Publication No. 10249
Student Laboratory Kit
Materials Included In Kit
Gelatin, 1 g
Additional Materials Required
Hydrochloric acid solution is corrosive to skin and eyes and toxic by ingestion or inhalation. Dispense the HCl very carefully and have students wear chemical splash goggles, chemical-resistant gloves and a chemical-resistant apron. Please review current Safety Data Sheets for additional safety, handling and disposal information.
Please consult your current Flinn Scientific Catalog/Reference Manual for general guidelines and specific procedures, and review all federal, state and local regulations that may apply, before proceeding. Solutions from this lab can be disposed of according to Flinn Suggested Disposal Method #26b.
Correlation to Next Generation Science Standards (NGSS)†
Science & Engineering PracticesAsking questions and defining problems
Developing and using models
Planning and carrying out investigations
Analyzing and interpreting data
Engaging in argument from evidence
Obtaining, evaluation, and communicating information
Disciplinary Core IdeasMS-PS1.B: Chemical Reactions
MS-LS1.B: Growth and Development of Organisms
MS-LS1.D: Information Processing
HS-PS1.B: Chemical Reactions
HS-LS4.A: Evidence of Common Ancestry and Diversity
Crosscutting ConceptsSystems and system models
Scale, proportion, and quantity
MS-PS1-2. Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.
Answers to Questions
(Draw sketches of your observations. Label each drawing.)
Observations will vary.
These materials could easily be found in ancient oceans after polymerizing from simpler building blocks.
Answers will vary but they usually form in pH range from 3–5, which would be like conditions predicted for ancient oceans.
Since sugars serve as energy sources for most living animals, the ability to digest starch into sugars might be an important first step in digestion.
Methylene blue seems to accumulate at the inner surfaces of the coacervates much like the inside of the membrane in living cells.
Scientists and philosophers have long pondered the origin of life on Earth. Scientists have found that under prescribed conditions, proteins and other chemical materials can aggregate into forms with an organization resembling simple forms of life such as bacteria. In this activity, these organized droplets, called coacervates, will be observed.
Records show that very early people believed in abiogenesis (often called spontaneous generation). Abiogenesis beliefs held that life could originate spontaneously from non-living matter. It was believed, for example, that frogs came from mud and maggots came from meat. The later controlled experiments of Redi (middle of 17th century) and Pasteur (middle of 18th century) disproved these anciently held beliefs and cast doubt on the concept of abiogenesis.
Gelatin solution, 1%, 5 mL
Hydrochloric acid solution is corrosive to skin and eyes and toxic by ingestion or inhalation. Dispense the HCl very carefully and wear chemical splash goggles, chemical-resistant gloves and a chemical-resistant apron. Wash hands thoroughly with soap and water before leaving the laboratory.
Caution: Dispense hydrochloric acid very carefully. It is corrosive to skin and eyes, toxic by ingestion or inhalation and will damage clothing and other materials.
Student Worksheet PDF