TCA 2019 6th Science Physical/Chemical Changes

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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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