1. Ether
   Solid
2. Substance

Any matter with a fixed composition is known as a substance. Chemistry deals with different kinds of substances.

1. Homogenous mixture
2. Heterogeneous mixture

A heterogeneous mixture is one in which various materials can be detected. A homogenous mixture contains two or more substances that are blended evenly.

1. Detectable
2. Undetectable

A solution has particles that are so small that you can't even see them under a microscope. Solutions are often used in basic and complex chemistry.

1. Larger
2. Smaller

A colloid mixture has particles that are larger than a solution, but not big enough to settle out. Light scattered by colloidal particles is known​ as the Tyndall Effect.

1. Chemical change
   Internal change
2. Physical change

A physical change is a change in things that we can see, such as size, shape and state. People go through physical changes!

1. Chemical change
   Physical change
2. Property change

A chemical change is the simple change from one substance to another. The study of chemistry is the study of changes.

1. Solution​
   Ether
2. Matter

Kinetic theory is the explanation of how particles of matter behave. There are many different ways in which these particles can move and interact.

1. Melting pot
   Liquid point
2. Melting point

The melting point is the temperature at which a solid will begin to melt or liquify. Different solids have different melting points. You can observe the melting point when you witness ice beginning to thaw.

1. Gas
   Solid
2. Frozen

Heat of vaporization refers to the amount of energy needed for a liquid to become a gas. A liquid becomes a gas through evaporation.

1. Evaporation
   Flow
2. Freezing

A fluid with high viscosity won't move very fast. That's because it has a resistance to flow. Gravy often has a high viscosity.

1. Pascal
   Pendulum
2. Barium

The pascal is a measurement of pressure. it was defined by French mathematician Blaise Pascal.

1. Proton
   Neuron
2. Nucleus

The nucleus is the center of an atom. Protons are particles in the atom with a positive charge.

1. Yes
2. No

Unlike protons, the neutrons in an atom have no charge. Electrons, however, have a negative charge.

1. Kilts
   Qualms
2. Quarks

Quarks are the smaller particles within the neutrons and protons. Quarks can be a little quarky!

1. In the nucleus
   In the electron cloud
2. In the electron​ bubble

The electron cloud is where you'll find the electrons in an atom. The election cloud is an area that is around the nucleus.

1. Anatomic table
   Periodic table
2. Mesotomic table

The periodic table shows all the elements in order of atomic number. This table is indispensable in the study of chemistry.

1. Protons
   Neutrons
2. Electrons

The atomic number is the number of protons in an atom. The atomic number determines where the element is placed on the periodic table.

1. Electrons
   Quarks
2. Neutrons

The mass number is the sum of the number of protons and neutrons in the nucleus of an atom. Electrons don't matter!

1. Mesotopes
   Isotopes
2. Microtopes

Isotopes are atoms of the same element that have different numbers of neutrons. Isotopes can be seen on the periodic table.

1. Commas
   Ellipses
2. Periods

The horizontal rows of elements are known as periods. There are various periods on the periodic table.

1. Air
   Plant life
2. Metal

Metals are defined by their ability to conduct heat and electricity in a powerful manner. That's why we cook with metals!

1. Liquid
   Malleable
2. Viscuous

Something that can be hammered into a different shape is malleable. For instance, tin is quite malleable.

1. An ionic bond
   A chemical bond
2. A James Bond

A chemical bond is a force that holds atoms together in a compound. An ionic bond is an attraction between opposite charges.

1. Neutrons
   Electrons
2. Protons

A covalent bond is created when elements share electrons. Sharing electrons creates attraction between elements.

1. Molecule
   Cell
2. Amoeba

A molecule is formed when different atoms share electrons. This is done through a covalent bond.

1. A compound
   An element
2. A chemical

An element is composed of atoms that are all the same. The foundation of chemistry is the interaction of these elements.

1. A mixture
   An anomaly
2. A compound

A compound is formed when the atoms of two or more elements are combined. All elements interact differently with one another.

1. Sill
   Suspension
2. Extension

A heterogeneous mixture with liquid and visible particles that have settled is known as a suspension. It's like a fly sinking to the bottom of your water glass!

1. Distillation
   Intoxication
2. Fermentation

Distillation is the process by which substances are separated by evaporating the liquid. The vapor is then re-condensed.

1. Physical makeup
   Chemical property
2. Chemical format

The chemical property determines whether or not a substance can undergo chemical change. Basically, it's the governing characteristic of the substance.

1. Mass of fusion
   Heat of fusion
2. Melting fusion

The heat of fusion is the energy required to change a substance from a solid to a liquid. This happens at the melting point.

1. Boiling point
   Melting point
2. Heat of fusion

Simply put: the point at which liquid starts to boil is the boiling point. This is expressed as a certain temperature.

1. Strength
   Tenacity
2. Buoyancy

Buoyancy is the ability of fluid to exert an upward force on an object. This is when the object is submerged in the fluid.

1. Magnetism
   Pressure
2. Composition

Pressure is defined as the force exerted per area. This pressure can be represented as a formula.

1. Stands
   Parallels
2. Groups

The vertical columns in the periodic table are known as groups. Each element in a group has the same number of electrons in the outer orbit.