Educational worksheet teaching the difference between common and proper nouns with an ocean-themed design.

Let's solve this step by step.

We are asked to determine whether the underlined word in each sentence is a common noun or a proper noun.

Definitions:

- Common noun: A general name for a person, place, thing, or idea (e.g., dog, city, book).
- Proper noun: A specific name for a person, place, thing, or idea — always capitalized (e.g., Sarah, Atlantic Ocean, Bahamas).

Now, let’s go through each sentence:

---

1. Sarah likes to swim in the ocean.
→ *Sarah* is a person's name → Proper noun
✔ P

2. Sea turtles are interesting animals.
→ *Turtles* is a general category of animals → Common noun
✔ C

3. The Atlantic Ocean is cold in the winter.
→ *Atlantic Ocean* is a specific body of water → Proper noun
✔ P

4. We saw a starfish on our trip.
→ *Trip* is a general event/activity → Common noun
✔ C

5. The ocean is very warm in the Bahamas.
→ *Bahamas* is a specific country/region → Proper noun
✔ P

6. Mary is afraid of sharks.
→ *Mary* is a person's name → Proper noun
✔ P

7. I hope we find a seashell.
→ *Seashell* is a general object → Common noun
✔ C

8. Watch out for stinging jellyfish!
→ *Jellyfish* is a general animal type → Common noun
✔ C

9. On Wednesday we go scuba diving.
→ *Wednesday* is a day of the week — days are proper nouns → Proper noun
✔ P

10. A colorful crab walked across the sand.
→ *Sand* is a general substance → Common noun
✔ C

---

Final Answers:

1. P
2. C
3. P
4. C
5. P
6. P
7. C
8. C
9. P
10. C

✔ All filled in correctly!