EVERYDAY ECOLOGY
Planning a container trial
Practice worksheet / 2026-04-26

Student: Sofia Marino

- Show calculations and include units where needed.
- Write short explanations in complete sentences.
- Use the separate answer key after completing the questions.

1. You want to compare two soil mixes. Name three conditions that should be kept the same.





2. A container weighs 2.80 kg after watering and 2.46 kg two days later. Calculate the decrease in mass.





3. Explain why a single observation after a rainy day is not enough to compare the soil mixes.

Sofia Marino                                                                                                                      WS-2604-0264
Answer key
Planning a container trial

Question 1
Possible answers: container size, plant species and size, light exposure, watering method, observation period.

Question 2
0.34 kg, or 340 g.

Question 3
Rain changes the water input. Repeated observations under recorded conditions are needed to distinguish a
consistent difference from daily variation.