Jill and Jack are making a weathervane that tells the direction of wind. They tested 3 prototype designs in the same place. They recorded their data every hour for 4 hours. They compared their data to the news. Which ? were they trying to answer?

Students are finding the combination locks in school hard to use. The students are trying to find a solution that does not cost too much and that they can do right away. Which solution should they choose?

Le designed a new kind of skateboard that anyone can use. He tested the skateboard with three different weights, 65, 80, and 105 pounds. With 105 pounds on it, the center sagged to the ground. What should Le’s next two steps be?

Farmers want to improve their farms with better technology. Which methods will NOT help them meet this need?

Paul and Kat work together to test different kinds of popcorn salt to see which one people like the most. Which step should they take to make sure their tests are fair?

Joel designed a tool for picking up metal screws that fall while he works on his car. The tool picks up the screws but drops them before Joel can pull them out. Which design change should he try next?

Larry is putting together a small, wooden flower box. He needs something to hold the wood together. It must cost less than $10 and should not rust. Which option is best for him to use?

Deena compares four different printers for her computer. She wants it to print in color and print more than six pages per minute. She wants to spend less than $0.13 per copy. Her research is shown in the table. Which printer should she choose?

Paul designed a stand for a fish tank in the classroom. His prototype may need improvements. Which action will NOT help Paul improve his design?

Jim’s friend suggests he use a piece of two-dollar plastic as part of a roof design for the bird feeder. This material would last longer because it would not rot. Which requirements would this suggestion fall under?

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