catalyst
Prononciation : [ˈkætəlɪst]
Mot
Contexte : « science »
(noun) a substance that helps a chemical reaction happen faster without being used up. It’s like when you add something to a recipe to make it cook better, but it doesn’t change itself.
Exemple
The enzyme acted as a catalyst, speeding up the reaction in the lab.
Exemple
Without the catalyst, the reaction took much longer and wasn’t as effective.
Exemple
What catalyst did you use to make the reaction go faster?
Contexte : « change »
(noun) something that causes change or helps something important happen. It’s like a friend encouraging you to try something new or exciting.
Exemple
The community event was a catalyst for many positive changes in the neighborhood.
Exemple
Without a catalyst, the project failed to inspire any improvements.
Exemple
What events can be a catalyst for change in your life?
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