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Stage 1
Answer 3 questions correctly in a row.

People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design.

The passage below describes how the engineering-design process was used to test a solution to a problem. Read the passage. Then answer the question below.

fabric that has not absorbed drops of water

Jackson, a materials engineer, was developing a quick-drying fabric for athletic clothing. The fabric needed to absorb one drop of water in less than one second and dry completely in less than five minutes. Jackson thought a fabric made from cotton and polyester would both absorb water well and dry quickly. But he needed to decide what percentage of each material to use.
So, he made a sample fabric that was 50% cotton and 50% polyester. Then he put one drop of water on the sample. He timed how long it took the fabric to dry after the water was absorbed.