

Conservation of Mass
Presentation
•
Science
•
6th - 8th Grade
•
Practice Problem
•
Easy
Standards-aligned
Tiffany Combs
Used 5+ times
FREE Resource
16 Slides • 4 Questions
1
2
Launch Question
3
Multiple Choice
Which student claim best describes what is happening to the mass of the system when the chemical reaction occurs in the model?
Susan: "The mass of the system will decrease, because ash is smaller in size than the logs and fire."
Lisa: " The mass of the system will increase, because new atoms are created when the gas forms from the fire."
James: " The mass of the system will remain the same, because matter isn't created or destroyed, only change form in the chemical reaction.
Colton: "The mass of the system will decrease, because the fire destroys atoms."
4
A system is a collection of components that work together as a whole.
Example:
Digestive system
Parts: mouth, stomach, small intestines, large intestines
Function: All work together to break down food
What is a system?
How is this model a system?
5
Matter does not interact with its surroundings.
Matter is contained.
Closed System
Matter interacts with it's surroundings.
Matter can be transferred in and out.
Open System
System (Open vs. Closed)
6
7
Open vs Closed System?
8
9
Midpoint Checkpoint
10
Multiple Choice
Which student claim best describes what is happening to the mass of the system when the chemical reaction occurs in the model?
Susan: "The mass of the system will decrease, because ash is smaller in size than the logs and fire."
Lisa: " The mass of the system will increase, because new atoms are created when the gas forms from the fire."
James: " The mass of the system will remain the same, because matter isn't created or destroyed, only change form in the chemical reaction.
Colton: "The mass of the system will decrease, because the fire destroys atoms."
11
Open Ended
What evidence supports the claim that you picked in the previous question?
12
13
14
15
16
17
18
End of Lesson Checkpoint
Success Criteria:
I can use a model to describe the law of conservation of matter.
I can calculate the total mass of a chemical reaction.
19
Multiple Choice
Does this model of a chemical reaction support the Law of Conservation of Mass?
Yes
No
20
Evidence
On the paper given to you mathematically show your evidence to support your claim to the previous question.
Show answer
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