Question

1. jake conducted an experiment with four plants. they were planted next to one another on a sunny windowsill. he gave each plant equal amounts of a different type of water. the plants were given tap water, distilled water, flavored water, or carbonated water. he made the following observations after three weeks.

plant experiment observations

plant	type of water given daily	final observations
b	distilled	plant is 3 centimeters taller at the end of experiment. leaves are green. plant appears healthy.
c	flavored	new green leaves have appeared. no change in height recorded. plant appears healthy.
d	carbonated	leaves appear yellow. many leaves have fallen, others are drooping. plant does not appear healthy.

based on his results, jake concluded that tap water is not good for plants. how can jake change his experimental design to improve the validity of his results?
a. carry out multiple trials, and increase the number of plants that are given each type of water
b. establish a control group that includes different types of plants
c. establish another dependent variable to generate more data
d. carry out multiple trials that include fewer plants, and increase the types of water given to the plants

options: a, b, c, d with radio buttons

Explanation:

Answer:

A. carry out multiple trials, and increase the number of plants that are given each type of water