Educational worksheet on the composition of matter, covering substances, mixtures, and colloids with interactive drag-and-drop elements.

Let’s go step by step to fill in the blanks using the words provided in each box.

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Section 1: Substances

Words available:
compound, laboratory, element, atoms, ninety, substances, ratio

Sentence 1:
“All matter is composed of tiny particles called ______.”
→ The basic building blocks of matter are atoms.

Sentence 2:
“If a sample of matter is composed of only one kind of atom, the sample is an ______.”
→ That’s the definition of an element.

Sentence 3:
“There are ______ elements that occur naturally.”
→ We know from science that about ninety elements occur naturally (the rest are man-made).

Sentence 4:
“Another twenty or so elements have been produced in the ______.”
→ Man-made elements are made in a laboratory.

Sentence 5:
“When two or more elements join together in the same ______, that new substance is called a ______.”
→ Elements combine in fixed proportions — that’s a ratio.
→ When they do, they form a compound.

Sentence 6:
“Elements and compounds are called ______.”
→ Both are pure forms of matter → substances.

✔ So for “Substances” section:
- atoms
- element
- ninety
- laboratory
- ratio
- compound
- substances

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Section 2: Mixtures

Words available:
heterogeneous mixture, properties, homogeneous, solution, ratio

Sentence 1:
“If a sample of matter is not a substance, it is a ______.”
→ If it’s not pure (not element or compound), it’s a mixture → but we need to pick from the list. The word “mixture” alone isn’t there — wait, look again: “heterogeneous mixture” is one option, but that’s too specific. Actually, re-read: the blank says “it is a ______”, and the word “mixture” is implied? Wait — no, looking at the word bank: “heterogeneous mixture” is listed as one term, but also “homogeneous”, “solution”, etc. Hmm.

Wait — actually, the first sentence should be filled with just “mixture”, but “mixture” isn’t in the box. Let me check again.

Looking back: the word box for Mixtures has:

heterogeneous mixture
properties
homogeneous
solution
ratio

But note: “heterogeneous mixture” is written as two words but probably meant as one term. However, the first blank says: “If a sample of matter is not a substance, it is a ______.”

The correct scientific term is “mixture”. But since “mixture” alone isn’t in the box, perhaps we’re supposed to use “heterogeneous mixture”? No — that doesn’t make sense because not all mixtures are heterogeneous.

Wait — maybe I misread. Let me look again at the original image description.

Actually, in the user’s text, under “Mixtures”, the word box includes:

heterogeneous mixture
properties
homogeneous
solution
ratio

But notice: “heterogeneous mixture” is likely intended as one entry, meaning you can use “heterogeneous mixture” as a phrase. But for the first blank, we need a general term.

Hold on — perhaps the first blank is simply “mixture”, and even though it’s not explicitly listed, maybe it’s implied? But that contradicts instructions.

Wait — let’s read carefully: the instruction says “Use the words in the box to fill in the blanks.” So every blank must be filled with a word/phrase FROM the box.

So for the first blank: “If a sample of matter is not a substance, it is a ______.”

What’s left? The only general term might be... actually, none say just “mixture”. Unless… perhaps “heterogeneous mixture” is not meant to be used as a single unit? Maybe it’s “heterogeneous” and “mixture” separate? But in the box it’s written as “heterogeneous mixture” on one line.

This is confusing. Let me think differently.

Perhaps the first blank is “mixture”, and since it’s not in the box, maybe I made a mistake.

Wait — looking back at the user’s input:

Under “Mixtures”, the box contains:

heterogeneous mixture
properties
homogeneous
solution
ratio

But in many worksheets, “mixture” is understood, and here the first blank is defining what a non-substance is — which is a mixture. Since “mixture” isn’t in the box, perhaps the worksheet expects us to realize that “heterogeneous mixture” is not the answer for the first blank.

Alternative approach: maybe the first blank is “mixture”, and it’s missing from the box? But that can’t be.

Wait — let’s skip and come back.

Sentence 2:
“The parts of a mixture have no certain ______ to each other...”
→ In mixtures, components don’t have fixed ratios → so ratio.

Sentence 3:
“...and each part of the mixture has its own ______.”
→ Each component keeps its own properties.

Sentence 4:
“When the substances of a mixture are not spread out evenly, it is a ______ mixture.”
→ Not evenly spread = heterogeneous (but the box says “heterogeneous mixture” — perhaps we can use “heterogeneous” alone? Or maybe the blank is for “heterogeneous” and “mixture” is already in the sentence?)

Look: “it is a ______ mixture.” So the blank is an adjective. So we can use “heterogeneous” from “heterogeneous mixture” — assuming we can split it? But the box lists it as one item.

This is problematic. Perhaps in context, “heterogeneous mixture” is meant to be used when the full phrase is needed, but here since “mixture” is already in the sentence, we just put “heterogeneous”.

Similarly, next sentence: “If the mixture’s substances are spread evenly throughout, it is a ______ mixture.” → homogeneous

Then: “Another name for a homogeneous mixture is a ______.” → solution

Now back to first blank: “If a sample of matter is not a substance, it is a ______.”

The only logical answer is “mixture”, but it’s not in the box. Unless… wait, in the box, “heterogeneous mixture” is listed, but perhaps for this blank, we are to understand that “mixture” is implied, and we leave it? No.

Another idea: perhaps “mixture” is not in the box because the first blank is to be filled with “heterogeneous mixture”? But that’s incorrect because not all non-substances are heterogeneous mixtures.

I think there might be a typo or oversight in the worksheet, but based on standard knowledge:

- Non-substance = mixture
- But since “mixture” isn’t in the box, and “heterogeneous mixture” is, perhaps for the first blank, we use “mixture” anyway? But that violates the rule.

Wait — let’s count the blanks in the Mixtures section:

There are 6 blanks:

1. it is a ______.
2. no certain ______ to each other
3. has its own ______.
4. it is a ______ mixture.
5. it is a ______ mixture.
6. is a ______.

And words: heterogeneous mixture, properties, homogeneous, solution, ratio — that’s 5 items, but one is two words.

Perhaps “heterogeneous mixture” counts as one word for one blank, and others are single.

Blanks 4 and 5 both end with “mixture”, so for blank 4: “heterogeneous” (from “heterogeneous mixture”), blank 5: “homogeneous”

Then blank 6: “solution”

Blank 2: “ratio”

Blank 3: “properties”

That leaves blank 1: what to put? Only “heterogeneous mixture” is left, but that would be wrong.

Unless... perhaps the first blank is “mixture”, and it's assumed, or maybe I missed something.

Another thought: in some contexts, "mixture" is the term, and since it's not in the box, perhaps the worksheet has a mistake. But for the sake of completing, let's assume that for blank 1, we use "mixture" even if not in box — but that's against rules.

Wait — looking back at the user's text: under "Mixtures", the box has:

heterogeneous mixture
properties
homogeneous
solution
ratio

But "heterogeneous mixture" might be intended for a different blank. Let's list the sentences again:

"If a sample of matter is not a substance, it is a ______." → This must be "mixture". Since it's not in the box, perhaps it's a trick, or maybe "mixture" is part of "heterogeneous mixture", but that doesn't help.

Perhaps the first blank is "heterogeneous mixture", but that's scientifically inaccurate.

I recall that in some curricula, they might say "a mixture" and then specify types, but here, let's check online or standard answers.

Upon second thought, perhaps the word "mixture" is not in the box because the first blank is to be filled with "mixture", and it's omitted by mistake, but for this exercise, we'll proceed with logic.

Maybe "substances" is used, but no.

Another idea: perhaps "ratio" is for blank 1? No.

Let's move to the third section and come back.

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Section 3: Solutions, Suspensions, and Colloids

Words available:
colloid, suspension, Brownian motion, colloid, Tyndall effect

Note: "colloid" appears twice, so we can use it twice.

Sentence 1:
"Particles are very small and never separate from solutions." — this is given.

Sentence 2:
"A heterogeneous mixture, in which particles are visible and settle out by gravity, is called a ______."
→ That’s a suspension.

Sentence 3:
"When the size of particles are in between those of a suspension and a solution, the mixture is a ______."
→ That’s a colloid.

Sentence 4:
"Dust and smoke are examples of a ______ because they scatter light..."
→ Again, colloid (since dust and smoke are colloids).

Sentence 5:
"The scattering of light in a colloid is called the ______."
→ Tyndall effect

Sentence 6:
"The random motion of particles in a colloid is known as ______."
→ Brownian motion

Perfect, that uses all words: suspension, colloid, colloid, Tyndall effect, Brownian motion.

Now back to Mixtures section.

We have 6 blanks, and 5 word entries, but one is "heterogeneous mixture" which is two words.

Blanks:

1. it is a ______. → should be "mixture", but not in box. Perhaps the worksheet intends for us to use "heterogeneous mixture" here, but that's wrong.

Wait — let's read the sentence again: "If a sample of matter is not a substance, it is a ______."

In science, it's "mixture". But since "mixture" isn't in the box, and "heterogeneous mixture" is, perhaps for this blank, we put "mixture" and assume it's implied, or maybe there's a mistake.

Another possibility: perhaps "substances" is used, but no.

Let's count the words in the box for Mixtures: there are 5 items listed, but "heterogeneous mixture" might be considered as one term for one blank.

Blanks in Mixtures section:

- Blank 1: after "it is a" — needs a noun. "mixture" is expected.

- Blank 2: "no certain ______" — "ratio"

- Blank 3: "has its own ______" — "properties"

- Blank 4: "it is a ______ mixture" — "heterogeneous" (so we take "heterogeneous" from "heterogeneous mixture")

- Blank 5: "it is a ______ mixture" — "homogeneous"

- Blank 6: "is a ______" — "solution"

Then for blank 1, what's left? "heterogeneous mixture" is partially used, but we have "heterogeneous" used in blank 4, so "mixture" is left? But "mixture" isn't a separate word.

Perhaps the box allows us to use "heterogeneous" and "mixture" separately, even though it's written together.

In many worksheets, "heterogeneous mixture" is listed as a phrase, but for filling blanks, you can use the adjective part when "mixture" is already in the sentence.

For blank 1, since it's "it is a ______", and no "mixture" in the sentence, we need the full term, but "heterogeneous mixture" is too specific.

I think there's an error, but for the sake of completing, let's assume that for blank 1, we use "mixture", and it's understood, or perhaps the worksheet has "mixture" in the box but it's not shown.

Looking back at the user's input: in the "Mixtures" box, it's written as:

heterogeneous mixture
properties
homogeneous
solution
ratio

But perhaps "mixture" is implied in the first blank, and we use "heterogeneous" for blank 4, etc.

Another idea: perhaps the first blank is "heterogeneous mixture", but that would be incorrect because not all mixtures are heterogeneous.

I recall that in some definitions, "mixture" is the general term, and then they classify.

Perhaps for blank 1, we leave it as "mixture", and since it's not in the box, but the instruction is to use words from the box, so maybe it's "solution"? No.

Let's search for standard answers online or think logically.

Upon reflection, I remember that in some textbooks, they say: "If it's not a pure substance, it's a mixture." And "mixture" is the term.

Since "mixture" is not in the box, but "heterogeneous mixture" is, perhaps for this worksheet, they want "heterogeneous mixture" for blank 1, but that's wrong.

Perhaps the first blank is "ratio"? No.

Let's look at the number of blanks and words.

In Mixtures section, there are 6 blanks.

Words provided: 5 items, but "heterogeneous mixture" can be split into two words for two blanks.

So perhaps:

- Blank 1: "mixture" — but not in box.

Unless "mixture" is part of "heterogeneous mixture", and we use "heterogeneous" for blank 4, and "mixture" for blank 1.

That makes sense! Even though it's written as "heterogeneous mixture" in the box, we can use "mixture" for blank 1 and "heterogeneous" for blank 4.

Similarly, in some worksheets, they list phrases but allow splitting.

So let's try that.

For Mixtures:

Blank 1: "mixture" (from "heterogeneous mixture")

Blank 2: "ratio"

Blank 3: "properties"

Blank 4: "heterogeneous" (from "heterogeneous mixture")

Blank 5: "homogeneous"

Blank 6: "solution"

Yes, that works, and "heterogeneous mixture" is used as two separate words for two different blanks.

Perfect.

So summary:

Substances:
1. atoms
2. element
3. ninety
4. laboratory
5. ratio
6. compound
7. substances

Mixtures:
1. mixture (from "heterogeneous mixture")
2. ratio
3. properties
4. heterogeneous (from "heterogeneous mixture")
5. homogeneous
6. solution

But "ratio" is used in both sections? In Substances, we used "ratio" for the fifth blank, and in Mixtures, for the second blank. Is that allowed? The words are per section, so yes, each section has its own word box, so "ratio" can be used in both if it's in both boxes, but in this case, "ratio" is in the Mixtures box, and in Substances box, "ratio" is also there.

In Substances box: "ratio" is listed.

In Mixtures box: "ratio" is also listed.

So it's fine to use "ratio" in both sections.

Similarly, in Mixtures, we're using "mixture" and "heterogeneous" from "heterogeneous mixture".

Now for the final answers.

Let's write them in order.

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Final Answer:

Substances Section:
1. atoms
2. element
3. ninety
4. laboratory
5. ratio
6. compound
7. substances

Mixtures Section:
1. mixture
2. ratio
3. properties
4. heterogeneous
5. homogeneous
6. solution

Solutions, Suspensions, and Colloids Section:
1. suspension
2. colloid
3. colloid
4. Tyndall effect
5. Brownian motion

Note: For Mixtures section, blank 1 is "mixture", which is derived from the phrase "heterogeneous mixture" in the word box, and blank 4 is "heterogeneous" from the same phrase. This is acceptable as the phrase provides both words.