Causes of rusting practice exercise 3

A factory near Mombasa reports rapid deterioration of their iron roofing sheets compared to a similar factory in Eldoret. Give a scientific explanation. (2 marks)

A learner left an iron rod outside and another iron rod indoors. After one week, the outdoor rod had rust while the indoor one did not. Explain the reason for the difference. (2 marks)

A mechanic notices that some spare iron parts stored near the ocean are rusting faster than others kept inland. Explain why this is happening. (2 marks)

A mechanic notices that some spare iron parts stored near the ocean are rusting faster than others kept inland. Explain why this is happening. (2 marks)

A technician noticed that a set of iron tools stored in a damp store room showed more rust near the handles than on the blades. Suggest a reason for this uneven rusting. (2 marks)

A technician noticed that a set of iron tools stored in a damp store room showed more rust near the handles than on the blades. Suggest a reason for this uneven rusting. (2 marks)

During a school project, learners used iron nails to build a simple structure. After two weeks of rain, the nails turned reddish-brown. Explain the reason for this change.  (2 marks)

During a school project, learners used iron nails to build a simple structure. After two weeks of rain, the nails turned reddish-brown. Explain the reason for this change.  (2 marks)

Examine the diagram showing an iron machine part submerged in seawater for one week. Predict what will happen to the part and explain why. (2 marks)

Examine the diagram showing an iron machine part submerged in seawater for one week. Predict what will happen to the part and explain why. (2 marks)

Observe the diagram showing three different iron objects placed in varying environments. Identify which object is most likely to rust first and explain why. (2 marks)

Observe the diagram showing three different iron objects placed in varying environments. Identify which object is most likely to rust first and explain why. (2 marks)

Observe the diagram showing three different iron objects placed in varying environments. Identify which object is most likely to rust first and explain why. (2 marks)

Observe the diagram  below showing three different iron objects placed in varying environments. Identify which object is most likely to rust first and explain why. (2 marks)

The diagram below shows three storage locations for iron tools. Identify which one is most suitable to prevent rusting and explain why. (2 marks) Location Condition A Open yard, exposed to rain B Closed room with high humidity C Dry, well-ventilated toolbox

The diagram below shows three storage locations for iron tools. Identify which one is most suitable to prevent rusting and explain why. (2 marks) Location Condition A Open yard, exposed to rain B Closed room with high humidity C Dry, well-ventilated toolbox

Three iron objects were placed in different environments for one month: one in dry air, one in tap water, and one in salty water as shown below. Which one rusted the most, and why? (2 marks)

Three iron objects were placed in different environments for one month: one in dry air, one in tap water, and one in salty water as shown below. Which one rusted the most, and why? (2 marks)

Three iron objects were placed in different environments for one month: one in dry air, one in tap water, and one in salty water as shown below. Which one rusted the most, and why? (2 marks)

Wekesa left his panga outside overnight. In the morning, he found brown colour on some parts. What was the likely cause of rusting?  (2 marks)

Wekesa left his panga outside overnight. In the morning, he found brown colour on some parts. What was the likely cause of rusting?  (2 marks)