Chemical Reaction: Types of Chemical Reactions

In a synthesis or combination reaction, two or more substances combine to form________.

• Two new products

• A single product

A decomposition reaction is the _______ as a synthesis reaction.

• opposite

• same 

A decomposition reaction breaks down into _____ or more ______ substances.

• two, separate

• one, same

A combustion reaction shows that a chemical reaction is occuring because 

• there is heat.

• there are always ice cubes and cold

A single replacement reaction occurs when one _______ replaces another in a compound.

• element 

• compound 

What evidence of a chemical reaction do you observe in the picture?

• There are silver crystals forming on the wire.

• Fire is produced.

• Everything remains unchanged.

In a double replacement reaction, the ______ ion of one compound, replaces the _______ ion of the other compound, to form ____ new compounds. 

• negative, positive, one

• positive, negative, two 

• positive, positive, two