Science
Forces & Motion
Procedural
8–9 yrs
Balanced & Unbalanced Forces
平衡力与非平衡力
Description
Plan and conduct an investigation to provide evidence of the effects of balanced and unbalanced forces on the motion of an object
Mastery Evidence
- Define balanced forces (equal in size, opposite in direction — no change in motion) and unbalanced forces (cause motion to change)
- Plan a fair test investigating how different force sizes affect an object's motion
- Use results as evidence to explain when forces are balanced versus unbalanced
Assessment Prompt
Can your child explain why a book sitting on a table doesn't move (balanced forces) but slides when you push it (unbalanced forces)?
