Evidence of Chemical Reactions
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Objective
Identify substance properties that can be used as evidence that a chemical reaction has occurred. Collect and interpret data on the properties of substances before and after interactions. Determine whether chemical reactions have occurred.
Part 1 of 4
Warm-up video
Be Smart · 7:56Vetted channel
We don't generate video — this one is by Be Smart on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.
Part 2 of 4
Key concepts
3 concepts
- 1
The Maillard reaction involves sugars and amino acids reacting at high temperatures to create complex flavor compounds, making food more enjoyable.
- 2
Alloying copper with elements like tin creates bronze, which is harder and more durable than pure copper, marking an important step in metalworking.
- 3
The Haber-Bosch process is used to convert nitrogen and hydrogen into ammonia, which is then used to make fertilizers that have greatly increased food production.
Part 3 of 4
Practice
9 questions
Based on the video, which of the following is NOT a direct indicator of a chemical reaction?
The Maillard reaction, discussed in the video, is responsible for which of the following changes in food?
Part 4 of 4
Exit ticket
Quick comprehension check
“A student mixes two clear liquid solutions in a beaker. Which of the following observations would be the BEST evidence that a chemical reaction has occurred? a) The beaker feels slightly warmer to the touch. b) The combined solution is clear. c) A solid substance forms and settles to the bottom of the beaker. d) The total volume of the solution increases slightly.”
Sample answer included in the free materials
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