Extension Experiment and Questions Tommy’s Tomatoes

Extension Experiment and Questions Name: ____________________ Tommy’s Tomatoes White light is composed of other colors/wavelengths of light. These wavelengths have different amounts of energy. A question that if often posed asks which wavelengths of light would make plants grow best. You set up the following experiment: 6 tomato plants of the same variety potted in the same kind of soil. Each plant received the same amount of water and fertilizer for 3 months. Five of the plants received light of only a certain color. One plant received natural daylight. The amount of time each plant was exposed to light was the same. Measurements of the height of each plant at the beginning of the experiment and at the end of 100 days is found below. Plant Color of Light Plant 1 Plant 2 Plant 3 Plant 4 Plant 5 Plant 6 daylight red blue yellow orange violet Day 0 10 11 9 12 10 11 Plant Height (cm) over 100 days Day 25 Day 50 Day 75 14 19 22 18 26 31 16 23 30 14 17 19 13 17 20 17 23 29 Day 100 29 36 38 22 24 35 Overall Growth (cm) 1. Graph the OVERALL GROWTH only for each color of light. 2. Based on the overall growth, under which color of light did the plant grow the most? Give data to support your answer. ___________________________________________________________________________________________ ___________________________________________________________________________________________ 3. If you were to redo the original experiment, what would you change in the experiment to increase the outputs of photosynthesis? Explain. ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ A Plant’s Raw Materials Name: ___________________________ Graph the data provided to determine the response to the variable. Label the both the X and Y axis. Number of Oxygen bubbles vs. Amount of Water Conclusion Questions: 1. What trend is seen between 0-10mL? Use data to support your answer. ________________________________ ___________________________________________________________________________________________ 2. If the experiment continued from 11-15mL with increasing amounts of water, predict what would happen to the number of oxygen bubbles. _____________________________________________________________________ ___________________________________________________________________________________________ Get Data Table 2. Add this data to your graph using a different color. 3. What trend is seen between 11-15mL? Use data to support your answer. _______________________________ ___________________________________________________________________________________________ 4. If the experiment continued from 16-20mL of water, predict what would happen to the number of oxygen bubbles. ____________________________________________________________________________________ ___________________________________________________________________________________________ 5. Predict the number of oxygen bubbles if the amount of water is a. 18 mL (plot this on your graph) ___________________. Explain. ________________________________ _____________________________________________________________________________________ b. 20 mL (plot this on your graph) ___________________. Explain. _________________________________ _____________________________________________________________________________________