Planning Fair Tests Practice Test

Change how tall the plants are by trimming some leaves, then see which plants are taller at the end of 2 weeks.

Change the amount of water each day for different plants, and also use different pot sizes, then compare the growth after 2 weeks.

Change the plant type for each pot, using beans, peas, and flowers, and then compare which type grows tallest after 2 weeks.

Change where the plants are placed: 3 in a sunny window and 3 in a shady corner, while keeping pot size, soil, water, and start day the same.