When water reacts with potassium metal the hydrogen produced ignites explosively on the surface of water .What cause the ignition

Which statement is true about the part of the electromagnetic spectrum that human eyes can detect? it contains only the colors of the rainbow and television waves. o it is divided into seven ranges of wavelengths. it contains ultraviolet, visible, and infrared light. it is divided into nine ranges of wavelengths.

Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.

Aperfume bottle is dropped in the corner of a room. the odor of the perfume can be detected on the other side of the room. which statement best describes this observation?