Macroscopic vs. Microscopic Energy

Model how macroscopic energy is a combination of particle motion and relative particle positions (HS-PS3-2).

Macroscopic Scale: Metal Block

20 °C

Add/Remove Heat:

Macroscopic View: We feel thermal energy as temperature. Adding heat makes the object hotter.

Microscopic Scale: Particle Lattice

Note: Changes in particle movement and sizes are exaggerated for educational purposes.

Microscopic View: Thermal energy is actually the kinetic energy (motion/vibration) of the particles. Higher temperature = faster particle motion.

Temperature (°C)	Kinetic Energy (Rel)

Macroscopic Scale: Stretching a Spring

Mass

Stretch Spring (Store Energy):

Macroscopic View: Stretching a spring stores elastic potential energy in the system.

Microscopic Scale: Molecular Bonds

Note: Changes in particle movement and sizes are exaggerated for educational purposes.

Microscopic View: Potential energy is the energy associated with the relative position of particles. Stretching pulls atoms apart against attractive electromagnetic forces between them.

Stretch (%)	Potential Energy (Rel)