Volcanic eruptions can happen quickly. When an eruption occurs, there isnt much that can be done to slow its destructive force. Because of this, scientists are continuously working to improve their ability to predict eruptions. Better technology means evacuation warnings can be issued before its too late. Earthquakes caused by magma pushing up through the volcano are one indicator of an approaching eruption. Vibrations from these earthquakes can be detected by a device called a seismometer. Another sign a volcano may soon erupt is swelling of the volcano itself. As magma builds up, the magma chamber enlarges and changes the shape of the volcano. These changes can be identified by tilt meters, devices that measure the tilt of a structure. Gas release can also signal an eruption. Although changes in the atmosphere around a volcano tend to be small, scientists have developed devices to detect these minor changes. Predicting eruptions is all about safety. The sooner these indicators can be identified, the more time those who live near volcanoes will have to evacuate.With which of the following statements would the author of this passage most likely agree?

VOLCANOES

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

Volcanic eruptions can happen quickly. When an eruption occurs, there isn’t much that can be done to slow its destructive force. Because of this, scientists are continuously working to improve their ability to predict eruptions. Better technology means evacuation warnings can be issued before it’s too late. Earthquakes caused by magma pushing up through the volcano are one indicator of an approaching eruption. Vibrations from these earthquakes can be detected by a device called a seismometer. Another sign a volcano may soon erupt is swelling of the volcano itself. As magma builds up, the magma chamber enlarges and changes the shape of the volcano. These changes can be identified by tilt meters, devices that measure the tilt of a structure. Gas release can also signal an eruption. Although changes in the atmosphere around a volcano tend to be small, scientists have developed devices to detect these minor changes. Predicting eruptions is all about safety. The sooner these indicators can be identified, the more time those who live near volcanoes will have to evacuate.With which of the following statements would the author of this passage most likely agree?

A	Volcanic eruptions are impossible to predict and scientists are wasting their time.
B	Volcanic eruptions are no longer an issue as a result of technological advances.
C	Scientists have made important progress when it comes to predicting volcanic eruptions.
D	Scientists should focus only on earthquake detection when it comes to predicting volcanic eruptions.

Explanation:

Detailed explanation-1: -A volcano is an opening or rupture in the earth’s surface that allows magma (hot liquid and semi-liquid rock), volcanic ash and gases to escape. They are generally found where tectonic plates come together or separate but they can also occur in the middle of plates due to volcanic hotspots.

Detailed explanation-2: -Deep within the Earth it is so hot that some rocks slowly melt and become a thick flowing substance called magma. Since it is lighter than the solid rock around it, magma rises and collects in magma chambers. Eventually, some of the magma pushes through vents and fissures to the Earth’s surface.

Detailed explanation-3: -Volcanoes spew hot, dangerous gases, ash, lava, and rock that are powerfully destructive. People have died from volcanic blasts. Volcanic eruptions can result in additional threats to health, such as floods, mudslides, power outages, drinking water contamination, and wildfires.

Detailed explanation-4: -Definition: A volcanic eruption occurs when magma is released from a volcano. Volcanic eruptions can be quite calm and effusive, or they can be explosive. Effusive eruptions produce lava flows, while explosive eruptions produce ash and pyroclastic density currents.

There is 1 question to complete.

GEOLOGY

EARTH SCIENCE

VOLCANOES