Heat and Waves Science Quiz For Kids Online, science activity for 4th, 5th And 6th Grade Kids. When objects get heated, the heat eventually moves from hot to cold places. In fluids i.e. liquids and gases, heat moves through convection. E.g. when water is being heated, heat moves from the heat source to other places through convection; the same applies to gases that get heated. In this quiz students will learn about both concepts and how they interact. Learn and review your skills both on PC and mobile and earn grades instantly. Click and start reviewing.