1) Folding paper is an example of a: a) chemical change. b) physical change. 2) Digesting a slice of pizza is an example of a: a) chemical change. b) physical change. 3) Burning a candle is an example of a: a) chemical change. b) physical change. 4) Folding a blanket is an example of a: a) chemical change. b) physical change. 5) An apple rotting on a tree branch is an example of a: a) chemical change. b) physical change. 6) True or false? A piece of bread turning brown in a toaster is evidence of a chemical change. a) True b) False 7) True or false? Old milk smelling sour is evidence of a chemical change. a) True b) False 8) True or false? A cake smelling delicious as it bakes in the oven is evidence of a chemical change. a) True b) False 9) True or false? Adding color to a coloring page is evidence of a chemical change. a) True b) False 10) True or false? A glow stick giving of light after snapping it is evidence of a chemical change. a) True b) False 11) True or false? A change in size due to folding a piece of paper is evidence of a chemical change. a) True b) False 12) Here is a chemical equation. Which side of the equation is the reactant side?   Li + F → LiF a) Li + F b) LiF 13) Here is a chemical equation. Which side of the equation is the product side?   Li + Cl → LiCl a) Li + Cl b) LiCl 14) Here is an example of a compound. How many elements are present in this compound? H2SO4 a) 7 b) 6 c) 3 d) 1 15) Here is an example of a compound. How many atoms are in this compound? H2SO4 a) 7 b) 6 c) 3 d) 1 16) Here is an example of a chemical reaction. Is it balanced or unbalanced? MnS + HCl → H2S + MnCl2 a) Balanced b) Unbalanced 17) How do you pronounce this symbol (→) found in a written chemical reaction? a) makes b) creates c) describes d) yields 18) The 2 in the chemical formula 3H2O is a: a) coefficient. b) subscript. c) prefix. d) suffix. 19) The 3 in the chemical formula 3H2O is a: a) coefficient. b) subscript. c) prefix. d) suffix. 20) How many hydrogen atoms are present in the chemical formula 3H2O is a: a) 6 b) 2 c) 1 d) 5 21) This model represents which type of chemical reaction? a) Synthesis b) Double Replacement c) Decomposition d) Single Replacement 22) This model represents which type of chemical reaction? a) Synthesis b) Double Replacement c) Decomposition d) Single Replacement 23) This model represents which type of chemical reaction? a) Synthesis b) Double Replacement c) Decomposition d) Single Replacement 24) This model represents which type of chemical reaction? a) Synthesis b) Double Replacement c) Decomposition d) Single Replacement 25) This Model represent SO4 (sulfur dioxide). a) True b) False 26) This model represents H2SO4 (sulfuric acid). a) True b) False

Chemical Reactions Baseline!

szerző:
Beágyazás

Ranglista

Vizuális stílus

Beállítások

Kapcsoló sablon

Automatikus mentés visszaállítása :?