Unit 2 vocab

The _________ is an explanation of how that particles in gases be have.

The _________ is the temperature at which a solid becomes a liquid.

The _____ is the energy required to change a substance from solid to liquid at its melting point.

The ______ of a liquid is the temperature at which the pressure of the vapor in the liquid is equal to the external pressure acting on the surface of the liquid.

The ________ is the amount of energy required for the liquid at its boiling point to become gas.

_______ is the process of a solid changing directly to a gas without forming a liquid.

_______ is matter that has enough energy to overcome not just the attractive forces between its particles but also the attractive forces within its atoms.

_________ is an increase in the size of a substance when the temperature increases.

_________ is the ability of a fluid (liquid or gas) to exert an upward force on an object immersed in it.

________ is the resistance of a fluid to flowing.

A _______ is a type of matter with a fixed composition.

An _______ is a substance made up of atoms that are alike.

A ________ is a substance in which the atoms of two or more elements are chemically combined in a fixed proportion.

A mixture in which different materials remain distinct is called a _____________________.

a ____________________ remains constantly and uniformly mixed.

a ________ is the same thing as a homogeneous mixture.

Any characteristic of a material that you can observe without changing the identity of the substance is a ______________________.

A change in size shape or state of matter in which the identity of the substance remains the same is called a _______________.

the process of separating substances Ina mixture by evaporating a liquid and recondensing its vapor is called ____________.

any characteristics of a material that you can observe that produces one or more new substances is a _____________.

a change of one substance to another is a ______________.

According to the ______________________________, the mass of all substances that are present before a chemical change ( reactants) equals the mass of all substances that remain after the change (products).