This document lists and briefly describes 5 natural disasters: drought, flood, forest fire, tornadoes, and volcanic eruptions. For each disaster, it outlines key characteristics such as causes and impacts. Drought is described as a period of unusually dry weather caused by lack of rain. Floods occur when there is more water than the environment can hold, such as from excessive rain or snow melt. Forest fires are generally started by lightning or human causes and can burn large areas. Tornadoes form from interacting hot and cold air masses and cause damage through high winds. Volcanic eruptions happen when magma reaches the surface from underground.
FOR THIS PROJECT I WOULD LIKE TO THANK MY SOCIAL SCIENCE TEACHER MRS. SAYEEDA BANO MAM AS SHE HAD PROVIDED US A LOT OF EFFORTS . I WOULD ALSO LIKE TO THANK OUR PRINCIPAL MRS. K. SULEENA NAIR AS SHE GAVE US A GOLDEN OPPORTUNITY TO SHOW OUR TALENT. I WOULD ALSO LIKE TO THANK MY PARENTS AS THEY PROVIDED ME WITH ALL THE NECESSARY MATERIALS NEEDED FOR THE PROJECT.
Introduction to natural disaster
About earthquake
How earthquake happens
Major earthquakes around the world
A natural disaster is an event with a natural, as opposed to human, cause that results in large-scale loss of life or damage to property. It could be related to weather, geology, biology or even factors outside the Earth. Examples are earthquakes, hurricanes, droughts and flooding. Disease epidemics are sometimes considered natural disasters, but may be put into a different category. In some cases, natural and human factors may combine to produce a disaster.
An earthquake (also known as a quake,tremor or temblor) is the result of a sudden release of energy in the earth’s crust that creates seismic waves. The seismicity , seismism or seismic activity of an area refers to the frequency, type and size of earthquakes experienced over a period of time.
Here are three topics described in this presentation about ecosystem balance and human impact that are as follows;
1- Deforestation
2- Global Warming
3- Acid Rain
FOR THIS PROJECT I WOULD LIKE TO THANK MY SOCIAL SCIENCE TEACHER MRS. SAYEEDA BANO MAM AS SHE HAD PROVIDED US A LOT OF EFFORTS . I WOULD ALSO LIKE TO THANK OUR PRINCIPAL MRS. K. SULEENA NAIR AS SHE GAVE US A GOLDEN OPPORTUNITY TO SHOW OUR TALENT. I WOULD ALSO LIKE TO THANK MY PARENTS AS THEY PROVIDED ME WITH ALL THE NECESSARY MATERIALS NEEDED FOR THE PROJECT.
Introduction to natural disaster
About earthquake
How earthquake happens
Major earthquakes around the world
A natural disaster is an event with a natural, as opposed to human, cause that results in large-scale loss of life or damage to property. It could be related to weather, geology, biology or even factors outside the Earth. Examples are earthquakes, hurricanes, droughts and flooding. Disease epidemics are sometimes considered natural disasters, but may be put into a different category. In some cases, natural and human factors may combine to produce a disaster.
An earthquake (also known as a quake,tremor or temblor) is the result of a sudden release of energy in the earth’s crust that creates seismic waves. The seismicity , seismism or seismic activity of an area refers to the frequency, type and size of earthquakes experienced over a period of time.
Here are three topics described in this presentation about ecosystem balance and human impact that are as follows;
1- Deforestation
2- Global Warming
3- Acid Rain
Disasters and types of disasters. Natural disasters such as floods, cyclone,earthquake,tsunami,volcano and so on. these are caused naturally. man made disasters like oil spills and gas leaks. These are caused due to human activity.
What is a Desert?What is Desert Ecosystem?Types of desert,A Desert’s Characteristics ,Climate,Animals,Endangered Animals ,Plant Life of Deserts ,seasons,Adaptations,Human effects,Structure & Functions,Flora,Fauna,Environmental threats to deserts,major deserts,The ten largest deserts .
5. • Drought is a period or condition of
unusually dry weather within a
geographic area where rainfall is
normally present. During a drought
there is a lack of precipitation. Droughts
occur in all climatic zones. However, its
characteristics vary significantly from
one region to another.
6.
7. • We already know that a drought occurs
when not enough rain falls to the
ground.
• Or droughts occur because water vapor
is not brought by air currents to the right
areas at the right times.
8.
9. Environmental
- Increased desertification - Damage to animal species
- Reduction and degradation of fish and wildlife habitat
- Lack of feed and drinking water
- Disease
- Increased predation.
- loss of wildlife in some areas and too many in others
- Increased stress to endangered species
- Damage to plant species
- Increased number and severity of fires
- Wind and water erosion of soils
10. Social
- Food shortages
- Loss of human life from food shortages, heat, suicides, violence
- Mental and physical stress
- Water user conflicts
- Political conflicts
- Social unrest
- Public dissatisfaction with government regarding drought
response
- Inequity in the distribution of drought relief
- Loss of cultural sites
- Reduced quality of life which leads to changes in lifestyle
- increased poverty
- Population migrations
11.
12.
13.
14. • A form of natural disaster when
there is more water than the lakes,
rivers, oceans, or ground can hold
15.
16. • Too much rain
• Excessive melting of snow
• Too much water for the ground to
absorb water
• Ice or other objects block the flow of
the river
17.
18. • Damage property and homes
• Kill people and animals
• Communities in flood zones must be
rebuilt with proper flood controlling
equipment
19.
20.
21.
22. • A forest fire is a natural disaster consisting of
a fire which destroys a forested area, and can
be a great danger to people who live in
forests as well as wildlife. Forest fires are
generally started by lightning, but also by
human negligence or arson, and can burn
thousands of square kilometers.
23.
24. • Extinguishing fire improperly.
• Burning candles in tents.
• Burning crackers in the forest.
• Parking cars in the forest.
• Throwing industrial waste in the forest.
• Lighting cigarette in the forest.
• Accumulating dry leaves and bushes at
one place.
25.
26. • Destroys in the vegetation of plants.
• Destroys in the vegetation of
animals.
• Destroys the water of lakes, rivers,
ocean and seas.
27.
28.
29.
30. • A tornado is a powerful column of winds
spiraling around a center of low
atmospheric pressure. It looks like a
large black funnel hanging down from a
storm cloud. The narrow end will move
over the earth, whipping back and forth
like a tail.
31.
32. • Tornadoes are formed when hot air and
cold air are mixed.
• The clouds grow larger and larger.
Finally, a thunderstorm is brewed up
with a strong updraft.
• The moisture in the warm air rises and
condenses into large clouds.
33.
34. • Tornadoes can make People die.
• The tornado can destroy a lot of
homes, stores, and much more.
• It can make serious injuries.
35.
36.
37.
38. • When a part of the earth's upper
mantle or lower crust melts, magma
forms.
39.
40. • Low water, high silica (very viscous) - pasty lava -
often building domes.
• Low water, low silica - runny lava flows (not
viscous).
• High water, low silica(not viscous) - fountain of
runny lava.
• High water, high silica (very viscous) – explosion.
41.
42. • Volcanic Ashes
• Debris Avalanches, Landslides, Tsunamis
• Blast
• Lava
• Types of Lava Flows
• Gas