The temperature at which a substance changes from a solid to a liquid.
melting point
The properties of a mixture can vary because the composition of a mixture is not ________.
fixed
What is the chemical symbol for carbon?
C
A process used to separate mixtures based on the size of the particles.
filtration
Both solutions and colloids are considered ___________ mixtures.
homogeneous
TRUE or FALSE: When iron is heated until it turns red, the color change shows that a chemical change has taken place
FALSE
TRUE or FALSE: Flammability is a material’s ability to burn in the presence of carbon dioxide
FALSE
TRUE or FALSE: In a physical change, some of the substances is a material change, but the properties of the material stay the same.
FALSE
TRUE or FALSE: The substances in a candle do not change when the candle burns.
FALSE
TRUE or FALSE: A compound can be broken down into simpler substances.
TRUE
The property that describes how readily a substance combines chemically with other substances is __________ .
reactivity
The resistance of a liquid to flowing
viscosity
An element has a __________ composition because it contains only one type of atom.
fixed or set
What is the chemical symbol for aluminum?
Al
TRUE or FALSE: A compound always contains at least two elements.
TRUE
The ratio of the mass of a substance to its volume.
density
Which is NOT an example of chemical change? baking a cake, leaves changing color, ripping a piece of paper, food being digested
ripping a piece of paper
A ________________ is a substance that cannot be broken down into simpler substances. .
element
TRUE or FALSE: If salt water is poured through a filter, the salt will be trapped on the filter.
FALSE
What are two categories of pure substances?
elements and compounds
A suspension is considered a ____________ mixture.
heterogeneous
The ability of a solid to be hammered without shattering
malleability
A _______________ is any property that produces a change in the composition of matter.
chemical property
TRUE or FALSE: A homogeneous mixture is a mixture in which it is difficult to distinguish the substances from one another.
TRUE
A(n) _____________ change occurs when a substance reacts and forms one or more new substance.
chemical
When matter undergoes a chemical change, the composition of the matter ____________________.
changes
TRUE or FALSE: A liquid with a high viscosity flows more slowly than a liquid with a low viscosity at the same temperature.
TRUE
The ability to allow heat to flow.
conductivity
Term used to describe the homogeneous mixture that forms when sugar is dissolved in a glass of water.
solution
A process used to separate mixtures based on boiling point.
distillation
When matter undergoes a physical change, the composition of the matter _________.
stays the same
List two examples of colloids.
fog, homogenized milk
Which of the following is a gas at room temperature: carbon, oxygen, mercury or nitrogen?
oxygen and nitrogen
A compound is a pure substance that is made from _____________ and can be broken down into those simple substances.
two or more simpler substances
TRUE or FALSE: The smallest particle of an element is an atom.
TRUE
A __________ mixture is a mixture whose parts are noticeably different from one another.
heterogeneous
8. Two processes that are commonly used to separate mixtures are _______________ and _________________.
filtration, distillation
TRUE or FALSE: A compound has the same properties as the elements from which it is formed.
FALSE
A ________________ is any characteristic of a material that can be observed or measured without changing the composition of the substances in the material.
physical change
What is the chemical symbol for gold?
Au
TRUE or FALSE: Usually, people consider only one property when choosing a material.
FALSE
TRUE or FALSE: The substances that make up a compound are always joined in a fixed proportion.
TRUE
TRUE or FALSE: Discovering which of two materials can scratch the other is a way to compare the hardness of the material.
TRUE
A mixture can be classified as a solution, a suspension, or a colloid based on the size of its ______ particles.
largest
TRUE or FALSE: Nitrogen is a more reactive element than oxygen.
FALSE
TRUE or FALSE: Every sample of a pure substance has exactly the same composition and the same properties.
TRUE
The temperature at which a substance changes from a liquid to a gas.
boiling point
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