Worksheet Solutions: Natural Disasters | Be an Explorer 5: Book Solutions, Notes & Worksheets - Class 5 PDF Download

Q1: Multiple Choice Questions (MCQs).

(i) What is a Natural Disaster?
(a) Planned events causing destruction
(b) Events caused by the imbalance of nature causing destruction
(c) Human-made disasters
(d) Beneficial events for nature
Ans: (b)
Natural disasters as events caused by the imbalance of nature that result in destruction.

(ii) What device measures the tremor of an earthquake?
(a) Barometer
(b) Anemometer
(c) Seismograph
(d) Thermometer
Ans: (c)
Seismograph measures the tremor of an earthquake.

(iii) Which scale is used to measure the magnitude of an earthquake?
(a) Celsius Scale
(b) Richter Scale
(c) Fahrenheit Scale
(d) Kelvin Scale
Ans: (b)
The Richter scale is specifically as the scale used to measure the magnitude of an earthquake.

(iv) What is the cause of most floods?
(a) Cyclones
(b) Excessive rain
(c) Landslides
(d) Melting snow
Ans: (b)
The most common cause of floods is excessive rain falling over an area.

(v) What is the primary cause of a drought?
(a) Lack of water conservation
(b) Excessive rainfall
(c) Deforestation
(d) Volcanic eruptions
Ans: (c)
Growing more trees and avoiding deforestation as measures to prevent droughts.

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Q2: Fill in the Blanks.

(i) An earthquake occurs due to disturbances taking place at the _________.
Ans: Epicenter.
An earthquake occurs due to disturbances at the epicenter.

(ii) The Richter scale measures the _________ of an earthquake.
Ans: Magnitude.
The Richter scale measures the magnitude or size of an earthquake.

(iii) A flood occurs when a large amount of water spreads across a region and __________ the surrounding areas.
Ans: Submerges.
Floods occur when a large amount of water spreads across a region and submerges the surrounding areas.

(iv) Cyclones are known to cause great damage to life and property, especially in coastal _________.
Ans: Regions.
Cyclones are known to cause great damage to life and property, especially in coastal regions.

(v) Forest fires or wild fires are common in uncontrolled fires in ________ forests.
Ans: Wild.
Forest fires or wild fires are uncontrolled fires in wild forests.

Q3: Match the Column.

Ans:

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Q4: True or False.

(i) The focus of an earthquake is the point directly above the epicenter.
Ans: True.
The place of origin of an earthquake is called the focus.

(ii) The Richter scale measures the color of the earthquake.
Ans: False.
The Richter scale measures the magnitude of an earthquake, not its color.

(iii) Floods can be caused by the sudden melting of snow on mountains.
Ans: True.
Excessive rain or the sudden melting of snow on mountains is mentioned as a cause of floods.

(iv) Cyclones are known as hurricanes in the Indian Ocean region.
Ans: False.
Cyclones are known as typhoons in the Pacific Ocean region, not hurricanes in the Indian Ocean region.

(v) Drought-resistant plants should not be grown to prevent droughts.
Ans: False.
Growing more drought-resistant plants as a measure to prevent droughts.