8th grade final exam

Front

Physical change

Back

A change that alters the form or appearance of a material but does not make the material into another substance.

Front

Which of the following best describes a chemical change?

Back

A change in which one or more substances break apart or combine to form new substances.

Front

Reactants in a chemical reaction

Back

The substances that react in a chemical reaction.

Front

What is a chemical equation?

Back

A shorthand method to describe a chemical reaction using chemical formulas and other symbols.

Front

Which type of reaction involves two or more elements or compounds combining to make a more complex substance?

Back

Synthesis reaction

Front

What is the difference between an exothermic and an endothermic reaction?

Back

Exothermic reactions release heat, while endothermic reactions absorb heat.

Front

If a chemical reaction forms a solid when two liquids are mixed, what is the solid called?

Back

Precipitate

Front

How does a double replacement reaction differ from a single replacement reaction?

Back

A double replacement reaction involves two elements in different compounds trading places, while a single replacement reaction involves one element replacing another in a compound.

Front

What does the Law of Conservation of Mass state in a chemical reaction?

Back

The number of atoms in the products must equal the number of atoms in the reactants.

Front

Which of the following is an indicator that a chemical change is taking place? Melting of ice, Color change, Breaking a stick, Dissolving sugar in water

Back

Color change