Students participate in a lab experiment to observe and measure the opening and closing of stomata. They focus on photoperiod, locate and identify stomata on a leaf and explain the role of stomata in the daily functioning of a plant.

Have a go at this exercise in thinking by asking thinkers to think about thinking, of what they think of, and what they think about. The worksheets in the packet provide much food for thought.

Students participate in an experiment to show how germs are spread, by food, fingers and feces. They conduct a bacteria count using a colony counter.