Direction for Computer Assisted lesson

Follow the Instruction given below:This lesson is about the topic-Drought.This capsule contain suitable slides related to the concept. Necessary Pictures are provided in each slide. Use mouse (single click) to move to the next slide. Click on the textbox to get the response.Please note the direction given by the computer.Brain Teasers are provided for developing conceptsBrain relaxers are provided for self checking with necessary explanation.After completing the lesson the learners can recapitulate the lesson

through Test Your knowledge session.

Several thousand people die each year worldwide from heat stress.

Most deaths in North America occur in inner cities in the southeastern US.

Severe urban pollution may be a contributing factor.

Heat stress

Heat waves, drought, dust

Picture of Drought Are HereLook at the figures how these Droughts are effecting the humans ,animals as well the plants

1 2

What is Drought ?

Drought is when an area gets less than its normal amount of rain over months or even year . crops and other plants need water to grow , and land animals need it to live.

There are many definitions , but usually it is a period of time where there is much less than average rainfall.

Brain Teaser 2.1 Is Drought is negatively affecting living things?

Yes No

Refer Brain Relaxer 2.1 Click here

Drought affects our lives in many different ways because water is such an important part of so many of our activities. We need water to live , and animals , and plants do too.

Redused the rainfall result in drought Occures because water vapour not brought by air currents to right areas

at right times. Unusual currents of cold and warm water in oceans creates high pressure

. EI Nino causes drought inAsia. Mountain prevent wind from moisture to needy region.

causes of drought

PROLONGED LACK OF PRECIPITATION

LOSS OF VEGETATION

INSECT INFESTATION

LOSS OF USE OF AG. LAND

LOSS OF SOIL MOSTURE

DEPLETION/POLLUTION OF GROUND WATER

LOSS OF CROPS

CAUSES & CONSE-

QUENCES

DROUGHTS

DISASTER LABORATORIES

Here are some pictures drought are given. Observe the picture carefullu.

Fig.2

23

456

1

A Slow-Onset, Natural Phenomenon That Can

Happen Anywhere

UNDERSTANDING DROUGHT

DROUGHT

Droughtis an environmental extreme that is

characterized by an absence of precipitation in

the local and regional water cycle as a consequence of

interactions of elements of the atmosphere, hydrosphere, and

lithosphere.

D5

Brain Teaser 2.2Are you think Drought only affect the plants, animals , humans ?...

Yes No

Refer Brain Relaxer 2.2

Click here

Drought– A Natural Phenomenon That Can Cause Disasters

Planet Earth’s atmospheric-

oceanic-lithospheric

interactions cause:

Droughts

CHARACTERISTICS OF DROUGHT

SLOW ONSETDIVERSE IN LOCATION

AND DURATIONDIFFICULT TO

MEASURE THE DURATION AND THE

EXTENT OF THE SOCIETAL IMPACTS

D6

CONCEPT FORMATION

C2 A drought is a period of below-average precipitation of in a given region, resulting in prolonged shortages in its water supply, whether atmosphereic, surface or ground water.

UNIT 2

THINKING SESSION

DROUGHT HAZARDS

Brain Relaxer 2.1

Read to the newsINDIAN EXPRESS 2010-2011Thiruvananthapuram: The china drought was a drought the began in late 2010 and impacted eight provinces in the northern part of the People’s Republic of China (PRC). It was the worst drought to hit the country in 60 years, and it affected most of wheat producing regions in the PRC

From the above news it is clear that drought

affected the living beings and as well

the plans also

Brain Relaxer 2.2

HIGH TEMPERATURES VERY LOW HUMIDITY LOSS OF SOIL MOISTURE VANISHING STREAMS, LAKES, AND

WATER TABLES

DROUGHT HAZARDS (AKA Potential disaster Agents)

• Drought is linked to loss of water quantity and quality, which can lead to major loss of life (people and livestock), loss of livelihoods, loss of habitats, and sometimes famine.

DROUGHT LINKAGES AND RISKS

Between 108 BC and 1911 AD, 1,828 famines of varying severity occurred in China (i.e., one nearly every year in at least one province

NOTE:

Millions in China have died from lack of food

NOTE

Test your knowledge

I Say True or False Drought is linked to loss of water quantity and quality

2. A desaster may be domestic or international

3. Give two important drought hazards ? …………………………………………………………………………. …Answer……………………………………………………………………….

True False

True False