Biology IA - Investigation of the relationship between surface area and volume using different volume agar cube lab report

The first 200 words of this essay...

Biology HL

Candidate name: Ieva Drulyte

Date: ___________________

Investigation of the relationship between surface area and volume using different

volume cubes of agar being put into sodium hydroxide solution

D, DCP, CE

Design

Aim: to investigate how the distance diffused by solution to agar cubes depends on cubes surface area and volume ratio.

Hypothesis: bigger surface area and volume ratio of agar cubes approaches the result of the entire agar cube being diffused.

Variables: the distance diffused by NaOH solution into the agar cube (dependent variable) will be measured by manipulating the size of agar cube (independent variable). The controlled variables are as follows:

Contolled variable

Units

Effect

Method to keep it constant

Time

Min

Would

alter

the

rate of diffusion

Accurate chronometer will be used

Temperature

°C

Experiment will take place at the same classroom

Amount of NaOH

mL

Agar cubes will be put in the excess of NaOH

Concentration of NaOH

%

The same solution will be used in all trials

Concentration of agar cubes

%