Nature of the usa. mountains, forest and clouds of the appalachian mountain systemNature of the USA. Mountains, forest and clouds of the Appalachian mountain system
Smoke is a stable dispersed system consisting of fine solid particlesSmoke is a stable dispersed system consisting of fine solid particles
Lightning discharge over water in the form of an arcLightning discharge over water in the form of an arc
An armchair and an old piano in an abandoned houseAn armchair and an old piano in an abandoned house