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PBS - Physical Vs. Chemical Changes Video Analysis
By Neil Hess
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Last updated 3 months ago
11 questions
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Use the video at the link below to help you answer the following questions:
https://www.pbs.org/video/physical-vs-chemical-changes-36309/
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Question 11
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The ice, water and boiling water were examples of _____________ changes.
Chemical Changes
Physical changes
True or false: When the liquid water was becoming steam, a new substance was being made.
True
False
True or false: The cracker being crushed by the bowling ball was so powerful that a chemical change happened.
True
False
True or false: A physical change is when you have a different product (cracker squares, cracker powder) but the substance is the same.
True
False
When the vinegar and baking soda was in the plastic bag, one clue that a chemical change was happening is that ______________
the bag was hot
the bag was clear
the bag was cold
Which of these was NOT a sign of a chemical change in the baking soda and vinegar example?
It was in the liquid state
A gas was being made
The bag changed temperatures
When vinegar was combined with the calcium chloride, the bag _____________________.
became cold
melted
became hot
An endothermic reaction ___________ heat. An exothermic reaction ______________ heat.
takes in, takes in
takes in, puts out
puts out, puts out
puts out, takes in
The chemical change that occurred when vinegar was mixed with milk produced __________________.
cottage cheese
milk plastic
yougart
True or false: The smoke that was produced from the magnesium is just like the smoke that is produced in a normal campfire.
True
False
The final demonstration of a chemical change was when the two substances were stirred around in a beaker and the substance __________________
changed color
shattered the container it was in
disappeared