Molecules All Around

What is this called? Molecules tend to slowly spread apart over time..

Concentration Gradient

Objectives SWBAT define diffusion and osmosis.

SWBAT identify if a cell is in a hypotonic, hypertonic, or isotonic solution.

SWBAT give examples of diffusion and osmosis in real-life scenarios.

Exploration

Tap water Salt water Distilled water

Directions First, complete your Hypothesis.

Get signature from teacher.

Obtain materials

Measure bears or carrots.

Place one in each water solution, wait 15 min.

Measure again and observe changes.

Explanation Let’s share our findings…

Osmosis

Quiz Time

Good Luck!1. When the concentration  of solutes outside the cell is greater than inside the cell the solution is said to bea.     hypotonic.b.     hypertonic.c.      isotonic.d.     saturated.

2. Movement of water through a cell membrane, rather than solute, is called

A. Simple Diffusion

B. Solvent Diffusion

C. Osmosis

Ok now that we have done an activity on diffusion and we know what it means let’s apply it to real life scenarios.

Gatorade vs. Water

If a shipwrecked crew drank seawater, they could die. Why?

Why do grocery stores spray their fresh produce with water?

Why is diffusion important in real life?

Objectives SWBAT define diffusion and osmosis.

SWBAT identify if a cell is in a hypotonic, hypertonic, or isotonic solution.

SWBAT give examples of diffusion and osmosis in real-life scenarios.

No talking Independent Make sure to write your name on top GOOD LUCK!