Indicators and Types Quick Check

In a chemical reaction, the ​ (a)   start the reaction and the ​ (b)   are the result.

• reactants
• products
• chemicals

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

In the lab, students mixed substances together and made observations. They wrote the following equations for their the experiment. Which of the following conclusions is valid?

• Result (i) indicates a chemical change because a change in color occurred

• Result (ii) indicates a chemical change because the products were in aqueous solution

• Result (ii) indicates a chemical change because of the formation of a precipitate

• Result (i) indicates a chemical change because a gas is one of the products

Tags

NGSS.MS-PS1-2

Based on the chemical equation below, what evidence suggests that a chemical reaction has occurred? (select 3)

• This equation shows the formation of a precipitate (solid)

• This equation shows the formation of water.

• This equation shows one or more substances changing into one or more new substances

• There is no evidence in this equation that a chemical reaction has occurred.

• This equation shows the formation of a gas

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What type of reaction is represented in the picture?

• synthesis

• decomposition

• single replacement

• double replacement

• combustion

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What type of reaction is represented in the picture?

• synthesis

• decomposition

• single replacement

• double replacement

• combustion

Tags

NGSS.MS-PS1-2