Changes of Matter
Your ice cream is dripping off the cone. The temperature that the ice cream has reached is its ______.
What is melting point?
If a liquid is cooled, it can change to a _____.
What is a solid?
The method that can be used to separate the pretzels from a snack mix of pretzels, raisins, and peanuts.
What is hand sorting?
A change in matter that does not form a new substance is called a _______ change.
What is physical change?
According to the ________ , matter can change form, and people cannot create and destroy matter.
What is the law of conservation of matter?
The process of a liquid changing to a solid is _____.
What is freezing?
When melted candle wax and melted chocolate solidify, the wax and the chocolate have reached their ______.
What is freezing points?
The method that would best separate a heterogeneous mixture of rice and small metal pieces.
What is magnetic attraction?
a mixture in which the individual substances are not spread evenly throughout, or in which the individual substances are not uniform
What is heterogenous?
Two or more substances that are physically combined and that do not form a new substance form a/an ______.
What is a mixture?
It is important for pastry chefs to understand chemical changes in matter because _______. (Hint: There are 2 answers.)
1. they need to understand what will happen when they combine certain ingredients
2. they must bake the ingredients at the right temperature for the right amount of time to ensure the pastry is thoroughly cooked
Rust on a metal garden tool is an example of a ____ change.
What is chemical change?
A homogeneous mixture in which two or more substances are spread evenly throughout the mixture is a ______.
What is a solution?
In a saltwater solution, salt is the substance that is dissolved. Salt is the ______.
What is a solute?
In a saltwater solution, water is the substance that dissolves the salt. Water is the _____.
What is a solvent?
Three evidences of a chemical change include ______.
1. a change in color
2. a change in the state of matter
3. a change in odor
If a gas is cooled, it can change to a _______.
What is liquid?
Three ways to increase the rate of dissolving are to ________. (Hint: There are 3 answers)
1. crush, crumble, or cut the solute to increase the surface area
2. stir the solution to bring fresh solvent into contact with the solute
3. heat the solvent to increase the movement of the particles
a solid solution made of two or more elements, including at least one metal
What is an alloy?
a solution that has more than the normal amount of solute in the solvent
What is concentrated?
The process of a gas changing to a liquid is _____.
What is condensation?
Burning a log in a firepit is an example of a chemical change and the
conservation of matter. When the log burns, _____. (Hint: 2 answer choices)
1. the wood gives off a distinct odor
2. 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
A solution and a homogeneous mixture are related because _______. (Hint: there are 2 answers)
1. a solution is a homogeneous mixture
2. the individual substances in both are spread evenly throughout
a solution that is holding all the solute that the solvent can dissolve
What is saturated?
A chemical change does what? (Hint: There are 3 answers)
1. occurs when the atoms in an element or compound are rearranged to form a new substance
2. causes elements or compounds to lose their individual properties
3. can cause two or more pure substances to change into a new substance