Question

why is remote sensing useful to measure the magnitude of a forest fire?
it can be conducted by observers using cell phones.
it is a type of gis technology.
it is used to identify the cause of the forest fire.
it is an accurate predictor of how long the fire will last.
it allows those fighting the fire to monitor from a safe distance.

Explanation:

Remote sensing is a technology that uses sensors to gather information about an object or area from a distance. In the context of forest fires, it allows firefighters to monitor the fire's magnitude (size, spread, etc.) without being in close proximity, ensuring their safety.

• Option 1: Remote sensing is not typically conducted by observers using cell phones. It involves more specialized equipment and techniques.
• Option 2: Remote sensing and GIS (Geographic Information System) are related but distinct technologies. Remote sensing is used to collect data, while GIS is used to analyze and visualize it.
• Option 3: Remote sensing is mainly for measuring the magnitude (size, spread) of the fire, not for identifying its cause.
• Option 4: While remote sensing can provide data on the fire's current state, it is not an accurate predictor of how long the fire will last. That depends on many factors like weather, fuel availability, etc.
• Option 5: This is correct as remote sensing enables monitoring from a safe distance, which is crucial for firefighting operations.

Answer:

It allows those fighting the fire to monitor from a safe distance.