Chemical Reactions Review

Ms. Olson makes hot chocolate with 20 grams of sugar and Mr. Ward makes hot chocolate with 10 grams of sugar. Which is correct?

• Ms. Olson and Mr. Ward's hot chocolate will be equally sweet.

• Ms. Olson's hot chocolate will be more sweet.

• Mr. Ward's hot chocolate will be more sweet.

• There's not enough information to know whose will be sweeter.

Ms. Olson makes hot chocolate with 20 grams of sugar and Mr. Ward makes hot chocolate with 10 grams of sugar. Which is correct?

• Ms. Olson's hot chocolate will weigh more because it has more sugar.

• Mr. Ward's hot chocolate will weigh more because it has less sugar.

• Both hot chocolates will be the exact same.

Ms. Olson has shiny new pennies after dipping them into a salt and vinegar solution. Which statement is correct about her pennies and salt and vinegar solution?

• The solution will weigh less after the experiment.

• The pennies will weigh more after the experiment.

• The pennies will weigh less after the experiment.

• The salt and vinegar will weigh more after the experiment.

What happens when you combine baking soda and vinegar in a seal plastic bag?

• The bag may explode.

• There is no reaction.

• Invisible particles fill and expand the bag.

A chemical reaction makes a new substance.

• True

• False

Baking ________ bubbles and fizzes in vinegar, not water.

• Powder

• Soda

Baking _______ bubbles and fizzes with water and vinegar.

• Soda

• Powder