What is a chemical change ?, A change that makes a substance smaller, A change that produces one or more new substances, A change in size or shape only, A change that keeps all properties the same, Which of the following is evidence of a chemical change?, Melting ice, Cutting paper, A new smell or color appears, Breaking a pencil, When charcoal burns, what new substances form?, Only smaller pieces of charcoal, Water and sugar, Ashes and gases, Salt and vinegar, What law states that mass stays the same before and after a chemical change?, Law of Gravity, Law of Chemical Reactions, Law of Conservation of Matter, Law of Energy, Mixing substances A and B caused a color change. What does this most likely show?, A physical change, A chemical change, No change at all, Only a temperature change, What happens to particles during a chemical change?, They disappear, They melt, They rearrange to form new substances, They turn into energy, When charcoal is broken into smaller pieces, what kind of change is this?, Chemical, Physical, Conservation, Heating, Which of the following is NOT evidence of a chemical change?, Gas bubbles, Change in color, Change in shape, Formation of a solid, What forms when iron reacts with oxygen?, Rust, Iron gas, Water, Steel, What happens to the mass of the water and air in the seed experiment as the plant grows?, They increase, They disappear, They remain the same, They decrease, When making cheese, curds form when milk is mixed with:, Water, Vinegar, Lemon juice, Oil, What type of change happens when a chef kneads curds to make mozzarella?, Chemical, Physical, Evaporation, Reaction, What does a mixture allow components to do?, Disappear, B. Change chemically, Keep their own properties, D. Multiply, What is a solution?, A solid only, A type of mixture where substances dissolve, A chemical reaction, A type of gas, Which of the following slows dissolving in water?, Stirring, Heating, Using smaller pieces, Colder temperature.
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CHEMICAL CHANGES
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Adelguirguis68
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