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Answer:
Oxygen and heat can cause various reactions with materials around us:
- Oxygen: It can cause oxidation, which may lead to rusting of metals, degradation of organic materials, and reactions with various substances. For example, iron rusts when exposed to oxygen and moisture.
- Heat: It can cause materials to expand, melt, or change state. It accelerates chemical reactions, which can lead to burning, decomposition, or alteration of materials. For instance, heat can melt ice into water or burn paper into ash.