Mr. Sharpe is concerned because the old wooden steps outside his house are becoming loose. He wants to design a safer set of steps. What should Mr. Sharpe do first?

Lin built a prototype for a new toy race car. During testing, the car would move only a short distance before coming to a sudden stop. What should Lin do next?

Before Wendy builds her prototype, she is sketching what it will look like. Which step of the engineering process is Wendy carrying out?

A company decides to make a new type of snow sled. The sled should slide easily but stop safely. What should the company do next?

Pablo designed a parachute that is intended to slow the fall of a toy rocket. He drew sketches of the design. What should Pablo do next?

Themba will build a bookcase for his room. Which decision does not need to be made before he starts building?

Sarah and Lily are testing their prototype of a paper airplane. It rises up at first but then crashes to the floor.

What should they do next?

What is the first step a student should take when designing a new boat?

Four students used craft sticks to build a bridge. It should hold a 5-kilogram (kg) weight without breaking. They tested their prototype, and it broke under the 5 kg weight. Now what should they do?

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?

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?

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?

Jane and Todd are making a weathervane that tells the direction of the wind. They tested three prototype designs in the same location. They recorded the direction each one was pointing in. They did this every hour for four hours. Jane and Todd compared their data to the data of a local weather station. Which question were they trying to answer?

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?

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?

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?

Choose the two correct answers.

Jane has a treehouse. She wants to build a tool to pull her toys up to the treehouse from the ground.

Click on the object she could use to put the toys in.

Click on the object she could use to pull the toys up to the treehouse.

Tim has a toy boat made of thick wood. His boat sinks in the water. He wants to replace the bottom of the boat. Three ideas for Tim’s new boat are listed. Which ideas will allow the boat to float or sink?

Click the answer of the idea that will float.

Perry designed a stand for a fish tank in the classroom. His prototype may need improvements. Which actions will help Perry improve his design?

Click on each action he should do to improve his protype.