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Lucky Ravishankar Mishra
Subject: Science
, asked 1 week, 1 day ago
Earthquakes
Many natural phenomena such as lightning, cyclones, and thunderstorms can be predicted well in advance. However, there is one natural phenomenon that cannot be predicted. This natural phenomenon is the?earthquake. Earthquakes can produce large scale destruction. You must have heard about the earthquake, which lead to large scale destruction in the Bhuj district of Gujarat.
An earthquake is a vibration or tremor produced in the Earth?s crust.?It is caused by the disturbances originating deep inside the Earth?s crust. Generally, the period for which the effect of an earthquake is felt is very small.
Earthquakes vary extremely in magnitude. Sometimes, earthquakes are so mild that we don?t even feel them. Earthquakes of large magnitudes are not very frequent, but they can produce large scale damage to houses, buildings, and roads.
The earthquake in Bhuj took lives of as many as 15000 people. Recently in China, approximately 8600 people lost their lives due to an earthquake.
Earthquakes can also produce floods, landslides, and tsunamis. In 2004, a tsunami occurred in the Indian Ocean. It is the second largest earthquake ever recorded and countries like India, Sri Lanka, Indonesia, and Thailand were severely hit by its impact.
?
??
W?hat causes an earthquake?
We know that tremors are produced by the disturbances taking place deep down in the uppermost layer of the Earth known as the?crust.
T?his exterior portion of the Earth is not continuous, and is broken into many pieces known as?plates. These plates move constantly. They can slide past one another, or move into each other because of the collisions taking place between them.
When this happens, disturbances are produced in the earth?s crust, which lead to an earthquake on the surface of the Earth. However, this is not the only reason which can give rise to an earthquake.
Earthquakes can also be caused by the following:
Volcanic eruption
Meteors falling on the Earth?s surface
Underground explosions. For example, underground nuclear tests.
Collapsing structures such as mines etc.
We know that earthquakes are caused by the movement of the plates. Hence, boundaries of these plates are weak zones as earthquakes are more likely to originate from here. These weak zones are also known as?seismic zones or fault zones. In India, some places that come under seismic zones are Guwahati, Srinagar, New Delhi, Patna, Lucknow, Indore, Chennai, and Coimbatore.
The disasterous effects which an earthquake brings along with are:Loss of life and propertyDirection of river flows and streams changesChange in level of water-tableEarthquake below?oceanic bed can cause tsunami which leads?to vast destruction of coastal regionsImbalance in ecosystem due to loss of biodiversity
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Answer
1
Aditya Sinha
Subject: Science
, asked 1 week, 1 day ago
Suggest an activity to see a if a material had luster
Answer
2
Yamini
Subject: Science
, asked 1 week, 3 days ago
I have read that molten iron (which is found in the earth's core) is the cause of the earth's magnetism. But how can molten iron (which is a liquid) have a north pole and a south pole?
Answer
1
Sandhya Viswakarma
Subject: Science
, asked 1 week, 3 days ago
What is vermicompost?
Answer
4
Arya N. Sawant
Subject: Science
, asked 1 week, 5 days ago
during cold winter inscet fell cold Nes or No
Answer
4
Dhruv Mahajan
Subject: Science
, asked 1 week, 6 days ago
What is lever and what are three types of lever with examples
Answer
1
Arna Gupta
Subject: Science
, asked 1 week, 6 days ago
Light travels at the speed of 3,00,000 km per second.Light from the sun reaches us in 8minutes.If a supersonic jet were to travel from the sun at the speed of 1000 km per hour, approximately how long would it take to travel the same distance?
a) 3 months b) 5 years c) 17 years d) 221 years.
Answer
1
Marsha Nandi
Subject: Science
, asked 2 weeks ago
1. Fill in the blanks
a) Combustion is helped by .................
b) All living things require .................
to survive
c) Percentage of Nitrogen in air is ..............
d) Plants require the gas called ............. to photosynthesize.
e) The ............... are rotated by wind and used to draw underground water.
f) The air helps in dispersal of
.................. and ..................
g) Air acts as a medium for transmission of ..................
2. Give one word answer for the following:
a) The blanket of air surrounding the earth.
b) The process by which plants release water vapour in the atmosphere.
c) The process by which both plants and animals get energy from food.
d) Air in motion
e) A gas present in the form of layer in the upper atmosphere that protects us from the harmful Ultra Violet rays.
f) We cannot see it but we can feel it when it moves.
3. Answer in short:
a) What is the function of atmosphere?
b) How is Oxygen in the air replaced?
c) How do fishes breathe?
Answer
1
Marsha Nandi
Subject: Science
, asked 2 weeks ago
I. Fill in the blanks:
a. The bulb will not glow if the filament of the bulb
has ____________.
b.___________ is a non-metal which is a good
conductor of electricity.
c. A dry cell contains ___________ and __________
in powdered or paste form.
d. Electricity ________ flow through iron.
II Short answer type questions:
a. What is the difference between a cell and a
battery?
b.What happens if two terminals of the cell is
connected to a wire without connecting an
appliance in a circuit?
c. Why the filament of a bulb is made up of
tungsten?
II. Long Answer type questions:
1. Explain the working of an electric torch.
2. Consider the following circuit diagrams:
In which of the above circuits bulb will glow and why?
Answer
1
Marsha Nandi
Subject: Science
, asked 2 weeks ago
1. GIVE ONE WORD ANSWERS:
i) Example of a natural magnet _______________.
ii) A freely suspended magnet always show ___________________ direction.
iii) We can magnetise a magnetic material by using a ____________.
iv) A magnet will always has _______________ poles.
v) Copper is a ____________________ substance.
2. Write T for true and F for false statements.
i) Magnetic poles never exist in pairs.
ii) Similar poles of a magnet repel each other.
iii) Dropping a magnet does not harm it.
3. Why we need magnetic keepers?
4.What is magnetic compass?
Answer
1
Marsha Nandi
Subject: Science
, asked 2 weeks ago
1.Fill in the blanks
a) Anything that we throw away is called...........
b)..........are a serious environmental and health concern.
c) Rotting is carried out by.......
d) Glass is a .......... waste.
e) The...... are called farmer's friend.
f) The......... benefits much from recycling paper.
2.Answer in one word
a) The process of conversation of biodegradable materials into manure.
b) The process by which waste materials are reused to make new products.
c) The type of waste vehicles and industries produce.
d) The type of bags we should use for vegetables and other groceries instead of plastic.
e) Plastic and tin cans are examples of which type of waste?
3.Answer in short
a) What is vermicomposting?
b) Write any three points on how can overuse of plastic be minimised.
c) Write any two ways in which the amount of waste can be reduced.
Answer
1
Marsha Nandi
Subject: Science
, asked 2 weeks ago
Please answer these questions.
Answer
1
Lavanya Aggarwal
Subject: Science
, asked 2 weeks, 1 day ago
what type of image is formed on the screen of a pinhole camera
Answer
1
Lakshya Choudhary
Subject: Science
, asked 2 weeks, 1 day ago
why does the lump of cotton wool shrink in water
Answer
2
Aditya Kumar
Subject: Science
, asked 2 weeks, 1 day ago
how is vermicomposting useful
Answer
3
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What are you looking for?
Many natural phenomena such as lightning, cyclones, and thunderstorms can be predicted well in advance. However, there is one natural phenomenon that cannot be predicted. This natural phenomenon is the?earthquake. Earthquakes can produce large scale destruction. You must have heard about the earthquake, which lead to large scale destruction in the Bhuj district of Gujarat.
An earthquake is a vibration or tremor produced in the Earth?s crust.?It is caused by the disturbances originating deep inside the Earth?s crust. Generally, the period for which the effect of an earthquake is felt is very small.
Earthquakes vary extremely in magnitude. Sometimes, earthquakes are so mild that we don?t even feel them. Earthquakes of large magnitudes are not very frequent, but they can produce large scale damage to houses, buildings, and roads.
The earthquake in Bhuj took lives of as many as 15000 people. Recently in China, approximately 8600 people lost their lives due to an earthquake.
Earthquakes can also produce floods, landslides, and tsunamis. In 2004, a tsunami occurred in the Indian Ocean. It is the second largest earthquake ever recorded and countries like India, Sri Lanka, Indonesia, and Thailand were severely hit by its impact.
?
??
W?hat causes an earthquake?
We know that tremors are produced by the disturbances taking place deep down in the uppermost layer of the Earth known as the?crust.
T?his exterior portion of the Earth is not continuous, and is broken into many pieces known as?plates. These plates move constantly. They can slide past one another, or move into each other because of the collisions taking place between them.
When this happens, disturbances are produced in the earth?s crust, which lead to an earthquake on the surface of the Earth. However, this is not the only reason which can give rise to an earthquake.
Earthquakes can also be caused by the following:
Volcanic eruption
Meteors falling on the Earth?s surface
Underground explosions. For example, underground nuclear tests.
Collapsing structures such as mines etc.
We know that earthquakes are caused by the movement of the plates. Hence, boundaries of these plates are weak zones as earthquakes are more likely to originate from here. These weak zones are also known as?seismic zones or fault zones. In India, some places that come under seismic zones are Guwahati, Srinagar, New Delhi, Patna, Lucknow, Indore, Chennai, and Coimbatore.
The disasterous effects which an earthquake brings along with are:Loss of life and propertyDirection of river flows and streams changesChange in level of water-tableEarthquake below?oceanic bed can cause tsunami which leads?to vast destruction of coastal regionsImbalance in ecosystem due to loss of biodiversity
?
Strengthen this topic
TAKE A TOPIC TEST
?
SWIPE FOR NEXT TOPIC
a) 3 months b) 5 years c) 17 years d) 221 years.
a) Combustion is helped by .................
b) All living things require .................
to survive
c) Percentage of Nitrogen in air is ..............
d) Plants require the gas called ............. to photosynthesize.
e) The ............... are rotated by wind and used to draw underground water.
f) The air helps in dispersal of
.................. and ..................
g) Air acts as a medium for transmission of ..................
2. Give one word answer for the following:
a) The blanket of air surrounding the earth.
b) The process by which plants release water vapour in the atmosphere.
c) The process by which both plants and animals get energy from food.
d) Air in motion
e) A gas present in the form of layer in the upper atmosphere that protects us from the harmful Ultra Violet rays.
f) We cannot see it but we can feel it when it moves.
3. Answer in short:
a) What is the function of atmosphere?
b) How is Oxygen in the air replaced?
c) How do fishes breathe?
a. The bulb will not glow if the filament of the bulb
has ____________.
b.___________ is a non-metal which is a good
conductor of electricity.
c. A dry cell contains ___________ and __________
in powdered or paste form.
d. Electricity ________ flow through iron.
II Short answer type questions:
a. What is the difference between a cell and a
battery?
b.What happens if two terminals of the cell is
connected to a wire without connecting an
appliance in a circuit?
c. Why the filament of a bulb is made up of
tungsten?
II. Long Answer type questions:
1. Explain the working of an electric torch.
2. Consider the following circuit diagrams:
In which of the above circuits bulb will glow and why?
i) Example of a natural magnet _______________.
ii) A freely suspended magnet always show ___________________ direction.
iii) We can magnetise a magnetic material by using a ____________.
iv) A magnet will always has _______________ poles.
v) Copper is a ____________________ substance.
2. Write T for true and F for false statements.
i) Magnetic poles never exist in pairs.
ii) Similar poles of a magnet repel each other.
iii) Dropping a magnet does not harm it.
3. Why we need magnetic keepers?
4.What is magnetic compass?
a) Anything that we throw away is called...........
b)..........are a serious environmental and health concern.
c) Rotting is carried out by.......
d) Glass is a .......... waste.
e) The...... are called farmer's friend.
f) The......... benefits much from recycling paper.
2.Answer in one word
a) The process of conversation of biodegradable materials into manure.
b) The process by which waste materials are reused to make new products.
c) The type of waste vehicles and industries produce.
d) The type of bags we should use for vegetables and other groceries instead of plastic.
e) Plastic and tin cans are examples of which type of waste?
3.Answer in short
a) What is vermicomposting?
b) Write any three points on how can overuse of plastic be minimised.
c) Write any two ways in which the amount of waste can be reduced.