Fall Final Study Guide - 7th Grade

Front

What is the conservation of matter?

Back

Matter is conserved in chemical reactions; it cannot be created or destroyed.

Front

How many atoms are in the molecule below?

Back

26

Front

What are the steps of the engineering design method?

Back

Define the problem, conduct research, brainstorm solutions, choose the best solution, develop a prototype, test and evaluate, communicate results, and redesign.

Front

What do we call it when energy is absorbed?

Back

Endothermic

Front

What is the difference between a physical and chemical property?

Back

Physical properties can be observed without changing the substance's identity, while chemical properties can only be observed during a chemical change.

Front

What is an endothermic reaction?

Back

A reaction that absorbs energy from its surroundings.

Front

What is an exothermic reaction?

Back

A reaction that releases energy to its surroundings.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances.

Front

What is a molecule?

Back

A group of two or more atoms bonded together.