|Type of Product:||Journal Article
based on 1 review
|Publication Title:||Science Scope
|Grade Level:||Middle School
Over the years, many interesting chemical reactions and activities have been used to illustrate the conservation of mass. The reaction of baking soda and vinegar is a common example. The experimental procedure described in this article presents a special case involving buoyancy where the buoyancy effect is exacerbated by the fact that the reaction container expands as the reaction proceeds and a large volume of air is displaced. The data reported here were gathered at a specific pressure and temperature using a certain type of balloon. Specific values will depend on temperature, barometric pressure, humidity, type of balloon, and the amounts of vinegar and baking soda. However, the relationship among variables should remain the same.
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Conservation of mass
Scientific habits of mind
|Intended User Role:||Curriculum Supervisor, Middle-Level Educator, Teacher
|Educational Issues:||Classroom management, Curriculum, Educational research, Inquiry learning, Instructional materials, Teacher preparation, Teaching strategies
|Requirements:||Requires Adobe Acrobat Reader
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National Standards Correlation
This resource has 7 correlations with the National Standards.
- Physical Science
- Properties and changes of properties in matter
- In chemical reactions, the total mass is conserved. (5-8)
- Science as Inquiry
- Abilities necessary to do scientific inquiry
- Use data to construct a reasonable explanation.
- Design and conduct a scientific investigation.
- Use appropriate tools and techniques to gather, analyze, and interpret data.
- Think critically and logically to make the relationships between evidence and explanations.
- Understandings about scientific inquiry
- Types of investigations include describing objects, events, and organisms; classifying them; and doing a fair test (experimenting).
- Teaching Standards
- Teachers of science guide and facilitate learning. In doing this, teachers
- Encourage and model the skills of scientific inquiry, as well as the curiosity, openness to new ideas and data, and skepticism that characterize science.
||Good for teachers to know
||Reviewed by: Tina Harris (Fairmount, IN) on September 28, 2011
||This describes the fact that a buoyancy effect causes one of the labs for conservation of mass to consistently read as less mass than the initial products.
While this is good to know, I know that the materials I have are not sensitive enough to register this and if they did, the students would not understand the explanation for why their data was off. But it IS good to know if using electronic balances so that teachers to not inadvertently count it against students scored that they did not maintain the same mass.
This would actually be a great activity for an advanced high school science class to do - the problem solving and associated research would be good for them to work through.
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