Chemical Reactions

Which of the following is NOT a chemical reaction?

• A bicycle getting rusty

• Cooking hamburgers

• Starting a fire

• Dissolving sugar

Which of the following is a characteristic of a chemical reaction?

• Releases light or gas

• Grows bigger or smaller

• Changes mass

• Turns upside down

Select ALL the ways you know that calcium chloride, baking soda, and water make a chemical reaction.

• It fizzes

• It mixes

• It gets warm

• The baking soda is white

Which food do you need to use a chemical reaction to make?

• Cereal and milk

• Frozen popsicles

• Chocolate chip cookies

• Bread and butter

Can chemical reactions be undone?

• Yes

• No

• Not usually, but sometimes using other chemical reactions.

Place an old, tarnished copper penny in vinegar. You will know that a chemical reaction is taking place because...

• The penny changes from dull to bright and shiny.

• The penny gets really hot.

• The penny smelled like freshly baked cinnamon rolls.

• The penny fizzes

Which of the following is NOT a characteristic of a chemical reaction?

• The temperature changes

• The shape changes

• The color changes

• The smell changes

Which of the following is NOT a chemical reaction?

• Striking a match

• Lighting a candle

• Breaking a branch on a tree

• Boiling pasta for dinner

What is a characteristic of a good hypothesis?

• It is a wild guess

• It is based on evidence

• It is completed after the experiment

• It only uses information you find in books or on the internet

Why is it important that your procedure section be clear? Choose TWO

• So that others can repeat your experiment and get the same results.

• So that you can make sure your hypothesis is correct.

• So that you show the steps you took to answer your research question.

• So you can write a good conclusion and get an 'A' on your paper.