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51 Cards in this Set

  • Front
  • Back

Define Chemistry

The composition, structure, and properties of matter and the changes they undergo.

Define Science

A system of knowledge and the methods you use to find that knowledge.

Examples of Homogeneous Mixtures

Sugar water, Salt water, Pool water

Examples of Heterogeneous Mixtures

Sand and water, Cookie Dough, Salsa

Properties can be observed or measured without changing the composition of the substances in the material.


Define Mass

Amount of matter in an object.

Define Weight

The measure of gravity on an object.

Define Volume

The amount of space that an object takes up.

Define Density

The ratio of a material's mass to its volume.

What is the density of pure water?

1 g/cm cubed

A(n) __________ is matter that cannot be broken down into simpler substances.


Symbol of Hydrogen


Symbol of Oxygen


Symbol of Sodium


Symbol of Gold


What two things do you need to know in order to calculate density?

Mass over Volume

We represent and identify elements on the periodic table by their __________


A(n) ________ is made of two or more elements chemically combined in a fixed proportion.


Properties of a substance can be used to _______ that substances.


Give an example of a phase change

Melting and Freezing

The building blocks of all matter are _________.


The force that holds two atoms together is a _________ bond.


If you landed on the moon, your _________ would be different but your _________ would stay the same.

Weight, Mass.

Give examples of Elements

Gold, Aluminum, Sodium, and Oxygen.

Give Examples of Compounds

Water, Vinegar, and Carbon Dioxide

Give examples of Solutions

Tea, Lemonade, and Syrup

Give examples of Suspensions

Sand and Water, Juices you have to shake, and blood

Give examples of Colloids

Fog and Milk

A(n) ___________ retains some of the properties of its original substances.


Give example of a chemical change

Fireworks, and bananas changing in color

____________ is a method used to separate the substances n a mixture based on boiling points.


Give some examples of physical properties

Viscosity, Hardness, and Conductivity

A compound is made of groups of chemically joined atoms called ___________


An element contains how many different types of atoms?


Give some examples of chemical properties

Flammability and Reactivity

Pure substances can be divided into to groups what are they?

Compounds and Elements

How do you know if something will float or sink in water?

If the object floats it is less then 1 and if it sinks it is more than 1.

The properties of a ___________ are NOT fixed and can vary.


A ___________ change occurs when some of the properties of a material change, but the substances in the material remain the same.


__________ is a method used to separate the substances in a mixture based on size of the particles.


A(n) __________ does NOT retain some of the properties of its original substances.


Give an example of a physical change

Cutting hair, breaking glass, and tearing paper

___________ properties can be observed only when the substances in a sample of matter are changing into different substances.


In a(n) ___________, atoms are held together by chemical bonds.


What are 3 indicators that a chemical change has taken place?

Change in color, production of gas, and formation of a percipatate.

Give the SI unit for mass


Give the SI unit for pounds


Give the SI unit for volume

Solid cm cubed Liquid mL

Give the SI unit for Density

g/cm cubed

A change that produces a new substance is a ___________ change.


Phase changes are a ___________ change.