Class 5 Science - Natural Calamities - CBSE Worksheets Solutions - 1

Q1: Multiple Choice Questions (MCQs).

(i) Which of the following is a natural calamity?
(a) Earthquake
(b) Car accident
(c) Building collapse
(d) Forest fire
Ans: (a)

An Earthquake is a natural calamity caused due to the sudden movement of Earth's tectonic plates.

(ii) What is the main cause of floods?
(a) Heavy rainfall
(b) Earthquake
(c) Volcanic eruption
(d) Landslide
Ans: (a)

Heavy rainfall can cause the water levels in rivers and lakes to rise, resulting in floods.

(iii) Which of the following natural calamities is caused due to the movement of Earth's tectonic plates?
(a) Cyclone
(b) Flood
(c) Earthquake
(d) Drought
Ans: (c)

Earthquakes are caused due to the movement of Earth's tectonic plates, which can release a large amount of energy.

(iv) What is a drought?
(a) A long period of abnormally low rainfall
(b) A long period of abnormally high rainfall
(c) A sudden shaking of the Earth's surface
(d) A severe storm with high-speed winds
Ans: (a)

Drought is a natural calamity that occurs when an area experiences a long period of abnormally low rainfall, leading to water scarcity.

(v) What can be a long-term effect of a natural calamity?
(a) Loss of life
(b) Damage to property
(c) Displacement of people
(d) All of the above
Ans: (d)

Natural calamities can have long-term effects like loss of life, damage to property, and displacement of people.

Q2: Fill in the blanks.

(i) A __________ is a sudden shaking of the Earth's surface.
Ans: An earthquake is a sudden shaking of the Earth's surface.

(ii) A __________ is a huge wave caused by an earthquake or volcanic eruption under the sea.
Ans: A tsunami is a huge wave caused by an earthquake or volcanic eruption under the sea.

(iii) A __________ is a violent storm with very strong winds, forming in the ocean.
Ans: A hurricane is a violent storm with very strong winds, forming in the ocean. 

(iv) A __________ is a long period of time with little or no rain, causing water shortage.
Ans: A drought is a long period of time with little or no rain, causing water shortage.

(v) A __________ is a sudden flow of water with great force, causing destruction.
Ans: A flood is a sudden flow of water with great force, causing destruction.

Q3: True or False.

(i) Earthquakes occur when two tectonic plates move away from each other.
(ii) Volcanic eruptions can cause tsunamis.
(iii) Hurricanes form over land.
(iv) Droughts can lead to crop failure and water shortage.
(v) Floods can be beneficial as they provide fertile soil for agriculture.
Ans: 
(i) False: Earthquakes occur when two tectonic plates collide or move away from each other, causing vibrations and shaking on the Earth's surface.
(ii) True: Volcanic eruptions can cause tsunamis when they occur under the sea and displace a large volume of water, forming massive waves.
(iii) False: Hurricanes form over warm ocean waters, not over land
(iv) True: Droughts can lead to crop failure and water shortage due to the lack of rainfall and subsequent decrease in available water resources.
(v) True: Floods can be beneficial in some cases, as they can deposit fertile soil on agricultural lands, providing nutrients for crops to grow.

Q4: Match the column.

Ans:

Q5: Short Answer Questions.

(i) What is a natural calamity? Give two examples.
Ans: A natural calamity is a sudden and destructive event caused by natural forces, which results in significant damage to human life, property, and the environment. Examples: Earthquake, Flood.

(ii) How do earthquakes occur?
Ans: Earthquakes occur when the Earth's tectonic plates move against each other, causing a release of energy that results in the shaking of the Earth's surface.

(iii) What are the effects of floods on human life and property?
Ans: Floods can cause significant damage to human life and property. They can result in loss of life, destruction of homes and infrastructure, damage to crops and livestock, and the spread of diseases.

(iv) How can we prepare ourselves to face natural calamities?
Ans: To prepare ourselves for natural calamities, we can follow these steps:

• Be aware of the risks in our area.
• Make an emergency plan and share it with family members.
• Keep an emergency kit with essential items like food, water, medicines, and important documents.
• Learn about evacuation routes and safe places to go during a calamity.
• Stay informed by monitoring weather updates and following instructions from authorities.

(v) What are the causes of landslides?
Ans: Landslides can be caused by various factors, including heavy rainfall, deforestation, earthquakes, volcanic eruptions, and human activities like construction on unstable slopes.