Mixtures
A mixture in which the individual substances are NOT spread evenly throughout, or in which the individual substances are NOT uniform
heterogeneous mixture
A homogeneous mixture in which two or more substances are spread evenly throughout the mixture is a ________.
solution
Rust on a metal garden tool is an example of a _________ change.
chemical
A change in matter that does not form a new substance is called a ___________ change.
physical
The process of a liquid changing to a solid is _____.
freezing
A mixture in which two or more substances are spread evenly throughout
homogeneous mixture
A solution and a homogeneous mixture are related because ______________ and ______________.
a solution is a homogeneous mixture, and the individual substances in both are spread evenly throughout
Why is it important for pastry chefs to understand chemical changes in matter? (2 reasons)
They need to understand what will happen when they combine ingredients and they must bake the ingredients at the right temperature for the right amount of time
True or False: The law of conservation of matter states that people can create and destroy matter.
False
The process of a gas changing to a liquid is _____.
condensation
Which method would best separate a heterogeneous mixture of rice and small metal pieces?
magnetic attraction
Three ways to increase the rate of dissolving are to _______________, _________________, and __________________.
crush, crumble, or cut the solute to increase surface area, stir the solution, heat the solvent to increase movement
Three evidences of a chemical change include: a change in _________, a change in ___________, and a change in the state of _________.
color; odor; matter
True or False: According to the law of the conservation of matter, matter can change form.
True
Your ice cream is dripping off the cone. The temperature that the ice cream has reached is its ______________.
melting point
Which method can be used to separate the pretzels from a snack mix of pretzels, raisins, and peanuts?
hand sorting
A solution that has more than the normal amount of solute in the solvent
concentrated
Burning a log in a firepit is an example of a chemical change and the conservation of matter. When the log burns, the wood gives off a distinct __________, and the mass of the ashes and soot in the firepit plus the mass of the gases in the air _________ the mass of the original piece of unburned wood.
odor; equals (or is the same)
Two or more substances that are physically combined and that do not form a new substance form a/an ________________.
mixture
When melted candle wax and melted chocolate solidify, the wax and the chocolate have reached their __________.
freezing point
A solution that is holding all the solute that the solvent can dissolve
saturated
A chemical change:
occurs when the atoms in an element or compound are rearranged to form a new ___________,
causes elements or compounds to lose their individual ____________
can cause two or more pure substances to change into a new __________
substance; properties; substance
Vegetable soup is an example of a ___________ mixture.
heterogeneous
If gas is cooled, it can change to a _________.
liquid
In a saltwater solution, water is the substance that dissolves the salt. Water is the __________.
solvent
In a saltwater solution, salt is the substance that is dissolved. Salt is the ____________.
solute
If a liquid is cooled, it can change to a ________.
solid