Limits on Materials, Time, and Cost Practice Test

Look at the water filter project description. Design a filter to remove dirt from dirty water. Students can use only coffee filters, sand, gravel, and plastic bottles, and must finish during a 40-minute science period. They must use items the teacher already has and cannot go shopping. According to the description, what limits how students can solve this problem?

Read about the classroom library display challenge. You must display this week's featured books. You can use only cardboard boxes, construction paper, tape, and scissors, and it must cost $0. You must set it up in under 15 minutes, and you cannot use any other materials. Which describes the limits on this design project?