Grade 7 Spelling Worksheets - Free Printable

Let’s solve this step by step.

The worksheet is called “Reverse Look Up!” and the directions say:
> “Use the definitions below to write the correct word on the line.”

That means each numbered sentence gives a definition or description, and we need to figure out what vocabulary word fits that definition. The words are likely from a spelling or science unit — probably about animals, habitats, or ecosystems, since some clues mention “predator,” “prey,” “habitat,” etc.

We’ll go one by one.

---

1. A system of pipes used for carrying away wastewater in cities; might also refer to the network through which water flows underground.

This sounds like sewer. In cities, sewers carry away waste water. Sometimes people talk about “storm sewers” too. But note: it says “might also refer to the network... underground” — still points to sewer.

Wait — could it be “drainage”? No, drainage is more general. Sewer is specific to wastewater in cities.

But let’s check if there’s a better fit later. Hold onto “sewer”.

Actually — rereading: “A system of pipes... carrying away wastewater in cities” → definitely sewer.

---

2. To disrupt the normal functioning of something.

This is disturb. Like disturbing peace, or disturbing an ecosystem.

Could also be “disrupt” itself? But the clue says “to disrupt...” so the answer is probably the verb form — but “disturb” is simpler and matches grade level (CCSS L.7.2.B suggests 7th grade language).

Yes — disturb.

---

3. One of the two large, strong limbs attached to the back of many animals.

Hmm — “limbs attached to the back” — that would be hind legs? Or maybe “legs”? Too vague.

Wait — “two large, strong limbs attached to the back” — think of animals like deer, horses, dogs — their back legs are powerful.

But the word might be hind legs? That’s two words. Maybe just legs? Not precise.

Another thought: Could it be haunches? That’s a bit advanced.

Wait — perhaps it’s quarters? As in “hindquarters”? Still not quite.

Let me think differently. Maybe it’s limbs — but that’s too broad.

Hold on — maybe it’s feet? No.

Perhaps it’s paws? Only for some animals.

Wait — look at #4: “Another designation of an animal’s residence.” That’s habitat.

Back to #3 — maybe it’s hind legs, but since it’s a single blank, perhaps the intended word is legs? Unlikely.

Another idea: In biology, sometimes they say “posterior limbs” — no.

Wait — perhaps it’s thighs? No.

Let’s skip and come back.

---

4. Another designation of an animal’s residence.

That’s clearly habitat. An animal’s home environment.

✔ habitat

---

5. The place where freshwater meets saltwater.

That’s an estuary. Where rivers meet the ocean.

✔ estuary

---

6. Making a low continuous sound as you sing.

That’s humming. Like humming a tune.

✔ humming

---

7. Slowly moving along quietly.

That’s creeping or sneaking. But “slowly moving along quietly” — often used for animals or spies.

Common word: creep

But let’s see — could be stalk? Stalking is slow and quiet, usually for hunting.

“Creep” is more general.

In context of other words (like predator/prey), maybe stalk?

Wait — #8 is about predators being cautious — so maybe #7 is creep.

I think creep is safer.

✔ creep

---

8. The act of approaching prey with great caution; commonly associated with predators.

That’s definitely stalking. Predators stalk their prey.

✔ stalking

---

9. To move stealthily or silently toward someone or something.

Again, similar to above — but this is the verb form. “To move stealthily” — that’s sneak or creep.

But #7 was “slowly moving along quietly” — which could be creep.

#9 is “move stealthily or silently toward” — that’s sneak.

But let’s compare:

- #7: slowly moving along quietly → creep
- #9: move stealthily toward → sneak

Possible.

But maybe both are related. Let’s keep going.

---

10. When an individual behaves in ways that are inappropriate for his/her age.

That’s immature behavior. Or acting childish.

Word: immature

✔ immature

---

11. To protect something during transit or in a dangerous area.

That’s escort or guard.

“Protect during transit” — like escorting a prisoner or valuable item.

Also “in a dangerous area” — guarding.

But the word might be shield? Or safeguard?

More common: escort if it’s during movement.

But let’s see — perhaps protect itself? Too obvious.

Another word: convey? No.

I think escort fits best.

✔ escort

---

12. Having great skill or ability in a particular field.

That’s expert or skilled.

But “having great skill” — adjective form.

Word: proficient? Advanced.

Simpler: talented? Or adept?

Most straightforward: skilled

But let’s see — perhaps masterful? No.

I think expert can be used as adjective: “an expert swimmer”

But the blank is for a word describing the state — so skilled or proficient.

Given grade level, probably skilled

Wait — another possibility: accomplished

But I think skilled is fine.

Hold on — maybe it’s adept? Less common.

Let’s go with skilled for now.

✔ skilled

---

13. A sudden loud noise or burst of activity.

That’s commotion or uproar.

Or outburst.

“Burst of activity” — could be flurry.

But “sudden loud noise” — crash? Bang?

Too specific.

Better: commotion — covers both noise and activity.

✔ commotion

---

14. The outer layer of the Earth made up of soil and bedrock.

That’s the crust. Earth’s crust.

✔ crust

---

15. A group of animals living together in a social organization typically led by a dominant male or female.

That’s a pack (for wolves) or herd (for deer) or pride (for lions).

But the key phrase: “social organization typically led by a dominant male or female” — that describes many groups, but the most general term is group? Too vague.

Specific terms: pack, herd, pride, troop.

But the question doesn’t specify species — so maybe the intended word is colony? For ants or bees.

Or flock for birds.

Wait — “led by a dominant male or female” — that’s true for wolf packs (alpha), lion prides (male leader), elephant herds (matriarch).

So perhaps the word is herd? But not all herds have a single leader.

Another word: troop — for monkeys.

I think the most inclusive term taught in schools is pack — but let’s see.

Actually, in ecology, they often use social group — but that’s two words.

Perhaps the answer is family? No.

Wait — looking back at #1: sewer — that seemed off.

Maybe I missed something.

Let me list all answers so far:

1. sewer
2. disturb
3. ???
4. habitat
5. estuary
6. humming
7. creep
8. stalking
9. sneak
10. immature
11. escort
12. skilled
13. commotion
14. crust
15. ???

Now, reconsider #3: “One of the two large, strong limbs attached to the back of many animals.”

Ah! Wait — “one of the two” — so it’s singular. And “attached to the back” — so hind leg.

But what’s the word for a hind leg? In anatomy, it’s just “hind leg”, but perhaps the word is leg? Too broad.

Another thought: in some contexts, especially for quadrupeds, they call them hindquarters — but that’s plural and refers to the whole rear part.

Perhaps it’s thigh? No.

Wait — maybe it’s haunch? Singular of haunches.

Haunch = the hip and buttock region of an animal, especially when referring to meat, but also anatomically.

But is that common for 7th grade?

Perhaps the intended word is leg — but that seems too simple.

Let’s look at #15 again.

“A group of animals living together... led by a dominant male or female.”

The standard term in biology for such a group is a pack for carnivores, herd for herbivores, but there’s a general term: social group — not helpful.

Another word: clan? For hyenas or cats.

I recall that in some curricula, they use the word troop for primates, but again, not universal.

Wait — perhaps it’s colony — for insects or bats.

But colonies aren't always led by a dominant individual — e.g., ant colonies have queens, but not "dominant" in the same way.

Let’s think of the most common example: wolf pack — led by alpha pair.

Lion pride — led by males.

Elephant herd — led by matriarch.

So perhaps the word is herd — even though not all herds have leaders, it's commonly associated.

Or pack.

But let’s see if there’s a better fit.

Another idea: gang? No, too informal.

Perhaps the answer is group — but that’s weak.

Wait — I remember that in some textbooks, they use the term social unit — no.

Let’s search my memory: in 7th grade science, what word is used for animal groups with leadership?

Actually, upon second thought, the word might be pride — but only for lions.

No.

Perhaps it’s flock — for birds, but not typically led by a dominant individual.

I think the safest bet is pack, as it’s commonly taught with wolves.

But let’s check online or standard lists — wait, I can’t, but based on logic.

Another approach: look at the first letters or patterns.

Notice that many words start with S: sewer, disturb (no), habitat (no), estuary (e), humming (h), creep (c), stalking (s), sneak (s), immature (i), escort (e), skilled (s), commotion (c), crust (c), ?

Not helpful.

Let’s revisit #1.

“A system of pipes used for carrying away wastewater in cities; might also refer to the network through which water flows underground.”

Is there a word that fits both? “Sewer” does, but “might also refer to the network... underground” — that could be “aquifer” or “watershed”, but those don’t carry wastewater.

“Drainage system” — too long.

“Sewer” is correct.

But let’s consider: could it be “culvert”? No, culverts are for roads.

I think “sewer” is right.

Now for #3: perhaps it’s hind leg, but since it’s one word, maybe the answer is leg — but that doesn’t specify back.

Another idea: in some contexts, “quarter” is used for the hind part of an animal, like “hind quarter”.

But “one of the two large, strong limbs” — so it’s a limb, not the whole quarter.

Perhaps the word is paw — but paws are feet, not necessarily large and strong limbs.

I recall that in horse anatomy, they have “forelegs” and “hindlegs”, but again, two words.

Wait — maybe the word is limb — but that’s too general.

Let’s look at #9: “To move stealthily or silently toward someone or something.”

That could be sneak or creep, but #7 is “slowly moving along quietly” — which is also creep.

Perhaps #7 is creep and #9 is sneak.

For #3, let’s try to find a different angle.

“One of the two large, strong limbs attached to the back of many animals.”

What if it’s tail? No, tail is not a limb.

Limbs are legs or arms.

Attached to the back — so hind legs.

Perhaps the word is back leg — but again, two words.

I think there might be a mistake in my reasoning.

Another thought: in some animals, like kangaroos, the hind legs are very large, but still.

Perhaps the word is foot — no.

Let’s consider that the word might be haunch — defined as the hip and upper thigh of an animal, especially when slaughtered, but also anatomically.

And it’s singular, and “one of the two” — yes, animals have two haunches.

And haunches are large and strong in many animals.

So perhaps haunch.

But is that 7th grade level? CCSS L.7.2.B is about using commas correctly, but the content might be science vocab.

Perhaps it’s thigh — but thighs are part of the leg.

I found a better fit: in some educational materials, they use the word hindquarter for the rear part, but again, not a limb.

Let’s move to #15.

Upon reflection, the most appropriate word for a group of animals with social structure and leadership is pack for wolves, but since it's general, perhaps the answer is herd.

But let’s see the last one.

#15: “A group of animals living together in a social organization typically led by a dominant male or female.”

The word that fits this description across species is social group, but that’s not a single word.

Another word: colony — for ants, bees, termites — but they are led by a queen, who is dominant female.

For mammals, it’s pack, herd, etc.

Perhaps the intended word is troop — for baboons or chimpanzees.

But I think in many curricula, they use the word pack as the example.

Let’s assume it’s pack for now.

But let’s double-check #3.

I recall that in some worksheets, for "large strong limbs on the back", they use the word legs — but that’s not accurate.

Perhaps it’s paws — but paws are not limbs; they are feet.

Another idea: the word might be members — no.

Let’s think of the word appendage — too scientific.

Perhaps it’s extremity — no.

I think I need to accept that for #3, the word is hind leg, but since it's one blank, maybe it's leg and they imply hind.

But that’s poor.

Wait — let’s read the clue again: “One of the two large, strong limbs attached to the back of many animals.”

“Attached to the back” — so the limb is connected to the back part of the body.

In anatomy, the hind limbs are attached to the pelvis, which is part of the back.

So the word is hind limb — but again, two words.

Perhaps the answer is limb — and they mean hind limb by context.

But that’s ambiguous.

Let’s look for a different interpretation.

Another thought: in some contexts, "back legs" are called rear legs, but still.

Perhaps the word is quarter — as in "hind quarter", and "one of the two quarters".

And "quarter" can mean a section of the body.

For example, "the butcher cut the beef into quarters".

And for live animals, "hindquarters" are the rear part.

But the clue says "limbs", not "sections".

"Limbs" specifically means arms or legs.

So it must be a leg.

I think the only reasonable answer is leg, and we assume it's hind leg from context.

But let’s see if there’s a standard word.

Upon searching my knowledge, I recall that in some animal studies, they use the term hindfoot for the foot of the hind leg, but not the whole limb.

Perhaps for #3, the answer is paw — but paws are not large and strong limbs; they are the feet.

I give up for now; let’s list what we have and see if there’s a pattern.

Perhaps #1 is not "sewer".

Let’s re-read #1: “A system of pipes used for carrying away wastewater in cities; might also refer to the network through which water flows underground.”

“Might also refer to the network through which water flows underground” — that sounds like an aquifer or groundwater system, but aquifers don't carry wastewater; they are natural.

"Sewer" is man-made for wastewater.

But "network through which water flows underground" could be "sewer" if it's storm sewer or combined sewer.

I think "sewer" is correct.

Another possibility: "drain" — but drain is smaller.

"Conduit" — too technical.

I think "sewer" is fine.

For #3, let’s try haunch.

Definition of haunch: the hip and buttock region of an animal, especially when referring to the meat, but also the joint or the area.

And it's often used in the plural, but can be singular.

And "one of the two" — yes.

And "large, strong" — yes, in many animals.

So perhaps haunch.

For #15, let’s try colony — for social insects or bats.

But for mammals, it’s not typical.

Another word: gang — no.

Perhaps family — but not always led by dominant individual.

I recall that in ecology, the term for a group of animals with social hierarchy is social group, but again.

Let’s consider that the word might be pack for #15.

And for #3, leg.

But let’s look at the number of letters or something.

Perhaps the word for #3 is thigh — but thighs are not limbs; they are parts of limbs.

I think I found it: in some contexts, "hind leg" is referred to as back leg, but still.

Another idea: the word might be member — as in "a member of the body", but that’s archaic.

Perhaps it’s appendage — but that’s not common.

Let’s move on and finalize.

After careful thought, here are the best guesses:

1. sewer
2. disturb
3. haunch (or leg, but haunch is more precise for "large, strong")
4. habitat
5. estuary
6. humming
7. creep
8. stalking
9. sneak
10. immature
11. escort
12. skilled
13. commotion
14. crust
15. pack

For #3, upon second thought, "haunch" is not typically considered a "limb"; a limb is the entire leg, while haunch is the hip area.

So perhaps the intended word is leg, and we have to go with that.

In many elementary/middle school contexts, they might expect leg for simplicity.

Similarly, for #15, herd is more general than pack.

But "led by a dominant male or female" — herds of cattle may not have a single leader, while packs do.

Wolf packs have alphas, lion prides have males, elephant herds have matriarchs.

So perhaps herd is acceptable.

But let’s see the answer choices or standard vocabulary.

I recall that in some spelling lists, "pack" is included for animal groups.

For #9, "to move stealthily" — that’s sneak, and #7 "slowly moving along quietly" — creep.

For #11, "protect during transit" — escort is good.

For #12, "having great skill" — skilled is fine, but perhaps expert is better.

"Expert" can be an adjective: "an expert player".

And it’s common.

So maybe expert for #12.

Let’s change that.

Also for #13, "sudden loud noise or burst of activity" — commotion is good, but uproar is also possible.

"Commotion" is more common.

Now for #3, let’s try to find a different word.

What if it’s paw? But paws are not limbs; they are the distal part.

Another word: foot — same issue.

Perhaps the word is arm — but for back, it should be leg.

I think the only logical choice is leg, and assume it's hind leg.

So I'll go with that.

Final list:

1. sewer
2. disturb
3. leg
4. habitat
5. estuary
6. humming
7. creep
8. stalking
9. sneak
10. immature
11. escort
12. expert (changed from skilled)
13. commotion
14. crust
15. pack

For #15, let’s confirm: "a group of animals living together in a social organization typically led by a dominant male or female."

Wolf pack: led by alpha pair.

Lion pride: led by males.

Elephant herd: led by matriarch.

Gorilla troop: led by silverback.

So "pack" is specific to canines, "pride" to lions, "troop" to primates, "herd" to ungulates.

The most general term that implies leadership is pack in popular culture, but scientifically, there isn't a single word.

However, in many educational resources, they use "pack" as the example for such groups.

Perhaps the answer is colony for social insects, but they are not "typically led by a dominant male or female" — queens are females, but not "dominant" in the same way.

I think pack is the intended answer.

For #3, "leg" is the best we can do.

So here are the answers:

1. sewer
2. disturb
3. leg
4. habitat
5. estuary
6. humming
7. creep
8. stalking
9. sneak
10. immature
11. escort
12. expert
13. commotion
14. crust
15. pack

But let’s verify #12: "Having great skill or ability in a particular field."

"Expert" is perfect.

#9: "To move stealthily or silently toward" — "sneak" is correct.

#7: "Slowly moving along quietly" — "creep" is correct.

#8: "The act of approaching prey with great caution" — "stalking" is correct.

#11: "To protect something during transit" — "escort" is correct.

#13: "A sudden loud noise or burst of activity" — "commotion" is correct.

#14: "The outer layer of the Earth" — "crust" is correct.

#5: "Where freshwater meets saltwater" — "estuary" is correct.

#4: "Animal’s residence" — "habitat" is correct.

#2: "To disrupt" — "disturb" is correct.

#1: "System of pipes for wastewater" — "sewer" is correct.

#6: "Making a low continuous sound" — "humming" is correct.

#10: "Behaves inappropriately for age" — "immature" is correct.

#15: "Group of animals with leadership" — "pack" is acceptable.

#3: "One of the two large, strong limbs on the back" — "leg" is the only sensible single-word answer, even though it's not specific.

Perhaps in the context of the unit, they have a word like "hindleg" but it's usually hyphenated or two words.

I think we have to go with "leg".

So final answers:

1. sewer
2. disturb
3. leg
4. habitat
5. estuary
6. humming
7. creep
8. stalking
9. sneak
10. immature
11. escort
12. expert
13. commotion
14. crust
15. pack

But let’s write them in order.

Final Answer:
1. sewer
2. disturb
3. leg
4. habitat
5. estuary
6. humming
7. creep
8. stalking
9. sneak
10. immature
11. escort
12. expert
13. commotion
14. crust
15. pack