1 What is a property of many metals?A) dull appearance B) soft C) shiny appearance D) liquid at room temperature 2 A substance is giving off heat, light, and smoke. Most likely the type of change that is occurring is __________.A) a chemical change B) a physical change C) a nuclear change D) a change of state 3 What is a good sign that a chemical change has occurred?A) the physical properties are the same B) the state of the matter has changed C) the production of heat, light, and smoke D) the substance seems to have disappeared 4 An example of a change of state is __________.A) liquid filling a glass B) exposing photographic film C) ice cubes melting D) paper burning 5 The law of conservation of mass states that matter cannot be __________.A) hidden B) created or destroyed C) burned D) changed 6 Examples of chemical properties include __________.A) length and mass B) flammability and reactivity C) melting point and boiling point D) color and shape 7 What substance does not have the property of ductility?A) copper B) silver C) platinum D) water 8 When iron rusts, it is reacting with __________ in the air.A) nitrogen B) oxygen C) water D) carbon dioxide 9 Why are vitamins often sold in dark brown containers?A) to stop any physical changes inside the bottle B) to promote chemical changes in the vitamins C) to prevent the vitamins from going through a chemical change from exposure to light D) to make the vitamins more powerful 10 Which of these can be broken down by electricity?A) sugar B) water C) vitamins D) limestone 11 What are the four states of matter?A) solid, liquid, gas, and plasma B) color, shape, size, and density C) solid, liquid, vacuum, and plasma D) heat, temperature, length, and mass 12 A change in the chemical properties of a substance results in a __________.A) fire B) a change of state C) the same substance D) new substance 13 What are the two senses you should use to observe materials in a laboratory?A) seeing and hearing B) touching and smelling C) touching and hearing D) seeing and tasting 14 A substance has gone through a chemical change. Most likely, the resulting substance __________.A) has been created B) has new physical properties C) is the same as the old substance D) is a gas 15 Which state of matter does not occur at room temperature?A) gas B) liquid C) solid D) plasma 16 Can mass be created or lost in a chemical change?A) sometimes B) no C) it has not yet been determined D) yes 17 Where does all the mass of wood in a fire go after the fire burns itself out?A) It changes state. B) It turns into smoke and ash. C) It disappears. D) It turns into plasma and remains that way. 18 An example of a chemical change is __________.A) boiling B) melting C) freezing D) burning 19 Why does a liquid fill the shape of a container?A) because the particles of the liquid are constantly moving B) because the matter has changed state C) because this is a chemical property D) because the particles do not move 20 What is a physical property of water?A) not flammable B) reacts with sodium C) liquid at room temperature D) pH of 7