PPT on sand & windmill , gr-5 sci exhibition

1. Sand & Windmill
By :
Abhiram
&
Sanjana

2. Sand
A loose granular substance, typically pale
yellowish brown, resulting from the erosion of
siliceous and other rocks and forming a major
constituent of beaches, riverbeds, the
seabed, and deserts.

3. How is sand formed
Sand is a sedimentary material loose grains of
worn out and disintegrated rocks. Sand is a
naturally occurring fragmented material
comprised of tiny particles of decomposed
rocks, shells, or corals, but there are also
unnatural ways to form sand.

4. Types of Sand
Glass Sand Gypsum Sand Garnet Sand
Volcanic Sand Olivine Sand
Desert Sand

5. Uses of sand
Construction Leisure And Sport
Water Filtration
Pottery

6. Things made up of Sand
• Glass
• Sand paper
• Hourglass

7. Animals living on Sand
There some animals they are as follows:
• Ant • Arabian Camel
• Bighorn Sheep
• Bandicoot
• Great Horned Owl
• Eagle

8. Plants living on Sand
• Many plants are found in the desert.
• They usually grow to the ground
• These plants have special parts that help them
save water.

9. Life on sand
There is not much crops in desert to grow but
many people live there. They move their
animals and belonging from place to place in
search of water and plants. These men are
crossing from the Syrian desert to Middle East.
They are wearing long, loose clothes to
protect themselves from the heat of the sand.

10. Desert
The desert is the land of extreme heat and
dryness with cold nights. Desert are difficult
place to live in. They often have names like:
• “THE DEATH VALLEY”
• “THE EMPTY QUARTER”

11. Top 5 Deserts in world
The top 5 desert in the world are:
• Sahara Desert
• Gobi Desert
• Gibson Desert
• Thar Desert
• Kalahari Desert

12. Kinds of Deserts
Hot • The summers are very hot.
• The temperature are very
warm all year round.
Desert
• Short ,warm summers &
Cold Long, cold winter.
• Found in places near north
Desert and south pole.

13. Oasis
An oasis is the only place where water is
found in a desert. Water collects in hollows
worn out by the wind. It may come from
desert storms or from rain that falls on
mountains on the edge of the desert.
Rainwater drains through rocks deep under
the desert and collects at an oasis.

14. Sand Dunes
The shape of a sand dune depends on the way
the wind is blowing :
When the wind blows from one
direction, curved dunes, called
barchans, formed.
wind direction

15. Climate
• There are 2 types of climate Hot and Dry.
• In the summer during daytime the
temperature of the Sahara Desert often goes
to over 100 degrees Fahrenheit.
• The hottest temperature, meteorologists have
recorded 136 degrees at Azizia, Libya on
September 13,1922
• The desert receives less than 25 centimeters
of rain each year.

16. Sandstorm
 Violent wind forms the sandstorms.
 Sandstorms can last to many days & hours.
 Sandstorms may cause dehydration &
suffocation of animals and humans.
Camels are the only one to survive in sandstorm

17. Windmill
• Windmills are goods for the environment
because no harmful solids, liquid or gases are
produce.
• No need of any fuel or toxic waste is needed.
• Wind energy is used to generate electricity by
using wind turbines.

18. How does a wind turbine works
 The blades catch the wind and turn the rotor
which they are joined to.
The rotor is connected to the nacelle which
houses all the working for the turbine.
The rotor turns a shaft which is connected to
a set of cogs called a gear box.
The gear box is connected to a generator
which makes electricity when it turns.

19. Facts on sand
• The tallest sand dune is ISANOE-n-TIFERNE.
• Deserts cover about one-third of the earth
land-surface.
• The actacania desert in South America had no
rain for 400 years.

21. Ms Deepa
 What is sand ?
Ans: Sand is tiny particles of rocks.
 How is sand used in our daily life ?
Ans: Lamps, Play ground, Bricks, Replace
soil, Construction.
 How is sand connected with desert ?
Ans: In the desert area there is a vast accumulation of
sand. Sand is a loose so difficult to cross.
 Can you say anything interesting thing about sand ?
Ans: The sand dunes

22. Ms Madhu
 What is sand ?
Ans: Dried land where soil is totally gone.
 How is sand used in our daily life ?
Ans: Construction, Pottery, Cooking Utensils, Pots, Reduces
Global Warming.
 How is sand connected with desert ?
Ans: It is fully of sand. Very little of water.
 Can you say anything interesting on sand ?
Ans: Water Filtration

23. Thanksgiving
We both thank our:
Our dear principal
• Sir A.P. Singh
• Ms Precy
• Ms Rachna
• Sir Danny
• Ms Nirupama
Our Mentor
• Sir Manoranjan
• Parents
• Ms Deepa & Ms Madhu

24. Bibliography
• www.sandatlas.org
• www.desertbiomes.com
• www.USGS.com
• www.microscope-microscope.org
• www.wikipedia.org
• Children encyclopedia
• Earth
• Incredible earth
• Googleimages
• www.mbgnet.net
• www.tooter4kids.com
• www.neok12.com
• www.GEOLOGY.com
• www.physics.ohio-state.com
• www.howstuffworks.com
• www.wordsearchfun.com

25. The end
• Thank you for coming to
our exhibition………….
By Sanjana and Abhiram