Lesson Balancing equations lessonWorksheet Balancing equations worksheetLab Balancing equations labTest Balancing equations testQuiz Balancing equations quizQuick answer: A chemical equation shows reactants turning into products. This grade 8 science quiz checks balancing equations with 10 multiple-choice questions and instant feedback; every answer comes with a short explanation.
The tests book with mark schemes · Grade 8 science
Every chapter in one PDF school book of 66 pages, to print or keep on your tablet.
See the book This balancing equations quiz for grade 8 science has quick multiple-choice questions with instant feedback. Need a refresher first? Read the lesson or do the worksheet on balancing equations .
Choose the best option for each question. Only one is correct; the others reflect common mistakes about coefficients, subscripts and conservation of mass.
Level: Grade 8 science (Year 9 · Class 8) · Curriculum: MS-PS1-2, MS-PS1-5
In a chemical equation, the substances on the left of the arrow are called What happens to atoms in a chemical reaction? Which equation is balanced? What may be changed to balance an equation? How many oxygen atoms are in 3 O₂? What does (aq) mean in an equation? Why does an open flask lose mass when a gas is made? Balance Al + Cl₂ → AlCl₃. What is the coefficient of Cl₂? If 100 g of CaCO₃ gives 56 g of CaO, what mass of CO₂ forms? Which of these shows a chemical reaction? What are reactants? — Starting substances, left of the arrow. What are products? — New substances, right of the arrow. What happens to atoms in reactions? — They are rearranged, not created or destroyed. What may you change when balancing? — Coefficients only. Balanced hydrogen and oxygen equation? — 2 H₂ + O₂ → 2 H₂O Meaning of (g)? — Gas Meaning of (aq)? — Dissolved in water Mass of reactants vs products? — They are equal in a closed system. Why can an open flask lose mass? — A gas escapes into the air. First step in balancing? — Write the correct formulas. Keep going with Lina
The tests book with mark schemes · Grade 8 science
Every chapter in one PDF school book of 66 pages, to print or keep on your tablet.
See the book 
