How many of these periods belong to the Paleozoic era ? Cretacesous, Jurrasic, Triassic, Permian, Carboniferous, Devonian , Silurin

Options

A. 1
B. 2
C. 3
D. 4

Answer

To determine how many of the listed periods belong to the Paleozoic era, we can follow these steps:

1. **Identify the periods listed in the question**: The periods given are Cretaceous, Jurassic, Triassic, Permian, Carboniferous, Devonian, and Silurian.

2. **Understand the geological time scale**: The geological time scale is divided into several eras, including the Paleozoic era. The Paleozoic era is known for its ancient life forms and is subdivided into several periods.

3. **List the periods of the Paleozoic era**: The periods that belong to the Paleozoic era are:
- Cambrian
- Ordovician
- Silurian
- Devonian
- Carboniferous
- Permian

4. **Identify the periods from the question that belong to the Paleozoic era**:
- **Cretaceous**: Mesozoic era
- **Jurassic**: Mesozoic era
- **Triassic**: Mesozoic era
- **Permian**: Paleozoic era
- **Carboniferous**: Paleozoic era
- **Devonian**: Paleozoic era
- **Silurian**: Paleozoic era

5. **Count the periods that belong to the Paleozoic era**: From the above identification, the periods that belong to the Paleozoic era are Permian, Carboniferous, Devonian, and Silurian. This gives us a total of four periods.

6. **Conclusion**: Therefore, the answer to the question is that **four periods belong to the Paleozoic era**.