make a practical record with the simple expiement on transpiration
Answers
Answer:
Materials
Three small, thin-leafed plants
Three small, broad-leafed plants
Small watering can
Scale
6 plastic bags large enough to fit completely around each plant pot
Masking tape
Procedure
Get six small plants, three with wide leaves and three with narrow leaves. Use the masking tape and pen to give each one a number.
Water the plants until water comes out of the bottom of the pot. If the plants are really dry when you start, water them thoroughly and wait a few minutes. Then, water them again. When the water has soaked in and the pot is full of water like a squishy sponge, it’s time to weigh the plants. Create a table that shows how much each plant weighs before and after the experiment. Create a hypothesis by addressing these questions:
If you water plants and then put them in the sun, what will happen to the water?
Would anything change if you put a plastic bag around the base of the plant?
How would adding the bag change your experiment?
Transpiration Diagram
Put the plants in full, warm sunlight for an hour, then take off the plastic and weigh each plant again. Record the weight in the table. Is the weight different? The same? Why do you think that this is the case? Did different plants lose different amounts of weight, or did they lose around the same amount? Why?
Dry off the inside of each plastic bag. Re-seal the bags over the plants, return the plants to the sunny spot, and continue timing and weighing for several hours without adding any more water. What happens?
Results
During your transpiration experiment, the plants will lose water, even though they are in the bags. The broad-leafed plants will lose a little more than the thin-leafed plants, but depending on the size of the plant, it may not be measurable.