LD-50 Lab

Collaborators: Alex King, Micaela Strickland, Habiba

Introduction: Everyday we handle toxic materials but we don't know just how toxic some of them are. LD-50 is the term used to describe acute ingestion toxicity. Ld means lethal dose and the 50 means that a certain dosage is lethal for 50% of a group. 

Problem: How much salt is too much for radishes to grow and how much is not enough?

Hypothesis: If different concentrations of salt solution are used to grow radish seeds, then the growth of the radish seeds will vary according to concentration.

Parts of the Experiment:

Control group: No salt, test tube 6

Experimental group: test tubes 1-5, 12, 6, 3, 1.5, .75

Independent Variable: concentrations of salt solution

Dependent Variable: growth of radish seeds

Controllled variable: growth of control radish seeds

Materials: * see lab protocol #1-#3

Procedures: * see lab protocol #1-#3

Data:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Data Analysis: The data for all the groups were relative of each other, never disparing too much.

Conclusion: The data shows that too mcuh salt is detrimental for the growth of radish seeds and too little isn't the best either.

Citations: "Common Menu Bar Links." What Is a LD50 and LC50? : OSH Answers. N.p., n.d. Web. 24 Sept. 2014.