Understanding Physical and Chemical Properties and Changes

Physical and Chemical Properties and Changes Answers blue color physical density physical flammability (burns) chemical solubility (dissolves) physical reacts with acid chemical supports combustion chemical sour taste physical melting point physical reacts with water chemical hardness physical boiling point physical luster physical odor physical reacts with air chemical NaCl (table salt) dissolves in water physical Ag (silver) tarnishes chemical an apple is cut physical heat changes H2O to steam physical baking soda reacts with vinegar chemical Fe (iron) rusts chemical alcohol evaporates physical ice melts physical milk sours chemical sugar dissolves in water physical wood rots chemical pancakes cook chemical grass grows chemical a tire is inflated physical food is digested chemical paper towel absorbs water physical An ice cube is placed in the sun. Later there is a puddle of water. Later still the puddle is gone. physical Two chemicals are mixed together and a gas is produced chemical A bicycle changes color as it rusts. chemical A solid is crushed to a powder. physical Two substances are mixed and light is produced. chemical A piece of ice melts and reacts with sodium. chemical Mixing salt and pepper. physical Chocolate syrup is dissolved in milk. physical A marshmallow is toasted over a campfire. chemical A marshmallow is cut in half. physical Scenario 1 chemical and physical; bread is hot, bread changes size Scenario 2 chemical; bread turns black Scenario 3 chemical; changes color 1/2 Scenario 4 physical; dry hair Scenario 5 chemical and physical; creates bubbles, CO2 expands in size Scenario 6 chemical; color change Scenario 7 physical; shape change Scenario 8 physical; color change Scenario 9 physical and chemical; size changes, hormone (chemical) reaction Scenario 10 chemical; change of natural state Changing the size and shapes of pieces of wood would be a chemical change. false In a physical change, the makeup of matter is changed. false Evaporation occurs when the liquid water changes into a gas. true Evaporation is a physical change. true Burning wood is a physical change. false Combining hydrogen and oxygen to make water is a physical change. false Breaking up concrete is a physical change. true Sand being washed out to sea from the beach is a chemical change. false When ice cream melts, a chemical change occurs. false Acid rain damaging a marble statue is a physical change. false. 2/2