Active and Passive Voice Quiz: Identify whether each sentence is in active or passive voice, focusing on historical astronomical events and discoveries.

Problem Analysis:

The task involves identifying whether each sentence is written in the Active Voice or the Passive Voice. Here's a brief explanation of the two voices:

- Active Voice: The subject performs the action. The structure is typically: *Subject + Verb + Object*.
- Passive Voice: The subject receives the action. The structure is typically: *Subject + Be + Past Participle + By + Agent*.

Solution:

Let's analyze each sentence and determine whether it is in the Active Voice or Passive Voice.

---

#### 1. The heavens were studied by ancient astronomers.
- Structure: Subject (*The heavens*) + Be (*were*) + Past Participle (*studied*) + By + Agent (*ancient astronomers*).
- Analysis: This is in the Passive Voice because the subject (*The heavens*) is receiving the action, and the agent (*ancient astronomers*) is mentioned after "by."
- Answer: B (Passive)

---

#### 2. A solar eclipse was predicted by Thales of Miletus in 585 B.C.
- Structure: Subject (*A solar eclipse*) + Be (*was*) + Past Participle (*predicted*) + By + Agent (*Thales of Miletus*).
- Analysis: This is in the Passive Voice because the subject (*A solar eclipse*) is receiving the action, and the agent (*Thales of Miletus*) is mentioned after "by."
- Answer: B (Passive)

---

#### 3. Hipparchus established an observatory in the third century B.C.
- Structure: Subject (*Hipparchus*) + Verb (*established*) + Object (*an observatory*).
- Analysis: This is in the Active Voice because the subject (*Hipparchus*) is performing the action.
- Answer: A (Active)

---

#### 4. A supernova, or exploding star, was recorded by Chinese astronomers in 1054.
- Structure: Subject (*A supernova*) + Be (*was*) + Past Participle (*recorded*) + By + Agent (*Chinese astronomers*).
- Analysis: This is in the Passive Voice because the subject (*A supernova*) is receiving the action, and the agent (*Chinese astronomers*) is mentioned after "by."
- Answer: A (Passive)

---

#### 5. In 1543, a new theory was suggested by a Polish astronomer, Copernicus.
- Structure: Subject (*a new theory*) + Be (*was*) + Past Participle (*suggested*) + By + Agent (*a Polish astronomer, Copernicus*).
- Analysis: This is in the Passive Voice because the subject (*a new theory*) is receiving the action, and the agent (*a Polish astronomer, Copernicus*) is mentioned after "by."
- Answer: A (Passive)

---

#### 6. In this theory, Earth and other planets orbited the sun.
- Structure: Subject (*Earth and other planets*) + Verb (*orbited*) + Object (*the sun*).
- Analysis: This is in the Active Voice because the subject (*Earth and other planets*) is performing the action.
- Answer: A (Active)

---

#### 7. The use of Copernicus’s theory was forbidden by religious leaders until 1757.
- Structure: Subject (*The use of Copernicus’s theory*) + Be (*was*) + Past Participle (*forbidden*) + By + Agent (*religious leaders*).
- Analysis: This is in the Passive Voice because the subject (*The use of Copernicus’s theory*) is receiving the action, and the agent (*religious leaders*) is mentioned after "by."
- Answer: A (Passive)

---

#### 8. However, persons were convinced about Copernicus’s theory by the discoveries of other astronomers.
- Structure: Subject (*persons*) + Be (*were*) + Past Participle (*convinced*) + By + Agent (*the discoveries of other astronomers*).
- Analysis: This is in the Passive Voice because the subject (*persons*) is receiving the action, and the agent (*the discoveries of other astronomers*) is mentioned after "by."
- Answer: A (Passive)

---

#### 9. The law of universal gravitation was discovered by Sir Isaac Newton.
- Structure: Subject (*The law of universal gravitation*) + Be (*was*) + Past Participle (*discovered*) + By + Agent (*Sir Isaac Newton*).
- Analysis: This is in the Passive Voice because the subject (*The law of universal gravitation*) is receiving the action, and the agent (*Sir Isaac Newton*) is mentioned after "by."
- Answer: A (Passive)

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Final Answers:

1. B (Passive)
2. B (Passive)
3. A (Active)
4. A (Passive)
5. A (Passive)
6. A (Active)
7. A (Passive)
8. A (Passive)
9. A (Passive)

Boxed Final Answer:

\[
\boxed{
\begin{array}{ll}
1. & \text{B (Passive)} \\
2. & \text{B (Passive)} \\
3. & \text{A (Active)} \\
4. & \text{A (Passive)} \\
5. & \text{A (Passive)} \\
6. & \text{A (Active)} \\
7. & \text{A (Passive)} \\
8. & \text{A (Passive)} \\
9. & \text{A (Passive)} \\
\end{array}
}
\]