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Across 4. Substances that stay the same shape whether they are in a container or not. 7. The surface of a material, perceived by the sense of touch. 9. The property of reflecting light of a particular wavelength; the distinct colors of the spectrum are red, orange, yellow, green, blue, indigo, and violet, each of these shading into the next; the primary colors of the spectrum are red, green, and blue. 11. A substance which is not solid but which flows, for example water. 12. The appearance of an object, a person, or an area outside edges or surfaces, for example whether they are round, square, curved, or fat.

Down 1. A quality, attribute, or distinctive feature of anything; a characteristic attribute such as the density or strength of a material. 2. Particular aspects (objects or entities) of life (physical or spiritual) that cannot or need not be precisely named. 3. The physical part of the universe consisting of solids, liquids, and gases. 5. The dimensions, proportions, amount, or extent of something. 6. Put your hand onto something in order to feel it or to make contact with it. 8. The movement of a liquid, gas, or electrical current somewhere steadily and continuously. 10. A class or group having characteristics in common; sort; type.