Sean is thinking about using seawater to water his plants. Sean places 4 points
10 spider plants near a window for 20 days. Each day, he waters five plants
with 10 mL of seawater and five plants with 10 mL of fresh water. He
measures their heights before and after the 20 days. Which of the
following could be a hypothesis for Sean's experiment?
plants need water to grow
plants need sunlight to grow
salt water affects the growth of plants
different types of plants are affected by salt water differently