chemsitry- matter in our surroundings

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Across
  1. 2. The resistance of a liquid to flow.
  2. 5. The boiling point of a liquid is defined as the temperature at which the vapour pressure of the liquid is equal to the atmospheric pressure.
  3. 6. of a solid is defined as the temperature at which solid melts to become liquid at the atmospheric pressure.
  4. 7. A mixture that has a uniform composition and properties throughout, also known as a solution.
  5. 9. A state of matter in which the substance has no definite shape or volume, and the particles are far apart and move freely.
  6. 12. A combination of two or more substances that are not chemically combined and can be separated by physical means.
  7. 13. A mixture that does not have a uniform composition and properties throughout.
  8. 14. Anything that has mass and occupies space is called matter.
  9. 15. It is the amount of heat energy that is required to change 1 kg of a solid into liquid at atmospheric pressure at its melting point.
  10. 16. When the particles of matter intermix on their own with each other, the phenomenon is called diffusion. For example, spreading of ink in water.
  11. 19. It is the amount of heat energy that is required to change 1 kg of a liquid into gas at atmospheric pressure at its boiling point.
Down
  1. 1. The change of state from a solid to a liquid as a result of the addition of heat.
  2. 3. The transition of a substance directly from its solid phase to gaseous phase without changing into the liquid phase
  3. 4. A state of matter in which the substance has a definite shape and volume, and the particles are tightly packed together.
  4. 8. The phenomenon by which molecules in liquid state undergo a spontaneous transition to the gaseous phase at any temperature below its boiling point is called evaporation.
  5. 10. is an aspect of matter that can be observed or measured without changing its nature or composition.
  6. 11. The change of state from a liquid to a solid as a result of the removal of heat.
  7. 17. Properties Characteristics of matter that describe how a substance interacts or reacts with other substances to form new substances.
  8. 18. The ability of a substance to float or sink in a fluid based on the relative densities of the substance and the fluid.
  9. 19. A state of matter in which the substance has a definite volume but no definite shape, and the particles are close together but not tightly packed.