Matching
A Mixture in which 2 or more substances are spread evenly throughout
Homogeneous Mixture
According to the law of conservation of matter, people can create and destroy matter.
False
It is important for pastry chefs to understand chemical changes in matter because ___. Select all that apply.
A. they need to understand what will happen when they combine certain ingredients
B. it will not affect the pastry if the ingredients are not measured accurately
C. they can bake the ingredients at any temperature for any amount of time and still have a tasty pastry
D. they must bake the ingredients at the right temperature for the right amount of time to ensure the pastry is thoroughly cooked
A and D
The process of a gas changing to a liquid is ___.
A. condensation
B. melting
C. vaporization
The process of a liquid changing to a solid is ___.
A. condensation
B. freezing
C. vaporization
Condensation and Freezing
A homogeneous mixture in which two or more substances are spread evenly throughout the mixture is a ___.
A. solute
B. solution
C. solvent
Solution
a solution that has more than the normal amount of solute in the solvent
Concentrated
If a liquid is cooled, it can change to a solid.
True
Burning a log in a firepit is an example of a chemical change and the conservation of matter. When the log burns, ___. Select all that apply.
A. the wood does not change color
B. the wood gives off a distinct odor
C. the mass of the ashes in the firepit equals the mass of the original piece of unburned wood
D. the mass of the ashes and soot in the firepit plus the mass of the gases in the air equals the mass of the original piece of unburned wood
B and D
Your ice cream is dripping off the cone. The temperature that the ice cream has reached is its ___.
A. boiling point
B. condensation point
C. melting point
Melting Point
Which method can be used to separate the pretzels from a snack mix of pretzels, raisins, and peanuts?
A. filtration
B. hand sorting
C. settling
Hand Sorting
a solid solution made of two or more elements, including at least one metal
Alloy
If a gas is cooled, it can change to a liquid.
True
Three evidences of a chemical change include ___. Select all that apply.
A. a reversible change
B. a change in color
C. a change in the state of matter
D. a change in odor
B, C and D
When melted candle wax and melted chocolate solidify, the wax and the chocolate have reached their ___.
A. boiling points
B. freezing points
C. melting points
Freezing Points
Which method would best separate a heterogeneous mixture of rice and small metal pieces?
A. evaporation
B. filtration
C. magnetic attraction
Magnetic Attraction
a mixture in which the individual substances are not spread evenly throughout, or in which the individual substances are not uniform
Heterogeneous Mixture
According to the law of conservation of matter, matter can change form.
True
A chemical change ___. Select all that apply.
A. occurs when the atoms in an element or compound are rearranged to form a new substance
B. does not form a new substance
C. causes elements or compounds to lose their individual properties
D. can cause two or more pure substances to change into a new substance
A, C and D
A change in matter that does not form a new substance is called a ___ change.
A. chemical
B. matter
C. physical
Physical
In a saltwater solution, salt is the substance that is dissolved. Salt is the ______
In a saltwater solution, water is the substance that dissolves the salt. Water is the _____
Salt is the SOLUTE
Water is the SOLVENT
a solution that is holding all the solute that the solvent can dissolve
Saturated
A solution and a homogeneous mixture are related because ___. Select all that apply.
A. they both consist of one substance
B. a solution is a homogeneous mixture
C. the individual substances in both are spread evenly throughout
D. the individual substances in a solution are spread evenly throughout, but the individual substances in a homogeneous mixture are not spread evenly throughout
B and C
Three ways to increase the rate of dissolving are to ___. Select all that apply.
A. crush, crumble, or cut the solute to increase the surface area
B. stir the solution to bring fresh solvent into contact with the solute
C. heat the solvent to increase the movement of the particles
D. leave the solute whole to decrease the surface area
A, B and C
Rust on a metal garden tool is an example of a ___ change.
A. chemical
B. physical
C. reversible
Chemical
Vegetable soup is an example of a/an _________ mixture.
Two or more substances that are physically combined and that do not form a new substance form a/an _______.
Heterogeneous
Mixture