Energy , It helps things move, grow, and work. We need it to play and live., Heat, It makes things warm or hot. The sun gives us this., Temperature, It tells how hot or cold something is., Thermometer, It is a tool used to measure temperature., Degree Celsius (°C), It is a unit used to measure temperature, like 0°C or 30°C., Heat gain, When something gets hotter because it receives heat., Heat loss, When something gets cooler because heat goes away., Matter, Anything that has size and weight, like air, water, or a book., States (of matter), Different forms of matter, such as solid, liquid, and gas., Expand, When something gets bigger when it is heated., Contract, When something gets smaller when it cools down., Good conductors of heat, Materials that let heat pass through easily, like metal., Poor conductors of heat, Materials that do not let heat pass through easily, like wood or plastic..

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