Physical Science Mixtures

mixture A ______________________ is a physical combination of substances. Snack mix is an example of a mixture. The substances in a snack mix remain the same even though they are close together.

heterogeneous 2. Mixtures like snack mix that have different parts you can plainly see are called ___________________________.

suspension 3. A _________________ is another type of heterogeneous mixture that requires you to look under a microscope. Over time, one or more parts of a suspension will settle to the bottom like mud in a stream. Other examples include salad dressings, orange juice, and medicines.

colloid, colloids 4. A __________________ is a heterogeneous mixture like a suspension, expect its parts do not settle. The suspened particles are just small enough not to layer out. Smoke, mayonnaise, and foam are examples of __________________.

homogeneous 5. A ________________________ mixture is a mixture that you cannot see the individual parts.

solution 6. A ___________________ is a homogenous mixture with parts that blend so that it looks the same everywhere, even under a microscope. Solutions can be made with solids, liquids, and gases. Many common household products are solutions: window cleaner, bleach, vinegar, and carbonated beverages.

solute 7. The smaller amount that is dissolved in a solution is called the _____________.

dissolves, solvent 8. The larger amount that ________________ the other substance is called the _________________.

alloy 9. An _________________ is a solution of a metal and another solid (often another metal.).

solubility 10. The maximum amount of a solute that can dissolve in a solvent is called the _______________________.

temperature 11. Solubility often depends on ______________________. Many substances, but not all, become more soluble at high temperatures.

water 12. Solubility can be given for many solvents, but _________________ is often called the universal solvent because it can dissolve many things.

physical methods 13. The parts of mixtures can be separated using _______________ _______________. Physical methods separate the parts of a mixture without changing the properties or identities.

Magnetism 14. ______________________ can be used to separate iron filings or other items that are magnetic.

Sifting 15. ______________________ can be used to separate materials of different sizes. A sieve or strainer can be used to separate small and large particles.

Filtration **Add to outline. ______________________ can be used to separate sand from water.

Flotation 16. ______________________ is a method to separate items with different densities, such as wood chips from water.

Evaporation 17. ______________________ can be used to separate salt from water by boiling the water and allowing the water to evaporate, leaving the salt behind.

Distillation, vaporization 18. ___________________________ separates the parts of a mixture by _________________and condensation.

gas 19. When a mixture of salt and water are heated, the water will change to ____________ leaving the salt in the container. If the water vapor (gas) is condensed in a cooling tube, it becomes water again that is free of all salt.