In the summer, this famous tower can grow up to 15 cm taller! How does this happen?

Heat gain causes matter (solid, liquid and gas) to expand. The hot weather in the summer causes the Eiffel Tower to gain heat. The particles in the Eiffel Tower will then begin to vibrate faster and occupy a larger volume.This is known as the process of thermal expansion, which allows the Eiffel Tower to grow up to 15 cm taller in the summer!                      Matter contracts when losing heat. When the temperature drops, the Eiffel Tower will contract once more.