Forces and Energy
Energy is never created or destroyed
Energy can be changed
The sun releases energy and doesn't create it
Energy can be passed on
Convection
Radiation
conduction
Energy travels in different ways
Light doesn't need a medium to travel through
Sound waves need a medium to travel through
Forces can affect objects close to it or far away
Magnetic forces protect us from particles from the sun
Gravitational forces affect us at the surface and pull on objects from many miles away