Kernels of corn are heated and become popcorn. why is this a chemical change? a) the size and color of the corn have changed b) the kernels change due to their reaction of heat c) the volume of the kernels expand d) the mass of the kernels increase

Which term describes a fracture in the earth at which land stays in the same place? a. joint b. fault c. split d. hinge

Which statement explains why the bonds between non metals tend to be covalent? the bonds are found to be nondirectional they have large differences in electronegativity they have small differences in electronegativity they have ions that produce an electrostatic pull

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?