Feb. 11 – Viewing of Cells

Today I asked these review questions...

What is diffusion?

A)   Movement of particles in water

B)   Movement of particles in air

C)   Movement of water across a membrane.

D)   Mixing balls in a ball pit.

If there is more particles OUTSIDE the cell.  The situation is called…

A)   Hypertonic

B)   Hypotonic

C)   Isotonic

D)   Salty!

You see a cell shrivel up when it is put in water.  What can you say about the particles in the water?

A)   There are more particles in the water than the cell.

B)   There are fewer particles in the water than the cell.

C)   There is the same number of particles in the water as the cell.

D)   It is impossible to know.

Which carrot should be lighter?

A)   Carrot A

B)   Carrot B

C)   Both the same.

D)   Not sure.

Do you know the correct answers?

We also did an update on the osmosis experiment with the carrots.

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Osmosis demonstration

                       Day 1               Day 2           Day3

Carrot A:       7.23 g                  7.33 g

Carrot B:       7.41 g                 6.39 g

(salt)

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Thats a big difference!

Here's a similar experiment using eggs.

Next we looked at slides of actual cells using microviewers and answered some questions about them.

Handout: Cell Structures Microviewer Questions

Homework

If you have not completed the Diffusion worksheet from yesterday, please finish it!