Chemical Reactions in Science

What is the general term for the process in which one or more substances are changed into one or more new substances?

• chemical reaction

• emotional reaction

• biological reaction

• physical reaction

In a chemical reaction, what are the substances that react called?

• Reactants

• Products

• Solvents

• Catalysts

What is the term for the substances that are formed as a result of a chemical reaction?

• reactants

• products

• elements

• byproducts

What is the law that states that mass is conserved in a chemical reaction?

• Mass Conservation Law

• Law of Mass Preservation

• Law of Conservation of Mass

• Law of Mass Conservation

What is the term for a chemical reaction in which heat is released?

• thermodynamic

• exothermic

• exergonic

• endothermic

What is the term for a chemical reaction in which heat is absorbed?

• Heat-absorbing reaction

• Endothermic reaction

• Thermal reaction

• Exothermic reaction

What is the term for a substance that speeds up a chemical reaction without being consumed in the process?

• facilitator

• enhancer

• accelerator

• catalyst

What is the chemical symbol for water?

• H2

• H2O

• O2H

• HO2

What type of reaction occurs when two substances combine to form a single compound?

• Neutralization reaction

• Synthesis reaction

• Combustion reaction

• Decomposition reaction

What type of reaction occurs when a compound breaks down into two or more simpler substances?

• Single replacement reaction

• Acid-base reaction

• Decomposition reaction

• Combination reaction