Copy of Classifying Change - Models (English) (5/28/2026)

Last updated about 1 month ago

19 Nsɛmmisa

1.5

2.5

Want an "A"?

At this point, the prior questions were worth a total of 26 points, or 89% of the points of this activity. If you want a score higher than that, you must successfully attempt the next question.

Warning - if it is obvious to me that your words are not your own, I will disregard your answer.

Copy of Classifying Change - Models (English) (5/28/2026)

Last updated about 1 month ago

19 Nsɛmmisa

Changes occur around us constantly. A friend may choose to stop communicating with you, your favorite shoes might no longer fit, or your class schedule might differ from last year's. When we reflect on these changes, we often classify them as either positive or negative. However, sometimes it's difficult to determine which label is more appropriate.

Similarly, chemists categorize changes they observe into two main types: physical changes and chemical changes. Just as with personal changes, it can be challenging to decide which category is the most fitting. In this activity, we will examine data to learn how to identify a chemical change.

When comparing and contrasting common signs of a physical versus a chemical change, the following list of changes can be created:

Physical Change	Chemical Change
Change in Texture	Formation of a solid
Dissolving in a Liquid	Change in Temperature (Energy is absorbed or released)
Change in Shape	Change in Color
Change of State	Formation of a Gas
	New Odor
	Emission of Light
	Formation of New Substance
	Burning (combustion)

Table 1

	Process	Before Change	After Change
a	Milk Curdling	White	White
b	Tree Leaves Aging	Green	Yellow, Red, and Orange
c	Charcoal Burning	Black	Gray
d	Salt Dissolving in Water	Colorless	Colorless
e	Chocolate Melting	Brown	Brown
f	Water Evaporating	Colorless	Colorless

Table 2

	Process	Before Change	After Change
a	Milk Curdling	Liquid	Solid and Liquid
b	Tree Leaves Aging	Solid	Solid
c	Charcoal Burning	Solid	Solid and Gas
d	Salt Dissolving in Water	Solid and Liquid	Liquid
e	Chocolate Melting	Solid	Liquid
f	Water Evaporating	Liquid	Gas

Table 3

	Process	Before Change	After Change
a	Milk Curdling	No Odor	Very Sour Odor
b	Tree Leaves Aging	No Odor	No Odor
c	Charcoal Burning	No Odor	Smoky odor
d	Salt Dissolving in Water	No Odor	No Odor
e	Chocolate Melting	Chocolate	Chocolate
f	Water Evaporating	No Odor	No Odor

1.5

What is changed in the before and after column of each table above (this is not asking about a chemical or physical change)?

a.) Table 1

b.) Table 2

c.) Table 3

1.5

a.) Look at Table 1 and list each row that displays a color change:

b.) Look at Table 2 and list each row that displays a change of state:

c.) Look at Table 3 and list each row that displays a change of odor:

From the pattern revealed from Tables 1-3, select the best option for each statement at the left.

	Chemical change has occurred.	Chemical or physical change may have occurred.
When there is a color change. (Table 1)
When there is a change of state. (Table 2)
When there is a change in odor. (Table 3)

2.5

Examine the changes described in the table (Table 4) and determine which ones displays a chemical change.

Table 4

Process	Before Change	After Change
Water vapor condensing	Gas Colorless No odor	Liquid Colorless No odor
Propane burning	Liquid Colorless Rotten Egg Odor	Gas Colorless Odorless
Iron nail rusting	Smooth-Solid Silver-Gray Metallic Odor	Rough-Solid Red-Brown Odorless
Dry ice sublimating	Solid White No Odor	Gas White/Colorless No Odor
Copper pipe corroding	Solid Red-Brown Odorless	Solid-Flaky Blue-Green Odorless

Process

Before

Change

After

Change

Is this a

Chemical

Change (Yes or No)?

Water

vapor

condensing

Gas

Colorless

No odor

Liquid

Colorless

No odor

Propane

burning

Liquid

Colorless

Rotten Egg Odor

Gas

Colorless

Odorless

Iron nail

rusting

Smooth-Solid

Silver-Gray

Metallic Odor

Rough-Solid

Red-Brown

Odorless

Dry ice

sublimating

Solid

White

No Odor

Gas

White/Colorless

No Odor

Copper

pipe

corroding

Solid

Red-Brown

Odorless

Solid-Flaky

Blue-Green

Odorless

2.5

a.) Find all of the molecules in the key.
b.) Draw a box around each molecule.
Tip - click the "Rectangle, Polygon, Circle" button next to the "Scribble" button, then select, "Rectangle." Use that tool to box in your answers.

Chemists refer to the concept of a chemical reaction to characterize the chemical changes discussed and modeled in Tables 1-3. This term - chemical reaction - is also able to be applied to the changes outlined in Table 6, where various types of particles are present following the changes.
Based upon the above sentences, and what you have examined in the prior tables (1-6), when attempting to define, "chemical reaction," which data would be more powerful or useful to you?

observational data of changes (Don't know what this is? See the hint.)

particle diagrams of changes (Don't know what this is? See the hint.)

Using your own words, and using everything you have done, examined, and read on this activity (do not use any other source) - define the term "chemical reaction."

2.5

Want an "A"?

At this point, the prior questions were worth a total of 26 points, or 89% of the points of this activity. If you want a score higher than that, you must successfully attempt the next question.

Warning - if it is obvious to me that your words are not your own, I will disregard your answer.

Look around your home or just outside of your home. Provide a list of three things you have noticed undergoing a change. With each, identify whether this change would be a chemical or physical change. Then provide evidence for your observations (descriptions, etc.) that would support your answer.

Before Change	Description of Change	After Change	Different or Same Types?
	Joining pop-beads together
	Spacing out the pop-beads
	Swapping pop-bead heads
	Mixing up the pop-beads
	Pulling pop-bead head off body

Before Change	Description of Change	After Change
	Joining pop-beads together
	Spacing out the pop-beads
	Swapping pop-bead heads
	Mixing up the pop-beads
	Pulling pop-bead head off body

Before Change	Description of Change	After Change
	Joining pop-beads together
	Spacing out the pop-beads
	Swapping pop-bead heads
	Mixing up the pop-beads
	Pulling pop-bead head off body

Before Change	Description of Change	After Change	Different or Same Types?
	Joining pop-beads together
	Spacing out the pop-beads
	Swapping pop-bead heads
	Mixing up the pop-beads
	Pulling pop-bead head off body

Before Change	Description of Change	After Change
	Joining pop-beads together
	Spacing out the pop-beads
	Swapping pop-bead heads
	Mixing up the pop-beads
	Pulling pop-bead head off body

Copy of Classifying Change - Models (English) (5/28/2026)

Want an "A"?

Copy of Classifying Change - Models (English) (5/28/2026)

From the pattern revealed from Tables 1-3, select the best option for each statement at the left.

a.) Find all of the molecules in the key.
b.) Draw a box around each molecule.
Tip - click the "Rectangle, Polygon, Circle" button next to the "Scribble" button, then select, "Rectangle." Use that tool to box in your answers.

Using your own words, and using everything you have done, examined, and read on this activity (do not use any other source) - define the term "chemical reaction."

Want an "A"?

Look around your home or just outside of your home. Provide a list of three things you have noticed undergoing a change. With each, identify whether this change would be a chemical or physical change. Then provide evidence for your observations (descriptions, etc.) that would support your answer.

From the pattern revealed from Tables 1-3, select the best option for each statement at the left.

Use the key for identifying the parts used in Table 5 for this question.
Explain the differences between a cat and a dat.

Examine the descriptions of change in Table 5 (below). Which types of changes might occur to a Dat?
Table 5
Before Change
Description
of Change
After Change
Joining pop-beads
together
Spacing out
the pop-beads
Swapping
pop-bead heads
Mixing up
the pop-beads
Pulling pop-bead
head off body

Examine the descriptions of change in Table 5 (below). Which types of changes might occur to a Cog?
Table 5
Before Change
Description
of Change
After Change
Joining pop-beads
together
Spacing out
the pop-beads
Swapping
pop-bead heads
Mixing up
the pop-beads
Pulling pop-bead
head off body

a.) Find all of the molecules in the key.
b.) Draw a box around each molecule.
Tip - click the "Rectangle, Polygon, Circle" button next to the "Scribble" button, then select, "Rectangle." Use that tool to box in your answers.

a.) Identify a carbon atom and a carbon dioxide molecule in the key.
b.) Describe the difference between them.

Using your own words, and using everything you have done, examined, and read on this activity (do not use any other source) - define the term "chemical reaction."

Look around your home or just outside of your home. Provide a list of three things you have noticed undergoing a change. With each, identify whether this change would be a chemical or physical change. Then provide evidence for your observations (descriptions, etc.) that would support your answer.

Copy of Classifying Change - Models (English) (5/28/2026)

Want an "A"?

Copy of Classifying Change - Models (English) (5/28/2026)

From the pattern revealed from Tables 1-3, select the best option for each statement at the left.

a.) Find all of the molecules in the key.b.) Draw a box around each molecule.Tip - click the "Rectangle, Polygon, Circle" button next to the "Scribble" button, then select, "Rectangle." Use that tool to box in your answers.

Using your own words, and using everything you have done, examined, and read on this activity (do not use any other source) - define the term "chemical reaction."

Want an "A"?

Look around your home or just outside of your home. Provide a list of three things you have noticed undergoing a change. With each, identify whether this change would be a chemical or physical change. Then provide evidence for your observations (descriptions, etc.) that would support your answer.

From the pattern revealed from Tables 1-3, select the best option for each statement at the left.

Use the key for identifying the parts used in Table 5 for this question.Explain the differences between a cat and a dat.

Examine the descriptions of change in Table 5 (below). Which types of changes might occur to a Dat?Table 5Before ChangeDescriptionof ChangeAfter ChangeJoining pop-beadstogetherSpacing outthe pop-beadsSwapping pop-bead headsMixing upthe pop-beadsPulling pop-beadhead off body

Examine the descriptions of change in Table 5 (below). Which types of changes might occur to a Cog?Table 5Before ChangeDescriptionof ChangeAfter ChangeJoining pop-beadstogetherSpacing outthe pop-beadsSwapping pop-bead headsMixing upthe pop-beadsPulling pop-beadhead off body

a.) Find all of the molecules in the key.b.) Draw a box around each molecule.Tip - click the "Rectangle, Polygon, Circle" button next to the "Scribble" button, then select, "Rectangle." Use that tool to box in your answers.

a.) Identify a carbon atom and a carbon dioxide molecule in the key. b.) Describe the difference between them.

Using your own words, and using everything you have done, examined, and read on this activity (do not use any other source) - define the term "chemical reaction."

Look around your home or just outside of your home. Provide a list of three things you have noticed undergoing a change. With each, identify whether this change would be a chemical or physical change. Then provide evidence for your observations (descriptions, etc.) that would support your answer.

a.) Find all of the molecules in the key.
b.) Draw a box around each molecule.
Tip - click the "Rectangle, Polygon, Circle" button next to the "Scribble" button, then select, "Rectangle." Use that tool to box in your answers.

Use the key for identifying the parts used in Table 5 for this question.
Explain the differences between a cat and a dat.

Examine the descriptions of change in Table 5 (below). Which types of changes might occur to a Dat?
Table 5
Before Change
Description
of Change
After Change
Joining pop-beads
together
Spacing out
the pop-beads
Swapping
pop-bead heads
Mixing up
the pop-beads
Pulling pop-bead
head off body

Examine the descriptions of change in Table 5 (below). Which types of changes might occur to a Cog?
Table 5
Before Change
Description
of Change
After Change
Joining pop-beads
together
Spacing out
the pop-beads
Swapping
pop-bead heads
Mixing up
the pop-beads
Pulling pop-bead
head off body

a.) Find all of the molecules in the key.
b.) Draw a box around each molecule.
Tip - click the "Rectangle, Polygon, Circle" button next to the "Scribble" button, then select, "Rectangle." Use that tool to box in your answers.

a.) Identify a carbon atom and a carbon dioxide molecule in the key.
b.) Describe the difference between them.