Chemical Reactions Quiz

What are the new substances formed in a chemical reaction called?

• Elements

• Products

• Compounds

• Reactants

What is the process that occurs when iron atoms in a bike combine with oxygen molecules from the air to produce rust?

• Condensation

• Sublimation

• Evaporation

• Oxidation

What is the difference between an atom and a molecule?

• An atom is a single element, while a molecule is a combination of elements

• An atom is a combination of elements, while a molecule is a single element

• An atom is a liquid, while a molecule is a gas

• An atom is a solid, while a molecule is a liquid

What is the purpose of using concrete visual models in teaching chemical reactions?

• To distract students

• To reinforce the law of conservation

• To complicate the learning process

• To confuse students

What is a common misconception about chemical reactions?

• They are always reversible

• They are always irreversible

• They only occur in laboratories

• They only involve one substance

What is the balancing point in most chemical reactions?

• A starting point

• A midpoint

• A turning point

• An endpoint

What is the purpose of using ball and stick models in teaching chemical reactions?

• To distract students

• To confuse students

• To reinforce the law of conservation

• To complicate the learning process

What is the source of confusion regarding the reactants in a chemical reaction?

• The air is not involved in chemical reactions

• The air is made up of compounds

• The air is made up of atoms

• The air is made up of molecules

What is the overall picture of most chemical reactions, according to the beach analogy?

• Unpredictable

• Frozen

• Stable

• Chaotic

What is the purpose of using marshmallows to represent atoms in teaching chemical reactions?

• To complicate the learning process

• To reinforce the law of conservation

• To distract students

• To confuse students