Which of the following is an example of a chemical change involving water?

Water is broken up to hydrogen and oxygen using electricity.

Liquid water freezes to become ice.

Ice changes from a solid to a gas.

Which of the following is true?

Chemical changes always cause a new substance to form.

In chemical changes the mass is greater in the reactants than the products.

Chemical changes always involve a change in state of matter.

Chemical changes happen more often than physical changes.

Which of the following is not true when referring to the Law of Conservation of Mass?

The coefficients in the reactants must be the same as the coefficients in the products.

The mass of the reactants must be the same as the products.

The elements in the reactants must be the same as the elements in the products.

The amount of atoms in the reactants must be the same as the amount of atoms in the products.

A chemical change is different than a physical change because in a chemical change...

A new substance is formed and in a physical change it is not.

Molecules do not physically touch.

The change can be seen and a physical change cannot.

In a chemical reaction....

The atoms of the reactants rearrange and re-bond to form the products.

The atoms in the reactants always stay together to form the products.

New atoms are formed which combine to make the products.

Some atoms disappear while others multiply to make the product.

A student mixed baking soda and vinegar and observed foaming and bubbles. The student concluded that ....

the bubbles indicated a chemical change was occurring.

the baking soda and vinegar were products of the reaction.

only a physical change was occurring.

The chemical formula for Ethanol is shown. How many atoms of each element are in one molecule of Ethanol?

2 carbon atoms, 6 hydrogen atoms, 1 oxygen atom

2 carbon atoms, 5 hydrogen atoms, 1 oxygen atom

4 carbon atoms, 3 hydrogen atoms, 6 oxygen atom

6 carbon atoms, 7 hydrogen atoms, 2 oxygen atom

Does the following equation follow the Law of Conservation of Mass (is it balanced)? N 2 + 3H 2 → 2NH 3

Yes, all elements have the same amount of atoms on both sides.

Yes, all elements are the same on both sides.

No, all elements are not the same on both sides.

No, all elements do not have the same amount of atoms on both sides

A chemist placed a piece of pink paper in a beaker. He placed the beaker over an open gas flame produced by a Bunsen burner. As the paper was heated, it turned black and produced smoke. Later, the flakes of paper crumbled and became ash. Which of the following observations about the burning paper does not provide evidence of a chemical reaction?

As the paper burned, it became smaller.

As the paper burned, it released black smoke.

As the paper burned, it transformed into ash.

As the paper burned, its color changed from pink to black.

Which of the following is true about an element and a compound?

An element cannot be broken down into simpler substances, but a compound can.

A compound cannot be broken down into simpler substances, but an element can.

Compounds are found everywhere, while elements are only found in certain places.

Elements are found everywhere, while compounds are only found in certain places.

Which of the following is the best example of a chemical change?

A student left his father's wrench outside and it rusted.

A tree is chopped in to firewood.

A student uses temporary hair dye on Halloween to turn their hair red.

Water was placed in dry ice and froze.

Which of the following best describes the Law of Conservation of Mass?

Mass can neither be created nor destroyed.

Mass must be conserved for survival

The amount of mass in the Universe is always changing.

Mass needs to be conserved for energy efficiency.

Chemistry -- 8th Grade Science Review

Quiz

•

Chemistry

•

8th Grade

•

Practice Problem

•

Hard

•

NGSS

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

+2

Standards-aligned

Christine Goffinet

Used 257+ times

FREE Resource

40 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which statement best describes evidence that a chemical reaction occurs as a cake bakes?

The water in the cake batter evaporates.

The cake rises as gas bubbles form in the baking cake.

The cake takes the shape of the container in which it is baked;

The water in the cake batter is used to keep the cake moist as it bakes.

Tags

NGSS.MS-PS1-2

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following best describes a physical change?

Wood changes color as it burns.

A solid forms from two liquids.

Bubbles form in boiling water.

A matchstick burning.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many atoms of Oxygen are in the chemical formula for glucose C₆H₁₂O₆?

6

12

18

24

Tags

NGSS.MS-PS1-1

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many elements are in the chemical formula CH₃CO₂?

1

3

4

7

Tags

NGSS.MS-PS1-1

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A chemical formula shows all of the following except....

the chemical symbols of the element

the number of atoms of each element

the elements found in a compound

the number of protons in a nucleus

Tags

NGSS.MS-PS1-1

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the term for the number 8 in the following chemical formula 2C₈H₁₈ ?

Reactant

Product

Coefficient

Subscript

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

All of the following are evidence of a chemical reaction except....

Production of a gas

Formation of a precipitate

Change in the shape of the matter

Change in the temperature of the matter

Tags

NGSS.MS-PS1-2

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Chemistry -- 8th Grade Science Review

40 questions

Which statement best describes evidence that a chemical reaction occurs as a cake bakes?

Which of the following best describes a physical change?

How many atoms of Oxygen are in the chemical formula for glucose C₆H₁₂O₆?

How many elements are in the chemical formula CH₃CO₂?

A chemical formula shows all of the following except....

What is the term for the number 8 in the following chemical formula 2C₈H₁₈ ?

All of the following are evidence of a chemical reaction except....

All of the following are examples of a chemical compound except....

All of the following are examples of elements except...

What is the appropriate subscript for hydrogen?

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Chemistry

Chemistry -- 8th Grade Science Review

40 questions

Which statement best describes evidence that a chemical reaction occurs as a cake bakes?

Which of the following best describes a physical change?

How many atoms of Oxygen are in the chemical formula for glucose C6H12O6 ?

How many elements are in the chemical formula CH3CO2?

A chemical formula shows all of the following except....

What is the term for the number 8 in the following chemical formula 2C8H18 ?

All of the following are evidence of a chemical reaction except....

All of the following are examples of a chemical compound except....

All of the following are examples of elements except...

What is the appropriate subscript for hydrogen?

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Chemistry

How many atoms of Oxygen are in the chemical formula for glucose C₆H₁₂O₆?

How many elements are in the chemical formula CH₃CO₂?

What is the term for the number 8 in the following chemical formula 2C₈H₁₈ ?