Chemical Reactions 7-MS-PS1-2

Fill in the blank: A chemical reaction is a process in which substances interact and form new substances with different ________.

• properties

• structures

• temperatures

• densities

Fill in the blank: Reactants are the ________ substances in a chemical reaction.

• starting

• ending

• resulting

• final

Products are the new substances formed as a result of a ________ reaction.

• chemical

• physical

• biochemical

• nuclear

Fill in the blank: A physical change is a change in a substance that does not alter its ________ identity.

• chemical

• physical

• atomic

• molecular

A chemical change is a change in which one or more substances form new substances with different ________.

• properties

• colors

• states

• structures

Evidence of a chemical reaction includes signs such as ________ change, gas production, and light production.

• color

• shape

• mass

• size

An endothermic reaction is a reaction that absorbs ________, making the surroundings cooler.

• heat

• cold

• pressure

• work

An exothermic reaction is a reaction that releases ________, making the surroundings warmer.

• heat

• cold

• radiation

• moisture

Fill in the blank: The conservation of mass is the principle that mass is neither created nor ________ in a chemical reaction.

• destroyed

• transformed

• disappeared

• absorbed

A substance is a form of matter with a specific chemical ________ and properties.

• composition

• integration

• structure

• formula