Heat

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Heat is a kind of energy like sound and light. Explain to children that they can see and feel examples of heat all around them. They can observe heat’s effects when they go outside in the sunshine and feel the warmth on their skin. At night, outdoor temperatures drop because that part of the Earth is not facing the Sun. The Sun is a source of light and heat for the Earth and all living things rely on the Sun in order to survive. Cold-blooded animals, such as snakes, lizards, frogs, salamanders, and insects, cannot produce their own heat and rely on the Sun to warm their bodies. Warm-blooded animals, such as humans and birds, can create their own body heat.