Sunday, 11 December 2011

The Air We Breathe

NASA BOOK FOR CHILDREN SCIENCE

Saturday, 10 December 2011

Where Does It Rain ?

Listen a song.




Every day millions of tiny drops of water rise up into the air, from rivers and seas. When lots of these tiny drops of water float in the same part of the sky, they make a cloud. If tiny drops bum into each other, they mix together and become bigger drops. When these drops become heavy enough they fall back to Earth. We call this rain. In the country, rain soaks into the ground. In towns it goes down drains.  Eventually the rain runs back into the rivers and seas. It then rises again to the sky to make clouds.







Evaporation: Evaporation is when the sun heats up water in rivers or lakes or the ocean and turns it into vapor or steam. The water vapor or steam leaves the river, lake or ocean and goes into the air. 


Condensation: Water vapor in the air gets cold and changes back into liquid, forming clouds. This is called condensation. 


Precipitation: Precipitation occurs when so much water has condensed that the air cannot hold it anymore. The clouds get heavy and water falls back to the earth in the form of rain, hail, sleet or snow. 

Collection: When water falls back to earth as precipitation, it may fall back in the oceans, lakes or rivers or it may end up on land. When it ends up on land, it will either soak into the earth and become part of the “ground water” that plants and animals use to drink or it may run over the soil and collect in the oceans, lakes or rivers where the cycle starts all over again. 

Materials Of Things


Wednesday, 23 November 2011

Nocturnal Animals

Nocturnal animals 

What are nocturnal animals?

Nocturnal animals come out at night. They live in woods and other quiet places. They move around and feed while we sleep. 

Here are some nocturnal animals
. There are many others including: foxes, badgers, snails and hedgehogs






Can they see at night?
Many nocturnal animals have poor eyesight. They rely on other senses like touch, feel and smell. 
But some nocturnal animals can see very well at night. Owls, for example, have excellent night-time vision. 


Can they hear well? 
Nocturnal animals often need their ears more than their eyes. A wood may seem quiet at night but nocturnal animals listen for small sounds. 

Where can we see nocturnal animals?
Most people don't see nocturnal animals very often. We are usually sleeping when they are out. 
In zoos nocturnal animals are kept in special dark areas during the day. This makes them think it is night. Visitors can then watch them. 


Nocturnal Animals song:


On a moonlit night when the stars come out
There are nocturnal animals all about
1. Whoo, whoo, what do I see (make circles with fingers, hold up to eyes)A wise old owl looking at me
2. Meow, meow, what do I see
A big black cat is looking at me
3. Eee, eee, eee, what do I see
A little bat just looking at me
4. Ribit, ribit, what do I see
A big green tree frog looking at me
5. Squeak, squeak, squeak, what do I see
A garden dormouse looking at me

Animals In Winter

Animals in Winter 







Winter is cold.There is snow on the ground. People live in the warm houses.

What do animals do?
Some animals sleep all winter. It is very deep sleep called hibernation.
Other animals stay active in winter. It is hard for them to find food.
Some birds fly south for the winter. We called this migration.They go to warmer place to find food.
Other birds stay here all winter. We can help by feeding them.


Time For Hibernation
(Frere Jacques tune)

Are you sleeping, are you sleeping,
Big black bear, big black bear?
Time for hibernation.
What is your location?
In a log, in a lair.
 

 
Are you sleeping, are you sleeping,
Hanging bat, hanging bat?
Time for hibernation.
What is your location?
In a cave is where I'm at.

Are you sleeping, are you sleeping,
Garter snake, garter snake?
Time for hibernation.
What is your location?
In the mud, in a lake.

Are you sleeping, are you sleeping,
Toad and frog, toad and frog?
Time for hibernation.
What is your location?
In a pond, near a log.

Are you sleeping, are you sleeping,
Meadow mouse, meadow mouse?
Time for hibernation.
What is your location?
in a field, near a house.

Are you sleeping, are you sleeping,
Turtle friend, turtle friend?
Time for hibernation.
What is your location?
In the stream, till winter's end!
In the stream, till winter's end!
 

         Animals do many different, amazing things to get through the winter. Some of them "migrate." 

Some animals remain and stay active in the winter. They must adapt to the changing weather. Many make changes in their behavior or bodies. To keep warm, animals may grow new, thicker fur in the fall. On weasels and snowshoe rabbits, the new fur is white to help them hide in the snow. 

Animals may find winter shelter in holes in trees or logs, under rocks or leaves, or underground. Some mice even build tunnels through the snow. To try to stay warm, animals like squirrels and mice may huddle close together. 

Some animals "hibernate" for part or all of the winter. This is a special, very deep sleep. The animal's body temperature drops, and its heartbeat and breathing slow down. It uses very little energy. In the fall, these animals get ready for winter by eating extra food and storing it as body fat. They use this fat for energy while hibernating. Some also store food like nuts or acorns to eat later in the winter. Bears, skunks, chipmunks, and some bats hibernate. 

Cold-blooded animals like fish, frogs, snakes and turtles have no way to keep warm during the winter. Snakes and many other reptiles find shelter in holes or burrows, and spend the winter inactive, or dormant. This is similar to hibernation.