1. The plant with the highest growth rate is Plant 3, which grew 2.5 cm per week. This is determined by comparing the "Growth Rate (cm/week)" column for each plant: Plant 1 = 1.8, Plant 2 = 2.0, Plant 3 = 2.5, Plant 4 = 1.5, Plant 5 = 2.2.
2. The average growth rate across all five plants is 2.0 cm per week. This is calculated by summing the individual growth rates (1.8 + 2.0 + 2.5 + 1.5 + 2.2 = 10.0) and dividing by the number of plants (5): 10.0 / 5 = 2.0.
3. If a new plant grows at 3.0 cm per week, it would be taller than all the existing plants after 4 weeks. After 4 weeks, the new plant would be 3.0 cm/week × 4 weeks = 12.0 cm tall. The tallest existing plant (Plant 3) would be 2.5 cm/week × 4 weeks = 10.0 cm tall. Since 12.0 cm > 10.0 cm, the new plant would be taller.
4. The total amount of water used by all five plants over the 4-week period is 1600 mL. Each plant received 80 mL of water per week. For 5 plants over 4 weeks: 5 plants × 80 mL/week × 4 weeks = 1600 mL.
5. The plant that received the least amount of light (Plant 4, 2 hours/day) had the lowest growth rate (1.5 cm/week). The plant that received the most light (Plant 3, 8 hours/day) had the highest growth rate (2.5 cm/week). This suggests a positive correlation between light exposure and growth rate under these experimental conditions.
Parent Tip: Review the logic above to help your child master the concept of data analysis worksheet answers.
