Interactions of Matter Test

A combination of symbols that show the ratio of elements in a compound is called ______________________.

• chemical equation
• chemical symbol
• chemical formula

Substances that are present after a chemical reaction are ________________________.

• products
• reactants
• subscripts

A reaction that absorbs energy in the form of heat is called an ________________________________.

• exothermic reaction
• physical reaction
• endothermic reaction

A reaction that releases energy in the form of heat is called an _______________________________.

• exothermic reaction
• physical reaction
• endothermic reaction

Principle that states that matter is not created or destroyed during a chemical reaction is ___________________________________.

• the 1st Law of conservation
• the 3rd law of conservation
• the law of conservation of mass

Substances that are present before a chemical reaction are ______________________________.

• products
• precipitates
• reactants

One or two letters used to represent an element is called a __________________________________.

• Chemical equation
• Chemical formula
• Chemical symbol

The number telling how many atoms are in a molecule or the ratio of elements in a compound is a ____________________. They are smaller and go behind the molecule.

• subscript
• coefficient
• formula

_______________________ use symbols and formulas to show chemical reactions.

• chemical reactions
• chemical change
• chemical equations

A change in matter that produces a new substance is called a _______________________.

• chemical change
• physical change
• chemical reaction