Tom wanted to know how much fertilizer he should give his tomato plants to maximize his yield. He used five plants, giving each plant a different amount of fertilizer but carefully made sure that he controlled for other variables which could affect tomato production. At the end of the summer he counted the number of tomatoes produced by each of the five plants. The plant with no fertilizer produced three tomatoes. The plant with 100 grams of fertilizer produced four tomatoes. The plant with 150 grams of fertilizer produced six tomatoes. The plant with 200 grams of fertilizer produced 10 tomatoes. The plant with 250 grams of fertilizer produced eight tomatoes. Experimental group: What is the independent variable? Control group: What is the independent variable? Experimental group: What is the dependent variable? Control group: What is the dependent variable? Experimental group: What is a controlled variable? Control group: What is a controlled variable? A. equal fertilizer application B. number of tomatoes produced C. fertilizer D. no fertilizer
Added by Miranda W.
Step 1
What is the independent variable? In this case, it is the amount of fertilizer given to the tomato plants. Show more…
Show all steps
Your feedback will help us improve your experience
Adi S and 98 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
A student is studying the effect of fertilizer on fruit growth. He uses 6 tomato plants, placing each in a garden where they get equal amounts of sun and water. One plant is given no fertilizer, while the other 5 plants are given 5, 10, 15, 20, and 25 grams of dissolved fertilizer each day for 3 weeks. At the end of the experiment the tomato fruits are weighed. What is the dependent variable in this experiment? sun exposure fruit weight amount of water amount of fertilizer
Madhur L.
Below is the description of an experiment. Researchers are interested in growing tomato plants that produce big tomatoes. They randomly select 24 tomato plants to be planted in a greenhouse. They look at two variables that may affect the size of tomatoes produced by the plants: Type of fertilizer and amount of watering. They choose two fertilizers, call them Mixture A and Mixture B. They can alter the amount of watering by watering a plant twice a day or three times a day. The greenhouse was chosen as the temperature, humidity, and other outside factors can be kept similar for each plant. They randomly assign six plants to a combination of fertilizer and watering amount. At the end of the growing season, the average weight of the tomato plants was recorded. Match the descriptions on the left to the correct term on the right. Mixture A, Mixture B and twice a day, three times a day Treatments The combinations of Fertilizer and Watering Amount Factors Type of Fertilizer and Amount of Watering Levels of the Factors
Sri K.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD