Science
Forces & Motion
Conceptual
7–8 yrs
Contact & Non-Contact Forces
接触力与非接触力
Description
Notice that some forces need contact between two objects (contact forces) while magnetic forces can act at a distance (non-contact forces)
Mastery Evidence
- Define contact forces as those needing objects to touch (e.g. push, pull, friction)
- Define non-contact forces as those acting at a distance (e.g. magnetism)
- Sort examples of forces into contact and non-contact categories
Assessment Prompt
Can your child explain why you have to touch a ball to kick it, but a magnet can pull a paperclip without touching it?
