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Sodium Alginate Respiration—Student Laboratory Kit

Pam Bryer, Bowdoin College, Brunswick, ME

Item #: FB2124 

Price: $68.75

In Stock.

Use spherification to make yeast spheres using sodium alginate! Measure the rate of respiration under various conditions.

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Product Details

Use this compelling method to quantify the rate of respiration! With spherification, the process of trapping a liquid inside a gelatinous sphere, students make their own yeast spheres. Students will be completely engaged as they see their slurry of yeast coalesce into perfect spheres. Expose the spheres to different conditions and measure the metabolism of the yeast inside. These spheres are permeable to gases, making them great for further inquiry investigations. This method makes it easy to control the amount of yeast in the system so that trials can be compared. Complete for 30 students working in pairs.


Materials Included in Kit: 
Bromthymol blue solution, 0.04%, 50 mL
Calcium chloride solution, 0.3 M, 500 mL
Sodium alginate, 10 g
Sucrose, 40 g
Yeast, single package
Cheesecloth, 1 sq. yd
Dishes, weighing, 1.5 g, 3½" x 3½" x 1", 30
Pipet, Beral-type, Extra large bulb, 15
Syringe, disposable, 20 mL, 15
Water sample tubes with caps, 30

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Developing and using models
Constructing explanations and designing solutions
Analyzing and interpreting data
Obtaining, evaluation, and communicating information

Disciplinary Core Ideas

MS-LS1.C: Organization for Matter and Energy Flow in Organisms
MS-PS3.D: Energy in Chemical Processes and Everyday Life
HS-LS1.C: Organization for Matter and Energy Flow in Organisms
HS-LS2.B: Cycle of Matter and Energy Transfer in Ecosystems
HS-PS3.D: Energy in Chemical Processes

Crosscutting Concepts

Cause and effect
Structure and function
Energy and matter
Systems and system models

Performance Expectations

MS-LS1-6: Construct a scientific explanation based on evidence for the role of photosynthesis in the cycling of matter and flow of energy into and out of organisms.
MS-LS1-7: Develop a model to describe how food is rearranged through chemical reactions forming new molecules that support growth and/or release energy as this matter moves through an organism
HS-LS1-6: Construct and revise an explanation based on evidence for how carbon, hydrogen, and oxygen from sugar molecules may combine with other elements to form amino acids and/or other large carbon-based molecules.
HS-LS1-7: Use a model to illustrate that cellular respiration is a chemical process whereby the bonds of food molecules and oxygen molecules are broken and the bonds in new compounds are formed, resulting in a net transfer of energy.
HS-LS2-3: Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions.