products, and determine the correct coefficients needed for balanced equations. The worksheet also checks students’ understanding of reaction patterns, including synthesis as the formation of one complex compound and combustion as a reaction involving oxygen that produces carbon dioxide and water. Use it for independent practice, a classroom review, or an assessment after introducing reaction classification and balancing. The answer key supports efficient checking and helps teachers identify whether students need more practice reading equations, recognizing reaction structures, or applying coefficients without changing subscripts.
Worksheet settings
Font size
WorksheetsAnswer KeyReactant
2
decomposition
no change; it's balanced as is
Synthesis
2
Combustion
Synthesis
carbon dioxide and water
oxygen
2
Combustion
Synthesis
Decomposition
This Grade 9 science worksheet uses three drag-and-drop items and multiple-choice questions to practise classifying chemical equations as synthesis, decomposition, combustion, or related reaction types. Students also identify reactants and products, recognize combustion patterns, and select coefficients to balance equations without changing chemical subscripts.
Introduce the worksheet by modelling how to compare the arrangement of reactants and products: one complex product suggests synthesis, one compound breaking apart suggests decomposition, and a reaction with oxygen producing carbon dioxide and water suggests combustion. Then have students complete the drag-and-drop classification items before using the coefficient questions to discuss why coefficients, rather than subscripts, balance an equation.
Students may confuse synthesis with decomposition by overlooking whether substances combine or split apart, or misidentify combustion when they fail to look for oxygen and the carbon dioxide-and-water products. In the balancing questions, watch for students changing subscripts instead of coefficients, miscounting atoms, or treating an already balanced equation as needing a change. They may also reverse the roles of reactants and products.
Wayground provides this worksheet as a printable PDF and as a digital quiz, and it includes a complete answer key for the drag-and-drop and multiple-choice questions. Printable submissions can be graded by scanning student work with the Wayground for Teachers app. The PDF option can also support schools that are reducing screen time.
Use the worksheet’s Advanced Settings to adjust font spacing or choose a larger font size so the chemical equations, reaction labels, and coefficient options are easier to read. You can also enable a dyslexia-friendly font or translate the worksheet into another language when those options support access to the reaction-classification and balancing tasks.
Wayground offers a comprehensive collection of free printable worksheets and practice problems across subjects, with downloadable PDFs and answer keys to help students build essential skills and concepts. Browse more resources at https://wayground.com/en-us/worksheets.
