Conservation of Mass Worksheet
Explore the principle of conservation of mass through various questions and scenarios for Grade 8 science.
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Conservation of Mass: Grade 8 Science
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Read each question carefully and answer to the best of your ability. Show all work for calculations.
1. Which of the following statements best describes the Law of Conservation of Mass?
Mass can be created or destroyed during a chemical reaction.
The total mass of reactants is always less than the total mass of products.
The total mass of reactants equals the total mass of products in a closed system.
Mass is only conserved during physical changes, not chemical changes.
2. If 10 grams of hydrogen react completely with 80 grams of oxygen to form water, what will be the mass of the water produced?
70 grams
90 grams
100 grams
Cannot be determined
3. The Law of Conservation of Mass states that mass cannot be or in an isolated system.
4. During a chemical reaction, atoms are rearranged, but the total number of atoms of each element remains .
5. When ice melts into water, its mass decreases because it changes state.
True
False
6. If a piece of wood burns and turns into ash and smoke, the total mass of the ash and smoke will be less than the original mass of the wood.
True
False
7. Explain why the Law of Conservation of Mass is important in understanding chemical reactions.
8. Describe an experiment that could demonstrate the Law of Conservation of Mass. Be sure to mention the reactants, products, and how you would measure mass.