What does not necessarily indicate a chemical reaction has occurred?
Identifying Chemical Reactions: Observable Signs and Indicators
Interactive Video
•
Physics, Science, Chemistry
•
1st - 6th Grade
•
Hard
Quizizz Content
FREE Resource
The video tutorial explains how to identify chemical reactions through observable signs such as color change, odor emission, gas production, and precipitate formation. It uses the example of baking cookies to illustrate these concepts and contrasts them with physical changes like mixing ingredients. The tutorial concludes with a review and questions to reinforce learning.
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5 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Production of a gas
Emission of an odor
A change in color
A change in physical state
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a sign that a chemical reaction has taken place?
All of the above
Production of a gas
Emission of odor
A change in color
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What might the presence of bubbles indicate during a chemical reaction?
A solid is forming
A gas is being produced
A color change is occurring
A liquid is evaporating
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is an insoluble solid that forms from a chemical reaction in a liquid?
A mixture
A solution
A precipitate
A suspension
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is an example of a precipitate in everyday life?
Sugar in tea
Soap scum
Baking soda
Salt in water
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