GRADE 4 SCIENCE · CHAPTER 1
Engineering & design
Study each lesson in order, or choose the idea you need today.
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Engineering design
Compare prototypes with a fair test
Plan a comparison that changes one intended design feature while controlling other important conditions.
AN EXAMPLE FROM THIS CHAPTER
A team wants to test how ramp height affects its model. It can use the same car and surface. Which comparison best isolates the effect of ramp height?
Show answer & explanation
Change ramp height while keeping the car and surface the same.
Only the named design feature changes, so the comparison gives clearer evidence about that feature.
Curriculum & source notes
These are original Little Play study books organized around U.S. school topics. The official curriculum references below guide topic scope and progression. Coverage is selected, not a complete curriculum or a verified match to every state standard. They are not copies of a publisher’s textbook. Check your school’s syllabus and book edition.
High-school courses can be taken in different years. Choose the topic that matches the student’s current course.
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