Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. Which of these is the best evidence that a chemical reaction occurs when coal burns?

Coal is made up of more than one element

What are Chemical Reactions?

a process in which atoms rearrange to form new substances

letter and numbers showing the types and number of atoms

Pat wants to create a chemical reaction between oil and water. He adds oil to a beaker of water and notices that the liquids do not mix. He then shakes the beaker and the drops of oil become suspended through the water for a few moments before returning to their separate layers. Did Pat succeed in creating a chemical change?

No, because no new substances were formed.

Yes, because the oil was evenly suspended.

Yes, because the solution was permanently changed.

The Statue of Liberty is made out of copper and was once shiny and copper-colored. Over the years, the copper has gone through a process called oxidation, where it has changed into a new material. What has occurred?

heat was released from the copper

Which of the following is a chemical reaction?

Atoms of the reactants rearrange to form a new substance

New atoms are formed when substances are mixed together

A solid material melts and becomes a liquid

A student dissolves 3 gram of sugar in 10 grams of water. She then determines the mass of the solution. What is the mass of the dissolved sugar and water?

13 grams because the substance is a mixture and the molecules are floating next to each other.

13 grams because a chemical reaction occurred making a new substance.

Less then 13 grams because the water absorbed the sugar.

More than 13 grams because the sugar absorbed the water.

Which of the following is true about the principle of the conservation of mass?

The mass of the products is equal to the mass of the reactants.

The mass of the products is never equal to the mass of the reactants.

The mass of the products is less than the mass of the reactants.

The mass of the products is greater than the mass of the reactants

Jay had two clear liquids in bottles. The mass of one liquid was 10.0 grams and the other was 7.0 grams. When he mixed them, a yellow solid formed and settled to the bottom of the bottle. He predicted that the liquid plus the solid would have more mass, so he put the bottle on a scale. The mass was 17.0 grams. Why did the mass not change?

Do to the Law of conservation of mass, matter cannot be created nor destroyed so the mass is the same as the reactant and the product.

Because it is a mixture and mass doesn't change.

He forgot to tare his bottle and the scale had the mass of the bottle added in.

Which statement is always true about conservation of matter?

The mass of a system does not change during a chemical reaction.

If a gas forms, the mass of a system decreases.

If a solid forms, the mass of a system increases.

The mass of a system changes when a substance changes from liquid to gas, but it does not change in a chemical reaction.

IQWST IC2 Lessons 6-12 Review

Authored by Hilary Cochran

Science

7th Grade

NGSS covered

Used 477+ times

AI Actions

Add similar questions

Adjust reading levels

Convert to real-world scenario

Translate activity

More...

Content View

Student View

21 questions

Show all answers

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A chemical reaction occurs when Kelly combines carbon dioxide (CO2) and water (H2O) together.
CO2 + H2O → H2CO3 ?
What is the product of the reaction?

H2O2 + CO2

H2CO3

H3CO2

H2O + CO2

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What best explains why electrolysis is a chemical reaction?

Electrolysis is a chemical reaction because it makes two new substances identical to water.

Electrolysis rearranges the atoms of water into two new substances with different properties than water.

Electrolysis boils water until the water vapor turns into new susbtances.

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

True or false: Electrolysis is a CHEMICAL reaction

True

False

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A chemical reaction occurs when Kelly puts carbon dioxide (CO2) and water (H2O) together.
H2O + CO2 → H2CO3 ?
What are the reactants?

H2O2 + CO2

H2CO3

H3CO2

H2O + CO2

Tags

NGSS.MS-PS1-1

MULTIPLE SELECT QUESTION

30 sec • 1 pt

What could be considered EVIDENCE of a chemical reaction? CHOOSE ALL THAT APPLY

Formation of bubbles

Change in color

Production of gas

Temperature change

Tags

NGSS.MS-PS1-2

MULTIPLE CHOICE QUESTION

30 sec • 12 pts

The substances at the beginning of a chemical equation are called the ____

product

yield

chemical symbol

reactants

Tags

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the arrow in a chemical equation...
H_{2 +}O --> H₂O

Reactants

Products

Yields/Forms/Produces

Chemical Equation

Access all questions and much more by creating a free account

Create resources

Host any resource

Get auto-graded reports

Continue with Google

Continue with Email

Continue with Classlink

Continue with Clever

or continue with

Microsoft

Apple

Others

Already have an account?

Similar Resources on Wayground

20 questions

Avaliação trimestral (7º ano)

Quiz

•

7th Grade

19 questions

Scientific Equipment

Quiz

•

7th Grade

20 questions

Grade 5 revision

Quiz

•

5th - 7th Grade

26 questions

Mickiewicz-Reduta. Świtezianka, Śmierć Pułkownika

Quiz

•

1st - 8th Grade

18 questions

Sources of Energy

Quiz

•

7th - 10th Grade

17 questions

Ecosystems & Interactions topics 1-3

Quiz

•

7th Grade

20 questions

Winds,Storms and Cyclones

Quiz

•

6th - 12th Grade

20 questions

Particle model pre and post test

Quiz

•

6th - 7th Grade

Popular Resources on Wayground

10 questions

5.P.1.3 Distance/Time Graphs

Quiz

•

5th Grade

10 questions

Fire Drill

Quiz

•

2nd - 5th Grade

20 questions

Equivalent Fractions

Quiz

•

3rd Grade

15 questions

Hargrett House Quiz: Community & Service

Quiz

•

5th Grade

20 questions

Main Idea and Details

Quiz

•

5th Grade

20 questions

Context Clues

Quiz

•

6th Grade

20 questions

Inferences

Quiz

•

4th Grade

15 questions

Equivalent Fractions

Quiz

•

4th Grade

Discover more resources for Science

19 questions

Introduction to Properties of Waves

Lesson

•

6th - 8th Grade

16 questions

Interactions within Ecosystems

Lesson

•

6th - 8th Grade

10 questions

Exploring the Layers of the Earth

Interactive video

•

6th - 10th Grade

20 questions

Electricity and Circuits

Quiz

•

7th Grade

16 questions

Photosynthesis and Cellular Respiration Review

Quiz

•

7th Grade

8 questions

VP #9: Amoeba Sisters Pedigrees

Interactive video

•

7th Grade

15 questions

Mitosis Amoeba Sister Video

Interactive video

•

7th Grade

20 questions

Food Webs + Energy Pyramids

Quiz

•

7th Grade

IQWST IC2 Lessons 6-12 Review

A chemical reaction occurs when Kelly combines carbon dioxide (CO2) and water (H2O) together.CO2 + H2O → H2CO3 ?What is the product of the reaction?

What best explains why electrolysis is a chemical reaction?

True or false: Electrolysis is a CHEMICAL reaction

A chemical reaction occurs when Kelly puts carbon dioxide (CO2) and water (H2O) together.H2O + CO2 → H2CO3 ?What are the reactants?

What could be considered EVIDENCE of a chemical reaction? CHOOSE ALL THAT APPLY

The substances at the beginning of a chemical equation are called the ____

What is the arrow in a chemical equation...H2 + O --> H2O

Which of the following models best demonstrates a balanced chemical equation?

Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. Which of these is the best evidence that a chemical reaction occurs when coal burns?

What are Chemical Reactions?

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science

A chemical reaction occurs when Kelly combines carbon dioxide (CO2) and water (H2O) together.
CO2 + H2O → H2CO3 ?
What is the product of the reaction?

A chemical reaction occurs when Kelly puts carbon dioxide (CO2) and water (H2O) together.
H2O + CO2 → H2CO3 ?
What are the reactants?

What is the arrow in a chemical equation...
H_{2 +}O --> H₂O