Yr 8 Chemistry vocabulary

Condensation

• a change of state from gas to solid

• a change of state from liquid to gas

• a change of state from solid to liquid

• a change of state from gas to liquid

Sublimation

• when a solid changes to a liquid

• when a new chemical forms after a reaction

• when a solid changes to a gas

• when a reaction gives off heat

Physical change

• the parts of a mixture remain unchanged

• substances are combined in a reaction

• a new substance is formed

• a solid becomes liquid

Contraction

• a disagreement between scientists

• something becomes smaller

• a liquid appears

• a new chemical appears

Precipitate

• a clear liquid formed after a reaction

• a reaction that occurs very rapidly

• a solid formed when a reaction occurs in a liquid

• a gas forming bubbles in a liquid after a reaction

Molecule

• part of an atom

• a group of atoms

• a mixture of atoms

• a type of atom

Exothermic

• a reaction that needs heat to start it

• a reaction that is made faster by adding heat

• a reaction that remains cold

• a reaction that produces heat

Mass

• the weight of a substance

• the amount of a substance

• the surface area of a substance

• the volume of a substance

Evaporation

• the amount of heat lost in a reaction

• the change from gas to liquid

• the space occupied by a substance

• a change that produces a new substance

Diffusion

• a change from liquid to gas

• mixing of two solids

• a chemical reaction requiring heat

• mixing of particles due to their own movement