Read the following text and answer the following questions on the basis of the same:
Earth's magnetism: Earth's magnetic field is caused by a dynamo effect. The effect works in the same way as a dynamo light on a bicycle. Magnets in the dynamo start spinning when the bicycle is pedaled, creating an electric current. The electricity is then used to turn on the light. This process also works in reverse. If you have a rotating electric current, it will create a magnetic field. On Earth, flowing of liquid metal in the outer core of the planet generates electric currents. The rotation of Earth on its axis causes these electric currents to form a magnetic field which extends around the planet. The average magnetic field strength in the Earth's outer core was measured to be 25 Gauss, 50 times stronger than the magnetic field at the surface. The magnetic field is extremely important for sustaining life on Earth. Without it, we would be exposed to high amounts of radiation from the
Earth's outer core was measured to be 25 Gauss, 50 times stronger than the magnetic field at the surface. The magnetic field is extremely important for sustaining life on Earth. Without it, we would be exposed to high amounts of radiation from the Sun and our atmosphere would be free to leak into space. This is likely what happened to the atmosphere on Mars. As Mars doesn't have flowing liquid metal in its core, it doesn't produce the same dynamo effect. This left the planet with a very weak magnetic field, allowing for its atmosphere to be stripped away by solar winds, leaving it uninhabitable. Based upon the study of lava flows throughout the world, it has been proposed that the Earth's magnetic field reverses at an average interval of approximately 300,000 years. However, the last such event occurred some 780,000 years ago.
Average magnetic field strength in the Earth's outer core is:

Options

A. 5 Gauss
B. 25 Gauss
C. 500 Gauss
D. Cannot be measured

Explanation

To solve the question regarding the average magnetic field strength in the Earth's outer core, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Context**: The question is based on the provided text about Earth's magnetism. The text explains how the Earth's magnetic field is generated and its significance.

2. **Identify Key Information**: From the text, we note that the average magnetic field strength in the Earth's outer core is specifically mentioned.

3. **Extract the Relevant Data**: The text states: "The average magnetic field strength in the Earth's outer core was measured to be 25 Gauss."

4. **Compare with Given Options**: The options provided are:
- 5 Gauss
- 25 Gauss
- 500 Gauss
- Cannot be measured

5. **Select the Correct Answer**: Since the text clearly states that the average magnetic field strength in the Earth's outer core is 25 Gauss, we can conclude that this is the correct answer.

6. **Final Answer**: The average magnetic field strength in the Earth's outer core is **25 Gauss**.