Design an investigation that demonstrates the idea that the strength of magnets depends on distance and mass. Then, relate this to the strength of gravity.
*For some background information about grsee “Gravity 1” and “Gravity 2” in the physical science section
MODEL CURRICULUM (Grade 8)- Physical Science
TOPIC- Forces and Motion
CONTENT STATEMENT- Forces between objects act when the objects are in direct contact or when they are not touching. Magnetic, electrical and gravitational forces can act at a distance.
GRADE 8 CONCEPTS- Gravitational force weakens rapidly with increasing distance. The gravitational force increases with mass of the objects, decreases rapidly with increasing distance and points toward the center of objects,