You are given a background paragraph that describes one or more causal or qualitative relationships such as a relationship in economics or a scientific law and a story that makes use of the concepts or the relationship described in the provided paragraph. You are also given a question about the story that requires an understanding of the relationship described in the background paragraph and the story. You need to come up with an answer to the given question; the answer will be a span from either the question or the story. In order to correctly answer the given question, you need to understand the relationship mentioned in the background paragraph and should be able to use it to understand that in the story. Your answer can not consist of any word that is not mentioned in any of these: the background paragraph, the story, or the question. You can directly copy and paste a span from the story or the question while answering the given question.
Q: Background Paragraph: When a solid substance is involved in a chemical reaction, only the matter at the surface of the solid is exposed to other reactants. If a solid has more surface area, more of it is exposed and able to react. Therefore, increasing the surface area of solid reactants increases the reaction rate. Look at the hammer and nails pictured in the Figure below . Both are made of iron and will rust when the iron combines with oxygen in the air. However, the nails have a greater surface area, so they will rust faster.
Story: Andy is participating in this years science fair. He is testing how fast metal takes to rust. He rakes 3 pieces of iron one is a cube, and the other is a sheet both weighing the same. It takes the cube almost a week to fully rust but the sheet only takes 2 days. The only difference between the two is that the sheet has more surface area. He tries this again with a cylinder so the surface area is larger than the cube but smaller than the sheet and it takes about 4 days to fully rust.
Question: Will making the surface area of iron larger increase or decrease how fast it rusts?
A:
increase.