Part I: Preparation
This experiment will be done using the following images and data. There are two cups, one EXPERIMENTAL and one CONTROL group. Each one will have four beans planted in it, and the EXPERIMENTAL cup will get half as much water as the CONTROL cup. all the other factors (like how much light and air they get) will remain the same.
State what you predict will happen in the Hypothesis section below.
Part II: Planting
1. In the CONTROL group there is gravel, soil, and four beans in the cup. 30 mL of water is added to moisten the soil. See Figure 1 below.
In the EXPERIMENTAL group, there is gravel, soil, and four beans in the cup. 15 mL of water is added to moisten the soil.
Figure 1: Setup
Hypothesis
State the variable you chose and your hypothesis as an if/then statement as shown in the sample. These statements reflect your predicted outcomes for the experiment.
What is the independent variable? _____________
What is the dependent variable? _______________
Sample hypothesis: If I use sand as the substrate, then the beans will grow taller by 2 cm.
My hypothesis: _________________________________________________________________
What is the independent variable? The independent variable is the amount of water given to the cups (half as much water for the EXPERIMENTAL cup compared to the CONTROL cup).
What is the dependent variable? The dependent variable is the growth of the beans (height, number of leaves, etc.).
My hypothesis: If the EXPERIMENTAL cup receives half as much water as the CONTROL cup, then the beans in the EXPERIMENTAL cup will have slower growth and smaller size compared to the beans in the CONTROL cup.