Chemical Changes vs Physical Changes Quiz

Chemical bond = A force that binds atoms together Chemical change = Results in new substances with different chemical properties Physical change = Alters physical properties without forming new substances Mixture = A combination of two or more substances that can be separated

Change in color = May indicate a chemical change Release of gases = May indicate a chemical change Release of heat or light = May indicate a chemical change Change in color when food coloring is added to water = Does not indicate a chemical change

Coal burning and forming carbon dioxide = Chemical change Color change due to mixing food coloring with water = Physical change Evaporation or distillation separating substances in a mixture = Physical change Burning wood to produce ash = Chemical change

<p>Atoms bonding to form new molecules = Chemical bond New substances formed that differ in properties from original substances = Chemical change Mixture where components can be separated by physical means = Mixture Change in properties without forming new substances = Physical change</p> Signup and view all the answers

<p>Chemical changes = Part of our daily life, enabling bodily functions and changing the color of tree leaves Chemical reaction = Consists of reactants and products, indicating the formation of new substances Arrow in chemical equation = Separates reacting substances from resulting substances Law of conservation of mass = States that matter is neither destroyed nor created during a chemical reaction</p> Signup and view all the answers

<p>Hydrogen to oxygen in water (H2O) = 2:1 Carbon (C) atoms to hydrogen (H) atoms in methane (CH4) = 1:4 Sodium (Na) atoms to water (H2O) molecules in sodium hydroxide (NaOH) = 2:2 Oxygen (O) atoms in carbon dioxide (CO2) = 2</p> Signup and view all the answers

<p>Baking dough = Chemical change Frying eggs = Chemical change Digesting food = Chemical change Styling hair = Physical change</p> Signup and view all the answers

<p>Law of conservation of mass = Matter is transformed from one form to another during a chemical reaction Balanced chemical equation = All atoms present before and after the reaction, following the law of conservation of mass New substances in chemical reactions = Atoms rearranged and bonded differently from reactants Reactivity series = Order of metals based on their reactivity with other elements</p> Signup and view all the answers