I made 39 different pieces of clip art using ppt. These images are in png format. I made them using the drawing tools on ppt and some imagination. The pictures contain the following topics:
1. The cell membrane
2. Types of Passive Transport
3. Passive Transport
4. Active Transport
5. Movement of solute particles across the cell membrane over time
6. Concentration gradients
7. Solutions, and
I spent hours making these, and I used them in my own ppt slides. I did it so I wouldn't have to worry about copyright issues. I really hope you enjoy them, and if you like them please tell me. I will make more clip art for different science topics if there is an interest in this type of resource.
The best part is you can use them for different assessments, EVERY school year, Over and over again.