TCA 2019 6th Science Physical/Chemical Changes
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25 terms
Terms | Definitions |
|---|---|
 sublimation | a change from a solid to a gas |
| mellting | the temperature at which water changes from a solid to a liquid is the ______ point |
| contratction | a decrease in an object's volume because of a change in temperature is thermal _____ |
| freezing | the temperature at which water changes from a liquid to a solid is its ______point |
| boiling | the temperature at which water changes from a liquid to a gas is the ______ point |
| colloid | I am smoke, cheese and foam, a mixture that doesn't settle |
| solvent | the water in sugar water |
| solute | the sugar in sugar water |
| alloy | steel and brass |
| solubility | the maximum amount of solute that can go into a solvent |
| distillation | using evaporation and condensation, I can separate the liquids in a mixture |
| mixture | a combination of 2 or more materials, but none of my parts are chemically combined |
| solution | can be made with solids, liquids or gases. all my parts blend so that I look the same everywhere, even under a microscope |
| reactants | are on the left side of a chemical equation |
| products | are on the right side of a chemical equation |
| photosynthesis | the chemical reaction that plants use to produce sugar |
| compound | a chemical combination of 2 or more elements |
| acid | tastes sour and turns litmus blue, litmus red, in water I produce H+ ions |
| acidity | represent the strength of an acid |
| alkalinity | the strength of a base |
| base | tastes bitter and feels soapy, in water it produces OH- ions |
| electrolyte | can dissolve in water to form ions, which allows it to conduct electricity |
| ion | have lost or gained electrons, which gives it a positive or negative charge |
| neutralization | can occure when acids and bases are mixed together |
| pH | can tell you how acidic or basic a substance is |
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