Sunday, May 6, 2012

SEED PLANTS



Welcome back to my post.  Today, I am going to talk more about plants.  To be more specific, "Seed Plants" !  Before I started my post, I headed outside and looked around at the plants in my neighborhood.  While I was walking around and looking, I tried to come up with answers to the characteristics of seed plants.  I looked, touched and smelled and I noticed things that I never saw before.  I wish I could have done some tasting, especially my neighbor's peaches but I did not want to get into trouble.

I saw different stems, roots, leaves and vascular tissue.  I saw for the first time "What makes a plant a seed plant?".  I saw tall pine trees, apple and pear trees, cedar trees, tulips, lilies, ivy and palm trees and many more.  Did you know that there are over 250,000 species of seed plants in the world?  Most of the plants around us are seed plants. 

Characteristics of Seed Plants
These are the must haves for a plant to be called a seed plant.  Pay close attention!, because there  are no exceptions to these rules.  Here goes my list:
1.  Leaves - All seed plants must have leaves.  This is the organ of the plant that traps sunlight to make food through photosynthesis.
Different types of leaves.


2.  Stems - All seed plants must have stems.  Stems are the above the ground parts of a plant that support the leaves and flowers.  Stems also move nutrients between the roots and the leaves. Stems can be either:
      A.  Herbaceous - Soft and green like the stems of flowers.
      B.  Woody - Solid like the trunk of a tree.  

A Woody and Herbaceous stems side by side. 

3.  Vascular Tissue -   All seed plants must have vascular tissue.   This tissue transports food throughout the plant.  The vascular tissue of seed plants are:

     A.  Xylem - Transports nutrients and water up from the roots.
     B.  Phloem - Moves food from the leaves to other parts of the plant. 
     C.  Cambium - Produces additional xylem and phloem. 

 

4.  Roots - All seed plants must have roots.  The water and minerals used by the plant enter the plant through the roots.  Roots also anchor the plant in the soil and prevent the plant from being blown or washed away.  Roots can be:
      A.  Tap Root - It has a primary root with secondary roots attached and grows deep down into the soil.
      B. Fibrous Root - Do not have a primary root and lie close to the surface of the soil.
      C.  Adventitious Root - Needed to help the plant climb.  This is the roots we see in ivies.




5.  Seed - All seed plants must have seeds.  I know that this one was obvious.  These plants produce seeds which are the reproductive part of this plant.  Seed producing plants are divided into two groups called Gymnosperms and Angiosperms.

These are Coconut seeds



What Are Gymnosperms and Angiosperms?
The major differences between a Gymnosperm and an Angiosperm is that the Gymnosperm do not produce flowers but an Angiosperm do.  Also, Angiosperm's seeds are enclosed inside fruit.

The oldest trees in the world today are Gymnosperms.  Gymnosperms are vascular plants that produce seeds without an outer fruit.  Its seeds are inside cones.  Gymnosperms have leaves which are needlelike or scalelike.  Examples of Gymnosperms are pine, cedar, juniper and fir trees. 

This a cone on a pine tree.


Angiosperms plants come in may shapes and colors.  They are flowering plants that reproduce from seeds that are in fruits.  I found out that all the delicious fruit I love to eat like grapes, strawberries and pears are all Angiosperms.  Over half of all plant species in the world are Angiosperms.  Examples of Angiosperms are pear, tomato, apple, orange and peach trees.

A tomato fruit with the seeds on the inside.

Did you know that Gymnosperms and Angiosperms provide many benefits to us?   Gymnosperms plants produce wood used in construction and many paper products we use.  It also produces chemicals for soap, paints and medicines.  Angiosperms trees take in huge amounts of the carbon dioxide gas during photosynthesis and releases oxygen for us to breathe.  They also produce many fibres such as cotton which is used in clothing. Also materials found in Angiosperm plants are used in rubber, oils, perfumes and pesticides.




Monocotyledon and Dicotyledon
We use these two hard to pronounced words when talking about Angiosperm plants.  You must be wondering what on earth do these words mean.  I almost bit my tongue trying to pronounce these words and still don't know how to say them.  But one of the great things about the English language is that we always find a short version for words that are impossible to pronounce.  Now, how about  Monocots and Dicots?  That is much better to pronounce.

I have a clue for you.  Remember in Language Arts class we learned about Greek prefixes.  The prefix "mono" means  one and "di"  means two, so we now know that we are talking about numbers here.   Also, a cotyledon is something that is inside of a plant seed.  It is the first baby leaves that a newborn plant will have.  When the seed is planted and it bursts out, the cotyledon will be able to absorb the sunlight and help the plant make its own food to grow the plant.  By just looking at a plant you can easily tell whether it is a Monocot or Dicot.


What Makes a Plant a Monocot or a Dicot?


Monocots Characteristics
1.  Monocots have seeds that have only one cotyledon.
2.  They also have petals in 3s or a multiples of 3. 
3.  The veins in the leaves are parallel or side by side.
4.  There are vascular bundles scattered throughout the plant's stem.

 

There are about 65,000 types of Monocot species in the world.  Examples of Monocots are lilies, palms, onions, asparagus, sweet potatoes and all grasses such as rice, corn and wheat.
 
Onion Plants

Rice Plants

Dicots Characteristics
1.  Dicots have seeds that have two cotyledons.
2.  They have petals in 4s, 5s or a multiples of 4 and 5. 
3.  The veins in the leaves branch out and then join back together to form net like patterns.
4.  There are vascular bundles arranged in the plant's stem like spokes on a wheel .


 

There are about 170,000 species of Dicot species in the world.  Examples of Dicots are poison ivy, cacti, oaks, roses, apples, tomato, grapes, cabbage and pistachios.


Poison Ivy Plants
 
Cacti Plants

Thanks for stopping by to read my latest post.  I had tons of fun learning and preparing for this post.  I am beginning to see plants in a whole different way.  I hope that you enjoyed my post and learned something new about plants.  Check out my trees jokes.


Q: What kind of tree can fit into your hand?
A: A palm tree!

Q: How do trees get on the internet?
A: They log in.

Come back to visit soon ...........


 



Friday, April 27, 2012

PLANTS






Hey, I made it back to the future!!!  You see, I just got back from a trip to prehistoric time in my time machine.  I went to find out where the first plants came from.  I went back 300 million years to find out the answer, but when I got there I saw plants everywhere.  Well since I need a quick answer for science class, I will head to the internet and my science textbook.  I found out that nobody knows the answer for sure, but scientist have strong evidence to come up with an answer.  According to scientist, 3000 million years ago green algae was the first living organisms to appear which resembled a plant.  Oh, now I see where I went wrong, I did not go back far enough in my time machine.

The green algae is not a plant but a type of protists.  When it appeared the green algae was a one-cell organism that lived in the ancient seas.  This one-celled organism then started developing thick cell walls and the green color known as chlorophyll which helped them to make food from the air, water and soil.  Did you know when the green algae first appeared on Plant Earth the atmosphere was unlivable for all creatures which breathe oxygen?  Back then the air was only carbon dioxide, a gas with is deadly to us but needed by the green algae.  Then this green algae through photosynthesis was able to clean the atmosphere and fill it with oxygen for future organisms to appear.  Slowly over time, I mean millions of years,  the green algae was was able to leave the water and adapt to land growing and producing multi-cell organisms known as plants.  Thanks green algae for helping evolution to happen. 

Since the green algae is still in our seas today, scientist used the following evidence to come up with the conclusion of where plants came from.  
1.  The green algae and plants have a similar cell wall.
2.  The green algae and plants both contain chlorophyll.
3.  The green algae and plants both store their energy in the form of starch.
4.  The green algae and plants have the same life cycle.
5.  The green algae and plants are similar in color.

This is a picture of green algae which covered a beach in China.  Although it looks scary, it is harmless and the kids are having fun swimming in the green algae.

Check out all this green algae!


What are the Characteristics of Plants?

What makes a plant a plant????? These are the following characteristics of a plant:

1.  Multi Cellular - This means all plants have many cells.  Plant cells have a cell wall made of cellulose which gives plants its ridge shape.  This is a plant cell.




2.  Eukaryotic Cells - This means that the plant cells have successfully adapted to life on land.  Plants cells allow them to be able to live in the most extreme environments.  You can find plants from Antarctica to the hot and dry deserts of Africa.

Plants in the desert.

3.  Chlorophyll - Plants have a green pigment called chlorophyll.  With Chlorophyll plants are able to make their own food using sunlight and carbon dioxide.

This is chlorophyll under a microscope.


4.  Cuticles - Have you every looked at a leaf closely?  You will notice this waxy layer on the leaf.  Well, plants have a waxy layer that coats the stems and leaves, and other parts of the plant that protects it from exposure to the air and sun.

Notice the shine from the waxy coating on the leaf.



What is the difference Between Vascular and Non Vascular Plants?

You see, all plants are broken down into two main groups.  They are known as Vascular or Nonvascular.  Don't worry, I too had never heard of these terms until I started learning about plants.  But once I explain what they mean, it should be very easy.


Did you know that vascular plants make up about 80% of all plants?  Well what makes a plant Vascular is the special tissue in its stem.  This tissue allows water and nutrients to move up and down the plant.  It is sort of how our blood vessels allow blood to move up and down our body to provide the nutrients and the oxygen we need to survive.  This up and down movement of water and nutrients help the plant to grow and get bigger and bigger.  Examples on Vascular plants is an Orchid and the Red Oak Tree.
 
This is an Orchid flowering plant.


This is a Red Oak Tree.



Now on to Nonvascular plants.  Since you know what vascular plants are, well Nonvascular is simple.  Basically, non vascular plants do not have the special tissue like Vascular plants to move water and nutrients up and down the plant.  I know that you must be wondering.   Well how do they grow?   Since they do not have this special tissue they have to be able to feed and drink when the environment provides it.  Have you ever noticed moss only grows where it is always moist.  Examples of Nonvascular plants are Moss and Liverwort.  


I am sure you have seen this.  This is Moss.
 
This is Liverwort.


The Three Differences Between Vascular and Nonvascular Plants are:


1.  Vascular Plants have roots but Nonvascular plants do not.
2.  Vascular Plants have stems to take water and nutrients up and down the plant but Nonvascular plants do not.
3.  Vascular plants have leaves to take up water and Nonvascular plants do not.


Remember, I told you that this would be easy.


I hope that you have enjoyed my post on plants.  I learned a lot preparing for this post, I hope you learned something new.  Until my next post, bye and I hope to see you soon.  Hasta La Vista.





Monday, March 12, 2012

MAMMALS R US


Hey,  we have been having lots of fun talking about the Animal kingdom for the whole school year.  Well, today we are going to talk about the final class called mammals.  Did you know that there were over 4000 species of mammals in the world?  There are mammals which live on land, in water and even fly.  We are  going to cover the five characteristics that all mammals share, the different types of mammals and my favorite mammal.  

The five characteristics that all mammals have are:  
  1. All have hair or fur. - This hair or fur may cover part or all of the mammal's body. It is used to protect and keep the mammal warm. There are also mammals who have sensory hairs which are called whiskers. These whiskers help them to feel their surroundings and to sense danger.
  2.  All females have mammary glands. - Mammary glands are the glands that help the females to produce milk to feed their babies.
  3.  All are endothermic. - This means that they are all warm blooded animals.
  4.  All are vertebrates. - This means that they all have back bones.
  5.  All have body systems developed to help them survive. - Mammals can learn and remember better than any other type of animal and this makes them superior. They have a nervous system which has a brain, nerves and spinal cord. They all have four chambered hearts and blood vessels.

In what ways are Birds and Mammals Simalar?
  1. They are both vertebrates and endothemic.
  2.  Some mammals like bats have wings like birds.
  3.  Some mammals like bats also have hollow bones which allow them to fly just like birds.
  4.  Some mammals have beaklike mouths like birds.
  5.  Some mammals lay and incubate eggs like birds.

  

What are Placental Mammals, Monotremes and Marsupials?
Well, you see mammals are divided into three groups based on how their babies develop.  The three groups are called Marsupials, monotremes and placental mammals.

Marsupials are what you would called pouched mammals.  Basically, they all have pouches which are sort of like a pocket on their bellies.  These pouches are used to carry, protect and feed their babies.  They give birth to very small immature babies and those babies grow and develop in the mother's pouch.  Examples of marsupials are kolas, kangaroos, Tasmanian devils, wallabies and opossums. 

This adult Koala is a marsupial.


Monotremes are what you would call, egg laying mammals.  Although, the females lay eggs they are not birds.  Its eggs have a tough leathery shell just like the eggs of reptiles.  These are a very unusual or strange group of mammals.  The adults have beaklike mouths.  The females produce milk, but do not have nipples, but instead the milk come from mammary glands scattered all over her skin. Examples of monotremes are spiny anteaters and duckbilled platypus.

This adult Spiny Anteater is a monotremes
 We are all placental mammals.  What I mean is that humans are placental mammals.  The babies develop inside of the mother.  The babies are attached to the placenta, which is a saclike organ which provides the baby with oxygen and food from the mother's blood.  Placental mammals are mammals whose young are born very developed.  Examples of placental mammals are dogs, horses, cows, cats, monkeys and lets not forget humans.
Cover image expansion
This adult tiger is a placental mammal.


Let's Talk About The Little Babies


Placental  babies are born very developed.  They are fully developed inside the mother.  After the babies are born the mother will feed it with milk from its mammary glands. This milk will provide nutrients to help them to continue to grow and develop.
  
Baby Orangutan

Marsupials babies are born very underdeveloped and are about the size of a honeybee.  After the babies are born they crawl into the their mother's pouch and attached themselves to the nipple of the mother. There they will continue to grow and develop.
Baby Kangaroo in its mother's pouch

Monotremes babies are hatched from eggs laid by its mother.  After the babies are hatched, they feed by licking the milk from the mother's skin.  Some monetremes' mothers have pouches to protect and keep their babies safe.

Baby Platypus






















My Favorite Mammal

Can you guess what my favorite mammal is?  Let me give you some hints.  He likes to eat a lot, he has his own TV show and has been in movies.  He is black and white and he knows Kung Fu, especially how to do the wishy washy finger.



 

If you said Po the Panda you were right. This is my favorite mammal.
 

giant panda animal rare animal in zoo wallpaper
This is a Giant Panda
The first time I saw a Panda up close, I was about four years old and went to visit  Zoo Atlanta.  I remember buying a stuffed panda, because I wanted to have my own soft and fluffy panda.  The Giant Panda is one of the most well known endangered animals.  It is almost entirely vegetarian unlike its carnivorous relatives, the bear.  It spends about 12 hours a day siting down and eating bamboo.  They eat about 40 pounds of bamboo each day.  They are really good climbers and can be easily recognized by the black patches around their eyes, ears and body.  Giant pandas have become endangered partly because of hunting, but mainly because their natural habitat of central China has been slowly destroyed.  Although scientist are trying to save the Giant Panda by capturing them and putting them into reserves to live, but is very hard to get them to have babies.  When baby pandas are born they are about 3 inches long and feed on their mother's milk until they are about nine months old.  Did you know that female pandas are called sows, and males are called boars?


Fun Facts About Mammals

Fastest mammal - The cheetah can run up to speeds of 60-70 miles per hour.
Slowest mammal – The sloth moves at less than 1 mile per hour. That is super slow.
Biggest mammal – The Blue Whale.
Biggest land mammal- The African Elephant.
Tallest mammal - The giraffe.
Smallest mammals - The pygmy shrew weighing .11 ounce.  It weighs less than half an ounce, this is super small.
Loudest mammal - The Blue Whale and the second loudest is the Howler Monkey.
Smallest newborns - Marsupials.
Smelliest mammal - The striped skunk
The only venomous mammals – The male duckbilled platypus and several species of shrews.
Fatest mammal - The blue whale has the thickest layer of blubber.

Run !!!!!  Hold your nose!!!!!!  Here comes the Striped Skunk.


Someone holding a shrew.  It is super small.  A finger is bigger than the shrew.



Thanks for reading and I hope you enjoyed my post.  Come back to visit.  Adios mis amigos!!!!!




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Wednesday, February 29, 2012

Social Studies Time - The Tuskegee Airmen

  



We are switching it up a bit.  Today, we are going to talk about the Tuskegee Airmen. I know this is a Science blog, but in honor of Black History Month we are going to have some SOCIAL STUDES TIME


The question of the day is:Who are the Tuskegee Airmen?
Well, the Tuskegee Airman were the first group of elite African-American pilots to serve as military aviators in the U.S armed forces. They were pioneers for the equality and the integration of the Armed Forces. The Tuskegee Airmen included 996 pilots and more than 15,000 ground personnel of navigators, bombardiers, maintenance and support staff and instructors.

Tuskegee Airmen pose in front of a P-40 fighter in 1942 or 1943

The main flight training for for the Tuskegee Airmen took place at the Division of Aeronautics at the Tuskegee Institute in Alabama. The U.S Air Corps built a separate facility at the Tuskegee Army Air Field to train the pilots. Eleanor Roosevelt played a major role in establishing the training facility. The First Lady, Eleanor Roosevelt was very interested in the work at the Tuskegee Institute, especially at the aeronautical school. In 1941 she visited Tuskegee. When she was there, she got in the back seat of a plane which was flown by a black pilot called Charles Alfred. Against the wishes of the Secret Service agents and President Roosevelt, she flew about half an hour over Tuskegee , Alabama. When she landed, Mrs. Roosevelt was convinced that black pilots could fly. When Mrs. Roosevelt returned to Washington, she convinced her husband to allow the first Negro Air Corps pilots to be trained at Tuskegee Institute.



This is the field in Tuskegee Alabama where the airmen trained.

A trip that would help change history. First Lady Eleanor Roosevelt and “Chief” Charles Alfred Anderson in 1941.

Although the Tuskegee Airmen proved to be dedicated, determined and superior military pilots they were still in segregated units and could not fight alongside their white countrymen. They did not only have to battle enemies during the war, but they also had to fight against racism and segregation. Many people and military officials did not want blacks to become pilots. They had to train in overcrowded classrooms and airstrips, and suffered from the racist attitudes. Although the Tuskegee Airman suffered many hardships, they proved themselves to be world class pilots.
  
During the time of the Tuskegee Airmen places like this were very popular through out the United States.


The Tuskegee Airmen was nicknamed "Red Tail Angels" because they had red paint on the propeller and tail of their planes and the bombers they escorted thought that they were like angels.


The Tuskegee Airmen escorting a bomber Plane.

When the war ended, 992 men had graduated from Negro Air Corps pilot training at Tuskegee and 450 of these men were sent overseas for combat assignment. There were also 150 Tuskegee Airmen who lost their lives while in training or on combat flights.

The Tuskegee Air men destroyed or damage over 409 German airplanes, 950 ground units, and sank a battleship destroyer. They also had over 200 bomber escort missions during World War II.


Please enjoy watch the clips on the Tuskegee Airmen.

 
 
The is a clip from the US Air Force


Currenty there is a movie at the theaters about the Tuskegee Airmen. This is the trailer.



This is a clip in the words of some of the original Tuskegee Airmen.




On Monday, February 27, 2012 my class visited the Atlanta History Center for our field trip. I enjoyed the field trip very much especially when we played the civil war game. In the game, I played a character whose name was William Carney. William was part of the 54th Massachusetts Infantry. In the game, I had to make many decisions. For each decision I made, I could gain or lose points and these points will determine if I lived or died. My decisions were not that great because my character ended up going insane and dying.

I learn quite a bit on the field trip. The things that stuck with me the most was that many people died in Word War II. Also, during slavery black people could work better in the sun because the color of their skin protected them from getting sun burnt. Finally, during the Civil War the northern and southern states were divided because of slavery. The northern states wanted to abolish slavery but the southern sates wanted to keep slaves to work on the plantations.


This is the Atlanta History Center.



Monday, February 27, 2012

Birds And More Birds



Welcome back to my blog!  We have finally gotten to my favorite group of animals. I thought we would never get here.  We see these animals all around us. We may call them the flying feathered ones or just birds.  Today, you will learn about what all birds have in common, what are the different feather types and how a bird is able to fly. 

What makes a bird a bird?????
Is it singing ability?  Is it dancing ability? 



 Well, these are four characteristics shared by all birds:
1.      They all are endothermic and vertebrates
2.      They all have wings
3.      They all have bills or beaks
4.      The females all lay eggs to reproduce

Endotherms and Vertebrates
All birds are endotherms and vertebrates.  This means that they all have a back bone and they keep their bodies at a constant internal body temperature of about 40 degrees Celsius. 


Wings
Not all flying animals are birds and not all birds can fly. I hope that I did not confuse you.  Think about this, Bats fly but they are mammals and not birds.  Look at the ostrich, it is a bird but it cannot fly.   All birds have wings but some wings are developed to help the bird fly but others are not.  Flying birds' wings are shaped to provide lift.  Flightless birds like the penguins may not be able to use their wings to fly but it comes in handy to help them swim fast.
 Look at those HUGE wings of the Bald Eagle!  It is the national bird of America.




 I may not be able to fly but I am one quick swimmer, thanks to my wings.
 



Bills and Beaks
No toothbrush or toothpaste for these animals, lucky birds.  They don’t have to worry about cavities because birds don’t have any teeth.  Birds have what you call bills or beaks.  Their bills or beaks are made of the protein keratin and come in many shapes and sizes depending on what they eat. Herons beaks are sharp and pointed to help them catch fish. Finches have short cone shaped beaks for cracking open seeds.  Bills and beaks can be very dangerous weapons, so stay away.  I will never forger screaming and being chased down the street by a goose which was trying to peck me.
Look at the Herons sharp beak !!!

Check out the cone shaped beaks of the finches !!!


Lay Eggs
Which came first, the chicken or the egg? Pick me, I know the answer. How about both. There is not a correct answer to this question. All birds lay eggs to reproduce. Female birds lay their eggs in a nest and sit on them to incubate them. These egg shells have to be strong enough so the mother does not break it by accident. Eggs shells are made of calcium carbonate which is the same chemical that seashells are made of.


This is a chicken nest.


What are Contour Feathers and Down Feathers?


If you look closely at a chicken or any other bird’s body you will notice that there are two types of feathers. These feathers are called contour feathers and down feathers. Contour feathers are the strong and lightweight feathers. They are very colorful, smooth and sleek shape. If you have ever seen a Native American headdress you will notice lots of beautiful and colorful contour feathers. Down feathers are the soft and fluffy feathers closest to the skin which keep birds warm. Did you know that Down feathers are also used by people to stay warm? Down feathers are very fluffy and warm in pillows and comforters but if you suffer from allergies like I do, stay away. Check out this Native American Headdress with colorful
contour feathers.

  







 How Are A Bird's Feathers, Air Sacs, and Skeleton Adapted for Flight?
Man has always wanted to fly like the birds. Although the airplane was invented, man is still not happy and is continuing to invent things like jet packs to try to be like the birds. In order for a bird to fly it must have a very light and strong skeleton, wings and feathers. Contour feathers allow birds to fly. These feathers are lightweight and are located on the bird’s wings and tail to help it steer and not tip over. In order to get up and stay in the air a bird has to be light. I mean light as a feather. That is why most of a bird’s bones are hollow and filled with air sacs.
A bird's light and hollow bone. A bird's wing covered with feathers.


I Really Like This Bird?
I like the Sulfur-Crested Cockatoo because it can imitate people talking and it can be an excellent pet. The first time I saw a Sulfur-Crested Cockatoo was in the movie Rio. Do you remember that evil bird? The Sulfur-Crested Cockatoo has a bright yellow crest and the rest of his feathers are white which is a very unusual color for a parrot. You see, parrots are the world most colorful birds however, the Sulfur– Crested Cockatoo is not so much. This bird lives in a range of different habitats. You can find it from forest to farmland, roosting high in eucalyptus trees. This bird’s home is Australia, New Guinea and New Zealand.

These are two Sulfur-Crested Cockatoos.


Here is the Sulfur Crested Cockatoo from Rio.





What is Georgia State Bird?

The official bird of the State of Georgia is the Brown Thrasher. Brown Thrashers are what you would call a copy cat. They mimic the calls of other birds. They are heard before they are seen. You can find them in dense vegetation, fields, and woods looking for food on the ground. These birds are extremely secretive and it can be hard to find them. This would definitely explain why I have lived in Georgia all my life and have never seen one of these birds.

Sorry Mr. Brown Thrasher, I have never met you.




Please come back to visit and check out my bird joke!!!!!!!!


Q: If a rooster lays an egg on the middle of a slanted roof, on which side will it fall?

A: Neither side. Roosters don't lay eggs!

Friday, February 24, 2012

Sharks

Today I am going to talk about sharks, yes Sharks! Everytime you talk about sharks you think about these
vicious, unstoppable, killing machines well actually their pretty cool.