What is the definition of chemical change?

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

matter cannot be created or destroyed, only change form

changes affecting the form of a chemical substance, but not its chemical composition.

What is the definition of physical change?

changes affecting the form of a chemical substance, but not its chemical composition.

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

any property that is measurable, whose value describes a state of a physical system

Marie had a beaker with a small amount of baking soda. She added a few drops of pickle juice to the baking soda and observed fizzing and bubbling. Based on her observation, which of these can Marie determine about the new substance formed by mixing the baking soda and pickle juice?

A chemical reaction produced a gas.

A chemical reaction produced a solid.

No chemical reaction took place.

Only a physical change happened.

A substance is added to a liquid. Which of the following would provide evidence to suggest a chemical change has taken place?

The granules dissolve completely.

The volume of the liquid increases.

The granules seem to get smaller.

The red numbers in the image below represent ________

I don't know, and don't want to try

None of the answers are correct

What does the Law of Conservation of Mass state?

Matter cannot be gained or lost in a chemical reaction.

Matter can only be lost in a chemical reaction.

Matter can only be gained in a chemical reaction.

Matter can be gained and lost in a chemical reaction.

What will have more mass when a chemical change is complete? The reactants before the chemical reaction, or the product after the reaction is complete?

They both will have the same mass

The product always has more mass than the reactant

The reactant will have more mass than the product

They both will loose mass after the reaction

A chemical reaction is balanced when:

both sides have the same number and type of atoms

both sides have the same elements

both sides have the same subscripts

both sides have the same coefficients

A chemical equation tells us:

the reactants and the products.

the elements that make up the reactants and the products.

the number of atoms that make up the reactants and the products.

Which of the following reactions is balanced?

None of the chemical equations are balanced.

Which equation is balanced?

Na 3 PO 4 + 3KOH ---> 3NaOH + K 3 PO 4

2Na 3 PO 4 + 2KOH ---> 3NaOH + K 3 PO 4

Na 3 PO 4 + 2KOH ---> 2NaOH + K 3 PO 4

3Na 3 PO 4 + 3KOH ---> 3NaOH + K 3 PO 4

Which equation is balanced?

BaS + 2PtF 2 ---> 2BaF 2 + 2PtS

8.5DE - Chemical Reactions & Formulas

Quiz

•

Science

•

8th Grade

•

Practice Problem

•

Medium

•

NGSS

MS-PS1-2, MS-PS1-1, MS-PS1-5

+4

Standards-aligned

Gary Hartle

Used 150+ times

FREE Resource

58 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of the following describes a precipitate?

a liquid forms when a block of metal is heated

a solid forms when one liquid is poured into another

a gas forms when a solid is placed in a liquid

bubbles form when an acid is poured on a rock

Tags

NGSS.MS-PS1-2

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which is NOT an indication of a chemical change?

temperature change

formation of a precipitate

shape change

production of light

Tags

NGSS.MS-PS1-2

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What is the right part of a chemical equation called?
H_{2 +}O → H₂O

Reactants

Products

Yields

Chemical Equation

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The Law of Conservation of Mass states that -

the number and type of atoms on both sides of a chemical reaction are equal

there are more atoms on the reactant side than the product side

there are more atoms on the product side than the reactant side

the mass of the product will not equal the reactants

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

You know you a chemical reaction has occurred if:

there is a precipitate.

there is a permanent color change.

there is a temperature change.

All of these answers are evidence.

Tags

NGSS.MS-PS1-2

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

In the equation,
2Mg + O₂ ---> 2MgO, which are the reactants?

2Mg + O₂

2MgO

2Mg and MgO

O₂ and MgO

Tags

NGSS.MS-PS1-1

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

the product is doubled

the product is half the mass of the reactants

the mass is the same

the mass changes depending on the reaction

Tags

NGSS.MS-PS1-5

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8.5DE - Chemical Reactions & Formulas

58 questions

Which of the following describes a precipitate?

Which is NOT an indication of a chemical change?

What is the right part of a chemical equation called?
H_{2 +}O → H₂O

The Law of Conservation of Mass states that -

You know you a chemical reaction has occurred if:

In the equation,
2Mg + O₂ ---> 2MgO, which are the reactants?

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

Which of the following is a sign that a chemical reaction has occurred?

Is hammering wood together to build a house a chemical or physical change?

Is melting butter for popcorn a chemical or physical change?

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science

8.5DE - Chemical Reactions & Formulas

58 questions

Which of the following describes a precipitate?

Which is NOT an indication of a chemical change?

What is the right part of a chemical equation called?H2 + O → H2O

The Law of Conservation of Mass states that -

You know you a chemical reaction has occurred if:

In the equation, 2Mg + O2 ---> 2MgO, which are the reactants?

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

Which of the following is a sign that a chemical reaction has occurred?

Is hammering wood together to build a house a chemical or physical change?

Is melting butter for popcorn a chemical or physical change?

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science

What is the right part of a chemical equation called?
H_{2 +}O → H₂O

In the equation,
2Mg + O₂ ---> 2MgO, which are the reactants?