3rd U1 Lesson 1 Review

Machines make our lives __________.

• harder

• easier

Scientist who develop and create different machines.

• Engineers
• Technicians
• Scientists

Thing or situation that needs to be solved.

• solution

• problem

• goal

• wood

• paper

• plastic

• cotton

• cotton

• paper

• zipper

• plastic

Engineers need to ________ their inventions to see how well they work.

• draw a plan

• test

• improve

• build

Gideon Sundback created the ________.

• buttons

• zipper

• laces

• hook and eye

• velcro

• zipper

• hook and eye

• button

• velcro

• zipper

• hook and eye

• button

• velcro

• zipper

• hook and eye

• button