A school has a small garden where students use iron gardening tools such as shovels, trowels, rakes and pruning shears. After gardening, some students wash the tools with water and leave them outside. A few days later, the tools develop a reddish-brown coating. The science teacher explains that iron reacts with oxygen in the presence of water (moisture) to form rust. To protect the tools, the teacher asks the students to clean and dry them after use and apply a thin layer of oil before storing them in a dry cupboard.
Answer the following questions with the right answer:
1. Which two conditions are necessary for rusting of iron? -
2. Which of the following methods will NOT help prevent rusting? -