A) They turn blue litmus paper red. B) They do not react with metals. C) They taste bitter. D) They turn red litmus paper blue.
A) salt and water. B) acid and a base. C) acid and a metal. D) base and a salt.
A) only for reactions that take place in closed systems. B) for reactions in both open and closed systems. C) only for reactions that take place in open systems. D) for no reactions at all.
A) the pH level of the solution would be between 3 and 11 B) the pH level of the folution would be less than 3 C) the substances would not mix, and you could still take two different pH readings D) the pH level of the solution would be more than 12
A) The lemon has a lower pH than the apple. B) The apple has a lower pH than the lemon. C) The lemon has a higher pH than the apple. D) The apple and lemon have the same pH level.
A) Matter is not changed. B) Matter is not created or destroyed. C) The total mass of the reactants if greater than the total mass of the products. D) The total mass of the reactants is less than the total mass of the products.
A) Phase Change-chemical change B) Endothermic reaction-physical change C) Exothermic reaction-physical change D) Phase Change-physical change
A) endothermic reaction-chemical change B) exothermic reaction-physical change C) Exothermic reaction-chemical change D) endothermic reaction-physical change
A) has a long narrow shape with a smooth texture B) does not burn when a flame is applied C) rusts D) reacts with hydrochloric acid to release hydrogen gas
A) a tree burning after a lightning strike B) steam rising from pavement C) a tree branch breaking D) water freezing in a pond
A) electromagnetic change B) physical change C) color change D) chemical change
A) unrelated to the total mass of the products. B) greater than the total mass of the products. C) exactly equal to the total mass of the products. D) less than the total mass of the products.
A) mass change. B) precipitate. C) a change in color. D) shape change.
A) has a pH above 7 and tastes sour. B) has a pH above 7 and tastes bitter. C) has pH lower than 7 and taste sour. D) turns red litmus paper blue.
A) It is most effective in a slightly basic environment. B) It is most effective in a highly basic environment. C) Is it most effective in a slightly acidic environment. D) It is most effective in a highly acidic environment.
A) reactivity B) the ability to reflect light C) conductivity D) melting point
A) melting B) corroding C) burning D) rusting
A) frying an egg B) ice melting C) coal burning D) water turning into steam
A) boiling water B) melting ice C) toasting a marshmallow D) breaking a toothpick in half
A) an atom B) an electron C) a mixture D) a compound
A) The chemical reaction destroyed matter. B) The chemical reaction did not work as expected because it took place in a closed system. C) The chemical reaction created matter. D) Not all of the products and reactants could be measured because the chemical reaction took place in an open system.
A) energy is being absorbed by the reaction. B) matter is being released. C) an exothermic reaction is occuring. D) no reaction is taking place.
A) B B) C C) D D) A
A) a mixture B) a compound C) an electron D) an atom
A) Sodium loses one electron and chlorine gains one electron. B) Sodium loses seven electrons and chlorine gains seven electrons. C) Sodium gains seven electrons and chlorine loses seven electrons. D) Sodium gains one electron and chlorine loses on electron.
A) It is a solution because the ingredients cannot be separated. B) It is a new chemical compound because a physical change took place. C) It is a mixture because each ingredient kept its original properties. D) It is a new element because a chemical change took place.
A) Citrus Fruit (pH 2-3) B) Water (pH 6-7) C) Baking Soda (pH 8-9) D) Dairy (pH 5-7)
A) a solute. B) a reactant. C) a product. D) a solvent.
A) very basic. B) negatively charged. C) very acidic. D) positively charged.
A) cheddar cheese B) green beans C) apples D) ham
A) a solute. B) a solvent. C) a suspension. D) a mixture.
A) litmus paper B) acid C) indicator D) base
A) True B) False
A) Chemical change because a precipitate formed. B) Chemical change because the mass stayed the same. C) Physical change because a precipitate formed.. D) Physical change because a new substance formed.
A) True B) False |