Unit Three Vocabulary Quiz

What is the term for a process that changes one substance into a new substance?

• Product

• Chemical Reaction

Answer explanation

A chemical reaction is a process that transforms one substance into a new substance, involving the breaking and forming of bonds. Therefore, the correct term for this process is 'Chemical Reaction'.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A substance or molecule that is an ingredient in a chemical reaction is called a ______.

• Reactant

• Product

Answer explanation

A substance or molecule that participates in a chemical reaction is called a reactant. Reactants are transformed during the reaction to form products, which are the substances produced as a result.

Tags

NGSS.MS-PS1-2

What is the substance created in a chemical reaction?

• Product

• Chemical Equation

Answer explanation

In a chemical reaction, the substances that are formed as a result are called products. The term 'chemical equation' refers to the representation of the reaction, not the substances created.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The Law of Conservation of Matter states that matter is not created nor destroyed in any ______.

• Chemical or Physical Change

• Chemical Reaction

Answer explanation

The Law of Conservation of Matter applies to both chemical and physical changes, indicating that matter is neither created nor destroyed in these processes. Therefore, 'Chemical or Physical Change' is the correct choice.

Tags

NGSS.MS-PS1-5

A change in a substance that does not change its identity and creates nothing new is called a ______.

• Physical Change

• Chemical Reaction

Answer explanation

A physical change is a transformation that alters a substance's appearance but not its chemical identity. Examples include changes in state, like melting or freezing, which do not create new substances.

What is a short way to show a chemical reaction using symbols?

• Chemical Equation

• Product

Answer explanation

A chemical equation is a concise way to represent a chemical reaction using symbols for reactants and products. It shows the transformation of substances, making it the correct choice for this question.

Tags

NGSS.MS-PS1-1

A reaction that absorbs energy in the form of heat, causing the temperature of surroundings to decrease, is known as a ______.

• Exothermic Reaction

• Endothermic Reaction

Answer explanation

A reaction that absorbs heat from its surroundings is called an endothermic reaction. This process results in a decrease in the temperature of the surroundings, distinguishing it from exothermic reactions, which release heat.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-6

What type of reaction releases energy in the form of heat, causing the temperature of surroundings to increase?

• Reactant

• Exothermic Reaction

Answer explanation

An exothermic reaction is a chemical process that releases energy in the form of heat, leading to an increase in the temperature of the surroundings. This distinguishes it from other types of reactions.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Bubbles form when two or more substances are combined ...

• Chemical Change

• Physical Change

Answer explanation

Bubbles form when two or more substances are combined, indicating a chemical reaction. This process involves the formation of new substances, which is characteristic of a chemical change, making 'Chemical Change' the correct answer.

Tags

NGSS.MS-PS1-2

Is burning wood a chemical or physical change?

• chemical

• physical

Answer explanation

Burning wood is a chemical change because it transforms the wood into new substances (ash, smoke, gases) through a chemical reaction with oxygen, releasing energy in the form of heat and light.

Tags

NGSS.MS-PS1-2