Lab. Unit 1

Background

What is  meant by diffusion?

What is meant by osmosis?

Indicate with an arrow the net flow of water

Hypothesis

EXPERIMENT

Objectives

Materials

Procedure

Results

Conclusions

1.            In the winter, grass often dies near the roads that have been covered in salt to remove the ice. What do you think is the reason the grass dies?

2.            Define the following: isotonic, hypertonic, and hypotonic solution.

3.            How do animal cells and plant cells react in a hypotonic solution?

4.            These red blood cells were placed in three different solutions:  isotonic, hypertonic, and hypotonic. Say which image corresponds to each solution.