Slide 1: DESERTAND DESERT ANIMALS
A power point presentation
BY: MRS. SMRITI AMOL SINGH
TGT. ENGLISH Slide 2: DESERT Slide 3: What is a desert? A desert is a place with 10 inches or 25cm of rain or less a year. Deserts cover about one seventh of the earth's surface. They are all extremely dry, and can be one of the harshest places on earth . Many deserts have extreme temperature, with very high temperatures in the day and cold temperatures at night . Slide 4: Deserts are not only made of sand as many people think. They consist of rocks, mountains, and sand. Slide 5: COLD DESERTS Some deserts are very cold.
Such deserts can also have mountains and hills.
The temperatures here are below freezing point.
Leh and Ladakh are examples of cold desert Slide 6: LADAKH : A COLD DESERT Slide 7: Popular belief is that it is dry, hot, waterless………an endless stretch of sand where no rain falls and nothing grows. BUT
This is not true. A DESERT CAN BE A BEAUTIFUL PLACE ! Slide 8: DESERT FLOWERS.
When it rains, desert flowers bloom and the scene is as beautiful as that of any beautiful garden that you have seen. Slide 9: DESERT PLANTS Saguaro Cactus Cactus flower HOW DO DESERT PLANTS SURVIVE? Slide 10: strawberry pitaya Rainbow cacti Slide 11: DIFFERENT KINDS OF CACTUS. Slide 12: Their roots quickly absorb
moisture from the
light rains received in the desert Cactus store water
in their stems desert plants in general, the cacti, adapt in a number of general ways. One adaptation is to replace leaves with thin needles to minimize moisture loss. HOW DO DESERT PLANTS SURVIVE? Slide 13: DESERT ANIMALS BULL SNAKE GERBIL BABY DESERT TORTOISE RATTLESNAKE Slide 14: Desert spiny lizard Spider Beetle Darkling Beetle Slide 15: How do desert animals survive? SMALLER DESERT ANIMALS. These animals can live in a desert because they do not drink any water.
Some eat other animals and get the moisture from the meat they eat.
Other small animals get moisture from the juices of plants and seeds they eat.
They come out only at night and spend the hottest part of the day in cool underground burrows. Slide 16: CAMEL: THE SHIP OF THE DESERT BACTRIAN CAMEL DROMEDARY CAMEL Slide 17: WHY IS THE CAMEL CALLED THE SHIP OF THE DESERT? because it is a common mode of transport for carrying people and supplies.
It can live without water for many days.
It doesn’t sweat and can stand high body temperature. Hence it can hold water for a long time.
Camel stores fat in it’s hump which nourishes
it when food is scarce.
Its mouth is so tough that even the
sharp thorn cannot pierce through. Slide 18: SOME OTHER ANIMALS Mongooses like to hunt together.
They travel in groups.
They prey upon rodents, birds, reptiles, frogs, insects, and worms.
They are very alert: warn each other with a special alarm call if spot danger or anything suspicious. The Indian Mongoose and others are popularly used to fight and kill venomous snakes, including vipers.
They can do this because of their agility and cunningness. Slide 19: Rattlesnakes come in 16 distinct varieties. There are numerous subspecies and color variations, but they are all positively identified by the jointed rattles on the tail and a triangular head. RATTLESNAKE Slide 20: Rattlesnakes are carnivorous. Instead of chewing their food, they swallow it whole. They eat lizards and small rodents such as ground squirrels, small rabbits, rats and mice, striking rather than attempting to hold their prey. Sometimes it prefers to avoid people. It holds its tail upright and rattles the end in the hope that the intruder will go away.
However, if its warnings are ignored and it feels threatened, it coils ready to bite. Slide 21: A desert may have an oasis.
An oasis is like a green island in the middle of a desert.
Here a spring or a well gives plants and trees a chance to grow.
Travellers always halt here to take rest and refresh themselves. AN OASIS Slide 22: Strong winds blow and raise heaps of sand.
These collect in a place as a mound.
These mounds are known as ‘SAND DUNES’.
Sand dunes shift and move endlessly across the desert.
Plants cannot survive here. SAND DUNES Slide 23: LET US THINK DESERTS EXIST LIKE THE DENSE FORESTS
AND DEEP OCEANS.
THEY ARE A PART OF GOD’S PLAN.
JUST BECAUSE THEY ARE HOT AND DRY
THEY ARE NOT USELESS PARTS OF EARTH.
SO LET US ACCEPT THE DESERT AS AN
IMPORTANT AND USEFUL
PART OF NATURE.