1) Which of the following are physical changes?
(a) Ice melts to form water.
(b) Wood burns.
(c) Bleach changes the color of your shirt.
(d) Sugar dissolves in water.
(e) Sodium combines with water to form sodium hydroxide.
2) Which of the following are physical changes?
(a) Dry ice sublimates into gaseous carbon dioxide.
(b) Salt dissolves in water.
(c) Gasoline burns.
(d) Food is digested.
(e) Sugar caramelizes.
3) Which of the following are chemical changes?
(a) Water boils to form steam.
(b) An antacid neutralizes stomach acid.
(c) A crystal is shattered.
(d) Potassium chloride dissolves in water.
(e) An iron fence rusts.
4) Which of the following are chemical changes?
(a) Water condenses on the side of a glass.
(b) Wax melts.
(c) A candle burns.
(d) A crystal of NaCl forms in a glass of salt water.
(e) A white coating forms on a newly cut piece of sodium.
5) Which of the following are chemical changes?
(a) Ice melts to form water.
(b) Wood burns.
(c) Bleach changes the color of your shirt.
(d) Sugar dissolves in water.
(e) Iron is melted and poured into a mold.
6) Which of the following are chemical changes?
(a) Dry ice sublimates into gaseous carbon dioxide.
(b) Salt dissolves in water.
(c) Gasoline burns.
(d) Food is digested.
(e) Steam rises from a cup of tea.
7) Which of the following are physical changes?
(a) Water boils to form steam.
(b) An antacid neutralizes stomach acid.
(c) A crystal is shattered.
(d) An egg is cooked.
(e) An iron fence rusts.
8) Which of the following are physical changes?
(a) Water condenses on the side of a glass.
(b) Wax melts.
(c) A candle burns.
(d) Sodium and chlorine combine to form NaCl.
(e) A white coating forms on a newly cut piece of sodium.
9) Which of the following are physical changes?
(a) A block of salt is ground to a powder.
(b) Bread bakes.
(c) Baking soda and vinegar are mixed producing a lot of bubbles.
(d) Ice cream melts.
(e) Carbonic acid decomposes.
10) Which of the following are chemical changes?
(a) A block of salt is ground to a powder.
(b) Bread bakes.
(c) Vinegar is poured into water.
(d) Ice cream melts.
(e) Carbonic acid decomposes.