What is a chemical reaction?

When particles combine to make a new substance

When particles are separated by chemical means

When particles combine to make no new substance

When particles are separated by physical means

What do we see in a chemical equation due to Law of Conservation of Matter?

The elements will be equal on both sides

There will be more elements in the product than the reactant

There will be more elements in the reactant than the product

There will be no change in the molecules

Law of Conservation of Mass and Matter -

Matter is not created nor destroyed, but it can be changed from one form to another

Matter can be created and destroyed but it can also change from one form to another

Matter can be created and destroyed but cannot change from one form to another

Matter cannot be created nor destroyed and it cannot change from one form to another

In a chemical reaction where is the reactant found?

To the left of the arrow symbol

To the right of the arrow symbol

A reactant is not part of a chemical reaction

In a chemical reaction where is the product found?

To the right of the arrow symbol

To the left of the arrow symbol

A product is not part of a chemical reaction

What is conservation of mass and chemical equations?

The number of atoms of each element are equal in the reactants and the products

Mass can be created or destroyed in chemical reactions.

Chemical equations do not need to balance atoms.

Conservation of mass only applies to physical changes.

What is photosynthesis?

chemical reaction process that converts carbon dioxide and water into glucose and oxygen

chemical reaction process that converts glucose and oxygen into carbon dioxide and water

physical change of carbon dioxide and water into glucose and oxygen

Physical change of glucose and oxygen into carbon dioxide and water

In a chemical equation....

elements are rearranged but none were added or taken away

elements are created or destroyed

elements are added or taken away

elements are moved into new arrangements that either create or destroy new elements after the chemical reaction

Which describes evidence of chemical changes?

production of gas, light, sound, prepitate, permanent color change, or change in temp

Product of gas, food coloring change, change in temperature

Production of odor, unexpected color change, change in state of matter, sound production

Rusting of iron, bubbles, melting, color change, evaporation

What does it mean when a precipitate was formed?

A solid is formed from two liquids

A liquid is formed from two solids

A new solid is formed from a liquid and a solid.

A new color is formed from two liquids

When I use food coloring to change a cake color to green is this a chemical change?

No, it is not a permanent unexpected change

No, it is an unexpected color change

Yes it is an unexpected permanent color change

Yes it is permanently colored and you can't reverse it.

8th Unit 2 Review 2024

Quiz

•

Science

•

8th Grade

•

Practice Problem

•

Easy

•

NGSS

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

+3

Standards-aligned

Heather Richards

Used 5+ times

FREE Resource

28 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does a chemical formula identify?

The type of molecule

The temperature at which a substance melts.

The physical state of a substance.

The types and quantities of atoms in a molecule.

Tags

NGSS.MS-PS1-1

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How can I tell the elements in a chemical formula or equation?

Each capital letter means a new element

Each lower case letter means a new element

Each subscript means a new element

Each coefficient means a new element

Tags

NGSS.MS-PS1-1

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the Equation 4H₃O₂, Which of the following describes the number 4?

This is a coefficient and says how many molecules there are

This is a coefficient and says how many hydrogens there are

This is a subscript and says how many molecules there are

This is a subscript and says how many hydrogen there are

Tags

NGSS.MS-PS1-1

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

6CO₂, how many of each element is present?

Carbon - 6

Oxygen - 12

Carbon - 1

Oxygen - 2

Carbon - 6

Oxygen - 2

Carbon - 1

Oxygen - 12

Tags

NGSS.MS-PS1-1

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

How many of each element is present in 10C₂H₆OCO₂?

Carbon - 2

Hydrogen - 6

Oxygen - 2

Carbon - 21

Hydrogen - 6

Oxygen - 3

Carbon - 22

Hydrogen - 16

Oxygen - 21

Carbon - 30

Hydrogen - 60

Oxygen - 30

Tags

NGSS.MS-PS1-1

6.

CATEGORIZE QUESTION

2 mins • 12 pts

Categorize the following:

Groups:

(a) 1 molecule

,

(b) 2 molecules

,

(c) 3 molecules

,

(d) 4 molecules

4H₃NCH₃Br

2H₂O

3HBr

NH₄Cl

2Li₂O

4Li₂SO₄

3Al₂O₃

3C₂H₆

H₂O

4Li₂O

2MgCl₂

CO₂

Tags

NGSS.MS-PS1-1

7.

MATCH QUESTION

30 sec • 1 pt

Match the following chemical formulas/equations terms to their definitions

Products

The substances produced by a chemical reaction

Coefficient

Gives the number of atoms of each element

Subscript

The substances involved in a chemical reaction

Reactants

Gives the number of molecules

Tags

NGSS.MS-PS1-1

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8th Unit 2 Review 2024

28 questions

What does a chemical formula identify?

How can I tell the elements in a chemical formula or equation?

In the Equation 4H3O2, Which of the following describes the number 4?

6CO2, how many of each element is present?

How many of each element is present in 10C2H6OCO2?

Categorize the following:

Match the following chemical formulas/equations terms to their definitions

How many atoms are there TOTAL in:H2SO4

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science

In the Equation 4H₃O₂, Which of the following describes the number 4?

6CO₂, how many of each element is present?

How many of each element is present in 10C₂H₆OCO₂?

How many atoms are there TOTAL in:
H₂SO₄