contain, to have something inside, develop, to make something new or better, discover, to find something for the first time, do research into, to study something carefully to learn more about it, foam, a mass of small bubbles, material, what something is made from, mix, to put two or more things together, powder, a dry substance made of very small pieces, produce, to make or create something, run a test, to check how well something works, stick, to attach one thing to another, system, a group of parts that work together, thermometer, a tool that shows how hot or cold something is, Velcro, a material with two sides that join together, weigh, to find how heavy something is

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