Cellular Transport Lab- Biology
Purpose:
Model Diffusion using grapes and different concentrations of sugar.
Define the following terms:
– Diffusion
– Osmosis
– Passive Transport
– Equilibrium
Hypothesis: What is going to happen to the mass of each grape?
1. Part A- Grape Juice?
2. Part B- Water?
3. Part C- Sugar Water?
Procedure:
1. Part Aa. Mass 1 grape
b. Put 25 ml of grape juice in a 25 ml beaker
c. Put the grape in the juice and let it set for ~20 minutes.
2. Part Ba. Mass 1 grape
b. Put 25 ml of water in a 25 ml beaker
c. Put the grape in the water and let it set for ~20 minutes.
3. Part Ca. Mass 1 grape
b. Put 25 ml of concentrated sugar water in a 25 ml beaker
c. Put the grape in the concentrated sugar water and let it set for ~20 minutes.
Data:
Mass Before (g)
Mass After 20 min. (g)
1. Grape Juice
2. Water
3. Sugar Water
Analysis: Answer the following questions. You do not need to use complete sentences.
1. In this lab the grape was supposed to represent a _______________?
2. In this lab we are measuring the movement of _________________.
3. Osmosis is the _____________________of____________________.
4. In part A molecules moved _________ _________the grape (cell).
5. In part B molecules moved _________ _________the grape (cell).
6. In part C molecules moved _________ _________the grape (cell).
5 Step Conclusion: (PHALE) Write your conclusion in complete, grammatically correct sentences.
1. Restate Purpose
2. Address Hypothesis
3. Application to real World
4. What did you learn?
5. Sources of Error