Worksheet to accompany Bill Nye’s “Chemical Reactions” Video Directions: As you view the DVD, fill in the blanks in the “knowledge” section. If you need help, use the word bank. If you don’t get them all done during the video, go back after it’s over and fill in all blanks. When you’ve filled in the “knowledge” section, answer the high-level thinking questions on the back of this sheet.
Word Bank: (some words may be used more than once, others not at all)
Atoms Molecules Chemical Carbon Dioxide Combine Oxygen Hydrogen Collide Table Salt Sodium Chlorine 92 Exothermic 116 Endothermic Reacts Metal Copper Barium Strontium Dynamite Salts Element Methane Lithium
Knowledge
Everything is made of .
Iron rusts when it’s combined with .
Water is made by the reaction between and . Burning steel wool was an reaction.
Engines work by combining gasoline and .
Mixing vinegar and baking soda produces .
Pure Sodium vigorously with water.
Another name for Sodium Chloride is . Sodium Chloride is made of and . Fireworks twinkle bright colors when react with oxygen. The yellow color in fireworks is caused by .
The metal gives fireworks there blue color.
Chemical reactions happen when atoms with other atoms. The Periodic Table contains “naturally occurring” elements.
Alfred Nobel is famous for the invention of .
The athletic cold pacs are an example of an reaction.
Directions: These questions are to be answered in a complete, grammatically correct sentence that makes sense and would be readable and understandable by another student.
Comprehension
Explain the difference between an “exothermic” and an “endothermic reaction”. Describe what a “pyrotechnic” does for a living.
Application
Why can the reaction between Vinegar and Baking Soda be used to make a fire extinguisher?
Analysis
Why are the two toxic chemicals; Sodium and Chlorine, made safe when they’re combined as salt?
Synthesis
Predict the compound (by name and formula) that would be formed by combining Strontium metal with Oxygen.
Evaluation
Which profession would be safer; fireman or pyrotechnic? Support your opinion with a minimum of three reasons.