When a kettle is placed on the stove and water begins to boil, the hotter water at the bottom begins to rise and the cooler water above it begins to sink. What do we know about the relationship between the hotter water and the cooler
water?
The cooler water has less radiation.
The cooler water is denser.
O The hotter water has more radiation
The hotter water is denser

Which description best characterizes the motion of particles in a solid?

Wind and moving water provide energy. chemical mechanical thermal none of the above

Alice did an experiment to find the relationship between the angle at which a ray of light strikes a mirror and the angle at which the mirror reflects the light. she placed a ray box in front of a mirror. she changed the angle at which the light from the ray box struck the mirror and noted the corresponding angle at which the mirror reflected the light. which of the following is the dependent variable in this experiment? the mirror used to reflect the light the ray box used as the source of light angle at which the light from the ray box strikes the mirror angle at which the mirror reflects the light from the ray box