Q: (SSC/0)
Consider the following activities :
1. Spraying pesticides on a crop field.
2. Inspecting the craters of active volcanoes.
3. Collecting breath samples from spouting whales for DNA analysis.
Q. At the present level of technology, which of the above activities can be successfully carried out by using drones ?
(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
question_subject:
Geography
question_exam:
SSC
stats:
0,70,32,6,6,70,20
keywords:
{'cinder cone': [1, 0, 0, 0], 'volcano': [0, 0, 1, 0], 'crater': [1, 0, 0, 0], 'epicentre': [1, 0, 0, 0], 'mouth': [3, 0, 2, 4], 'focus': [1, 0, 0, 5], 'cup': [1, 0, 0, 2]}
The correct answer is option 3, crater. A crater is a cup-shaped mouth or depression at the summit of a volcano. It is formed during volcanic eruptions when magma is ejected and the volcanic cone collapses inward, creating a large hollow. The shape of a crater can vary depending on the type of volcano and the size of the eruption. Craters can be shallow or deep, and they may contain a central vent or multiple vents where magma and gases are released. The crater serves as an outlet for volcanic activity and is often surrounded by steep walls. It is an important feature of a volcano that helps scientists study and monitor eruptions.