Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Jenny wanted to know whether the type of fertilizer she used affected how well her
tomato plants grew. She wanted to test 3 fertilizers: Fertilizer A, B, and C. Jenny
split up her garden into 3 sections and planted the same number of tomato plants in
each section. When planted, all of the plants were the same height and all sections
of the garden received the same amount of sunlight each day. Jenny used Fertilizer A
in section 1 of the garden, Fertilizer B in section 2, and Fertilizer C in section 3 of the
garden, ensuring that she used the same amount of fertilizer on each plant in each
section of her garden. She watered the plants at the same time of day with the same
amount of water for 3 months and then she measured how tall each of the plants in
each section were.
Which of the following is a confounding variable that could affect the results of the
experiment if it is not controlled? Choose all that apply.
Type of fertilizer
|Amount of sun exposure
Amount of fertilizer
Watering
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Transcribed Image Text:Jenny wanted to know whether the type of fertilizer she used affected how well her tomato plants grew. She wanted to test 3 fertilizers: Fertilizer A, B, and C. Jenny split up her garden into 3 sections and planted the same number of tomato plants in each section. When planted, all of the plants were the same height and all sections of the garden received the same amount of sunlight each day. Jenny used Fertilizer A in section 1 of the garden, Fertilizer B in section 2, and Fertilizer C in section 3 of the garden, ensuring that she used the same amount of fertilizer on each plant in each section of her garden. She watered the plants at the same time of day with the same amount of water for 3 months and then she measured how tall each of the plants in each section were. Which of the following is a confounding variable that could affect the results of the experiment if it is not controlled? Choose all that apply. Type of fertilizer |Amount of sun exposure Amount of fertilizer Watering
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