The Skeleton Facts

The Skeleton Facts

A big part of the body, the skeleton is what gives a frame on which the rest of the body parts hang = muscle, organs, skin. Bones also store a mineral called calcium, which is important for your nerves, heart, and other organs, as well as providing bones their "hardness." The bones of the skeleton grow continually from birth to about age 20 or 25. Broken bones will regrow until the broken ends come together. Read on for more fun and interesting skeleton facts!

Interesting The Skeleton Facts: 

• Although bones appear very hard, under the surface they are more like sponges, with lots of air. This makes bones very strong, but very light.  

• The adult human body has 206 bones in the skeleton. These bones are grown together from about 300 bones at birth!

• The spine, which runs down the center of the back, allows the body to bend forward, backward, side to side, and rotate to each side. It provides support for the entire upper body (everything above the hips), and also protects the spinal cord. 

• The ribs, which are in your chest, give support for your lungs, heart, and upper body muscles. One of the biggest jobs the ribs have is to protect the heart and lungs, and also the kidneys.

• The skull, which contains the brain and protects it, is made up of different bones which grow together during childhood. It has places for the eyes, and the ears, and only has one moving part = the lower jaw bone, called the mandible.

• The hands are made up of many different bones which allow a huge variety of movement. In fact, between the hands, wrists, and fingers, there are 54 bones! 

• The pelvis, which is the bowl-shaped structure that makes up the hips, attaches the legs to the spine. The pelvis supports the spine, which supports the entire upper body. The back of the pelvis is the sacrum, one of the strongest bones in the body. During pregnancy, the ligaments soften and get a little longer, allowing the bones of the pelvis to relax to fit a baby through. The special hormone that causes this to happen is called relaxin!

• The longest bone in the body is called the femur, which connects the pelvis to the knee. 

• The smallest bone in the body is in the middle ear, and is called the stapes, which is latin for stirrup (this bone is shaped like a stirrup). It is only 0.1 to 0.13 inches long!

• Bones are broken down and remade constantly, just like skin. In fact, all of the bones are slowly replaced until they are new bone once every 7 years!  

• The insides of some bones contain special material called bone marrow. Bone marrow has lots of cells which make red blood cells. Red blood cells carry oxygen all over the body. Every second, bone marrow produces two million red blood cells!

• The best way to look at bones is with a special photo called an X-ray. X-rays help tell doctors where a fracture is located, so they know where to put a cast. 
  
  
  Source : http://www.softschools.com      

Note for Fantastic 4 part 2

Hi Fantastics,

It's weekend again. You go nowhere? Don't know what to do? Willing to do some beneficial activities during your leisure time? Spend your some time visit the links below.  

http://www.softschools.com/grades/4th_grade/math/
http://www.softschools.com/science/

Have yourself a great practice!


Fantastic love,
       (^-^)
Ms. Venyde

Widget

Why are flamingos pink?

Flamingos are born with grey feathers that gradually turn pink because of the pigment canthaxanthin, which they obtain from their diet (brine shrimp and algae).

Read more: http://sciencefocus.com/qa/why-are-flamingos-pink via Focus

Image Beatrice the Biologist

Acrostic Poem- FITNESS by Ms. Veny de

Are you fit? I hope so (^-^)..

What is fitness?

Do visit this link to know http://www.cyh.com/HealthTopics/HealthTopicDetailsKids.aspx?p=335&np=285&id=1519

What do we gain from fitness?
This is what I gain..

F antastic YES..
I  ntelligence YES..
T emper badly NO..
N ervous NO..
E nthusiastic YES..
S trong YES..
S tay healthy YES..

ABSOLUTELY!

Now, make your own 'FITNESS' acrostic poem!

Allergies vs Sinus Infections: What’s the Difference?

Colds, allergies, and sinus problems can cause similar symptoms, so it’s hard to properly self-diagnose and treat your condition. Seeing a doctor for a proper diagnosis is a simple solution.

By Dr. David Bortniker
In recent years, doctors have become increasingly frustrated with patients self-diagnosing everything from a simple headache to congestive heart failure.  Since medical information is so easily accessible online now, the temptation to self-diagnose is very strong, which can pose serious health threats, such as improper treatment.
One very common and often misleading self-diagnosis is distinguishing whether we have allergies or a sinus infection (sinusitis).  In a recent survey of over 600 asthma and allergy patients, researchers from the Asthma and Allergy Foundation of America found that about half of the patients self-diagnosed their symptoms as allergies, when they were actually infected with sinusitis.
As you can see below, colds, allergies, and sinus problems can cause similar symptoms, so it’s hard to properly self-diagnose and self-treat your condition.  Seeing a doctor for a proper diagnosis is a simple solution to finding the right treatment.

The Common Cold

• Description: A viral infectious disease that affects the upper respiratory system
• Symptoms: Congestion, difficulty breathing, runny nose, fatigue
• Onset: Within 1-3 days of exposure to the virus
• Duration: 5-7 days

Allergies

• Description: Your body is attacking allergens, therefore producing histamine, which causes symptoms to appear and triggers mild to severe reactions
• Symptoms: Congestion, difficulty breathing, watery or itchy eyes, sneezing, itchy nose, throat and eyes, wheezing, runny nose
• Onset: Immediately after exposure to allergen, or at the same time each year if seasonal
• Duration: As long as you’re exposed to the allergen, or dependent upon treatment

Sinusitis

• Description: Infection in the sinus cavities because of inflammation caused by viruses, bacteria, fungi, allergies or environmental factors
• Symptoms: Congestion, headache, pressure in the face, facial tenderness, loss of taste or smell, chronic fatigue, fever, cough, nasal drip
• Onset: May develop after a cold or can be triggered by allergies
• Duration: A few weeks to years, depending on proper treatment

So, when should you see a doctor?  If your symptoms worsen after 7 days or if you’re suffering from a fever, you should schedule an appointment with your physician.  People suffering from chronic sinus infections tend to misdiagnose their condition as allergies or effects of the common cold, missing out on advanced treatment options, including minimally invasive sinus surgery, which can help to relieve discomfort long-term.  While there are at-home therapies to help relieve pressure and pain, your healthcare professional will be able to properly diagnose and treat your individual condition. 
David Bortniker, M.D., is an ear, nose and throat specialist who performs minimally-invasive sinus surgery at Somerset Medical Center.

Source : Somerset Medical Centre's Blog
Credit :http://bridgewater.patch.com/groups/somerset-medical-centers-blog/p/bp--allergies-vs-sinus-infections-whats-the-difference

Sinuses

Probably, you still remember one of my students, Nathanael. He has a lot of questions in his head. He always addresses me a question as I enter the classroom in the morning. Frankly to say, sometimes I'm so much clueless about the answer (grin). So, I encourage him to search the answer on internet and share to others via blog. Great! He does it indeed (smile).

Well..
Last Tuesday, he came to me and told me that he found information about sinusitis on a website. He was interested in it because he was once diagnosed from sinusitis and saved it in his notebook. He showed it to me and wished it to be posted in our blog.

This is the information he really wants to share with us.

The sinuses are a connected system of hollow cavities in the skull. The largest sinus cavities are around an inch across; others are much smaller. The sinus cavities include:

• The maxillary sinuses (the largest), in the cheekbones.
• The frontal sinuses, in the low-center of the forehead.
• The ethmoid sinuses, between the eyes, at the nasal bridge.
• The sphenoid sinuses, in bones behind the nasal cavity.

The sinuses are lined with soft, pink tissue called mucosa. Normally, the sinuses are empty except for a thin layer of mucus.

The inside of the nose has ridges called turbinates. Normally these structures help humidify and filter air. The nose is divided in the center by a thin wall, called the septum. Most of the sinuses drain into the nose through a small channel or drainage pathway called the middle meatus.

The purpose of the sinuses is unclear. One theory is that sinuses help humidify the air we breathe in; another is that they enhance our voices.

Sinus Conditions

• Acute sinusitis (sinus infection): Viruses or bacteria infect the sinus cavity, causing inflammation. Increased mucus production, nasal congestion, discomfort in the cheeks, forehead or around the eyes and headaches are common symptoms.

• Chronic sinusitis (or chronic rhinosinusitis): More than just a series of infections, chronic sinusitis is a persistent process of inflammation of the sinuses.

• Allergic rhinitis: Allergens like pollen, dust mites, or pet dander cause the defenses in the nose and sinuses to overreact. Mucus, nasal stuffiness, sneezing, and itching result.

• Deviated septum: If the septum that divides the nose deviates too far too one side, airflow can be obstructed.

• Turbinate hypertophy: The ridges on the nasal septum are enlarged, potentially obstructing airflow.

• Nasal polyps: Small growths called polyps sometimes grow in the nasal cavity, in response to inflammation. Asthma, chronic sinus infections, and allergic rhinitis can lead to nasal polyps.

Credit : http://www.webmd.com/allergies/picture-of-the-sinuses

Exercise To Happy Healthy Heart

You may have read a post of ours entitled "Heart Your Heart"... I bet you have known the importance of this wonderful organ. Do you know the ways to have a happy healthy heart?

Well, my fourth grade students have discussed and explored more about exercise during Health Education lesson. They understand very well that regular exercises contribute good benefits not only to their body and soul but also to their heart.

Let's see what they think of exercises that can help them have a happy healthy heart.

Do you agree with us? So, exercise every day. You need to exercise your heart by making it work harder for at least 30 minutes a day. If your heart is healthy, you'll be happy.

 Fantastic ^^

HOW EAR WORKS?

Did you hear something? Maybe the sound you heard was as quiet as your cat licking her paws. Or maybe it was loud, like a siren going by. Sounds are everywhere, and you have two cool parts on your body that let you hear them all: your ears!

Your ears are in charge of collecting sounds, processing them, and sending sound signals to your brain. And that's not all — your ears also help you keep your balance. So if you bend over to pick up your cat, you won't fall down — or even worse — fall on your cat. Meow!

The ear is made up of three different sections: the outer ear, the middle ear, and the inner ear. These parts all work together so you can hear and process sounds.

Outer ear

The outer ear is called the pinna or auricle (say: or-ih-kul). This is the part of the ear that people can see, and also the ear canal. They act like a funnel to catch sound waves and direct them to the ear drum.

(A canal is a pathway for water, but the ear canal is a pathway for sound)

 

Middle ear

This is a small air-filled space on the inside of the eardrum.

There are 3 tiny bones called ossicles (oss-ik-uls) in this part.

They are called the hammer, anvil and stirrup (because that is what they look like).

When the sound waves move the eardrum, these bones move and pass on the vibration to the very much smaller oval shaped window of the cochlea (the bit that looks like a shell). The hammer is touching the ear drum so it shakes when the sound comes through, and the movement goes right through the anvil to the stirrup, which is touching the window of the cochlea.

Inner ear

The cochlea has fluid in it, which moves due to the vibrations and bends hairs on the outside of cells lining the cochlea. There are about 17,000 hair cells in each ear, so they really are tiny. They are not like the hair on your head

Some of these hair cells (the 'inner hair cells') create an electrical impulse (signal), which is sent along the auditory nerve to the brain. Most of them (the 'outer' ones), however, are like tiny muscle cells, which react to the vibrations in the fluid by trembling and shaking; in this way they work like high quality amplifiers and make the vibrations much stronger and clearer for the smaller number of inner hair cells.

The brain then works out what you are hearing.

The semi-circular canals in your inner ear contain fluid too. They send messages to your brain to help you keep your balance when you move.

Hearing

If your ears are working well, you hear sounds all the time. You can't switch your ears off, even when you are asleep.

Credit :  

http://www.cyh.com/HealthTopics/HealthTopicDetailsKids.aspx?p=335&np=152&id=1463#top

http://kidshealth.org/kid/htbw/ears.html

HEART YOUR HEART

Did you give your friends valentines and little heart-shaped candies on Valentine's Day? Do you ever cross your heart when making a promise that you really, really mean? Or turn on the radio to hear a guy singing about his broken heart? We see and hear about hearts everywhere.

A long time ago, people even thought that their emotions came from their hearts, maybe because the heart beats faster when a person is scared or excited. Now we know that emotions come from the brain, and in this case, the brain tells the heart to speed up. So what's the heart up to, then? How does it keep busy? What does it look like? Let's find out.

What it looks like
 
Your Heart is about the same size as a pear. It sits behind your sternum and your ribs on the left side of your body just next to your sternum.
It has four parts,, the left ventricle (say ven-trik-ul)and the right ventricle which are both at the bottom of the heart, and the atrium (say ay-tree-um) and the right atrium at the top.
The heart is two pumps join together.

What it does

The walls of the heart are made of really strong muscles that squeeze and relax to pump blood around the body.
It does this about 90 times a minute if you're a child and 70 times a minute if your are an adult.
 
 
Blood is pushed from the atriums into the ventricles on each side of the heart.
Between them, small valves open and shut with each heartbeat so the blood can only flow in one direction.
The left side of the heart gets the blood from the lungs where it has collected oxygen, and pushes it all round the body through the arteries and the tiny blood vessels called capillaries (say cap-il-a-rees). This blood is a bright red colour.
The right side of the heart gets the blood after it has taken oxygen round the body and sends it back to the lungs for some more oxygen. This blood is carrying carbon dioxide (say car-bon dye-ox-eye-d), which gets breathed out when it reaches the lungs. This blood looks a darker red colour.
So the main job of the heart is to pump blood to every part of the body. The blood carries oxygen and all the food, vitamins and minerals that your body needs to move, think, grow and repair itself. At the same time the blood picks up stuff that your body doesn't need and takes it to those parts of your body that get rid of waste (your lungs, kidneys and liver).
Your blood is pumped all around your body and gets back to your heart in about a minute.

Keep Heart Happy

Most kids are born with a healthy heart and it's important to keep yours in good shape. Here are some things that you can do to help keep your heart happy:

• Remember that your heart is a muscle. If you want it to be strong, you need to exercise it. How do you do it? By being active in a way that gets you huffing and puffing, like jumping rope, dancing, or playing basketball. Try to be active every day for at least 30 minutes! An hour would be even better for your heart!

 

• Eat a variety of healthy foods and avoid foods high in unhealthy fats, such as saturated fats and trans fats (reading the labels on foods can help you figure out if your favorite snacks contain these unhealthy ingredients).
• Try to eat at least five servings of fruits and vegetables each day.
• Avoid sugary soft drinks and fruit drinks.
• Don't smoke. It can damage the heart and blood vessels.

So now you know that your heart doesn't look like a valentine, but it sure deserves to be loved for all the work it does. It started pumping blood before you were born and will continue pumping throughout your whole life.
 

You should know:

The changes in the heart and blood vessels which cause heart attacks in adults are now starting in many more children and young people. They won't have a heart attack while they are kids, but some of the damage is done then.
Keep your heart healthy by eating healthy food, exercising, getting plenty of sleep and having fun!





Credit : 
http://www.cyh.com/HealthTopics/HealthTopicDetailsKids.aspx?p=335&np=152&id=1446
http://kidshealth.org/kid/htbw/heart.html#

Simbiosis

Simbiosis berasal dari bahasa Yunani sym yang berarti dengan dan biosis yang berarti kehidupan. Simbiosis merupakan interaksi/hubungan timbal balik antara dua organisme/makhluk hidup yang hidup berdampingan.

Simbiosis merupakan pola interaksi yang sangat erat dan khusus antara dua makhluk hidup yang berlainan jenis. Makhluk hidup yang melakukan simbiosis disebut simbion.

Ada beberapa bentuk simbiosis yakni:

• Mutualisme adalah hubungan sesama makhluk hidup yang saling mengntungkan kedua pihak. Contoh:                                                                                                                                           

Kerbau memperoleh keuntungan dengan habisnya kutu – kutu yang menempel di tubuhnya, sedangkan burung jalak merasa untung karena mendapatkan makanan berupa kutu.

• Parasitisme adalah hubungan antara dua makhluk hidup yang mengakibatkan salah satu makhluk hidup mendapatkan keuntungan sedangkan makhluk yang satunya mengalami kerugian. Contoh:

Jamur dan Lumut kerak

Jamur pada lumut kerak berfungsi sebagai pelindung dan penyerap air serta mineral. Ganggang yang hidup di antara miselium jamur berfungsi menyediakan makan melalui fotosintesis. Lumut kerak adalah organisme hasil simbiosis mutualisme. Jamur pada lumut kerak tidak dapat hidup sendiri di alam. 

• Komensalisme adalah di mana pihak yang satu mendapat keuntungan tapi pihak lainnya tidak dirugikan dan tidak diuntungkan (netral). Contoh:

 

Tanaman Pakis mendapatkan keuntungan berupa rumah tinggal, sedangkan inangnya tidak mendapatkan keuntungan apapun dan tidak dirugikan.

• Amensalisme yaitu saat satu pihak dirugikan dan pihak lainnya tidak diuntungkan maupun dirugikan. Contoh: jamur penicilium menghasilkan antibiotik penisilin yang dapat membunuh bakteri. jamur tidak mendappatkan apa-apa, tapi bakteri dirugikan.

• Kompetisi, di mana kedua pihak saling merugikan, biasanya terjadi melalui kompetisi dalam memperebutkan makanan. Contoh: zebra dan rusa di hutan sabana.

• Netralisme, di mana kedua pihak tidak saling diuntungkan maupun dirugikan. Interaksi antar kedua spesies tidak menyebabkan keuntungan maupun kerugian bagi keduanya. Contoh: kambing dan ayam yang ada di peternakan.
 

Berikut ini adalah contoh-contoh simbiosis lainnya yang berhasil dikumpul oleh siswa-siswi saya dari beberapa sumber di internet.

Simbiosis Mutualisme:

1. Interaksi antara protista Flagellata di dalam tubuh rayap. Flagellata membantu rayap untuk mencerna kayu melalui proses pelapukan. Flagellata mendapat makanan dari rayap. -Nathaniel dan Gracia-
2. Kupu- kupu dan bunga. Kupu-kupu memerlukan makanan yang dihisapnya dari bunga dan bunga memerlukan kupu-kupu untuk membantu proses reproduksi. Kupu-kupu membawa serbuk sari bunga dan akan mencari bunga-bunga lain sehingga terjadilah proses penyerbukan alami. -Nourma dan Michelly-
3. Buaya dan burung plover. Buaya membiarkan burung plover memakan kotoran-kotoran pada giginya yang berfungsi untuk mencegah infeksi. Burung plover juga diuntungkan karena mendapat makanan. -Valerian dan Felicia-
4. Manusia dan bakteri baik. Bakteri baik akan menguntungkan untuk usus manusia karena memperoleh vitamin B12, sementara bakteri tersebut diuntungkan karena mendapatkan tempat hidupnya. -Valerian dan Felicia-
5. Jamur dan alga. Jamur dapat menahan air dan mineral sehingga lingkungan menjadi lembab. Alga dapat melakukan dapat melakukan fotosintesis, hasil fotosintesis kemudian dimanfaatkan oleh jamur. -Clarissa dan Karina-

Simbiosis Parasitisme:

1. Cacing pita dalam tubuh manusia. Larva cacing pita masuk ke dalam tubuh manusia yang mengkonsumsi makanan yang berasal dari daging terutama daging sapi atau babi yang dimasak tidak sampai matang. Larva berkembang menjadi cacing pita dewasa di dalam usus manusia.  -Valerian dan Felicia- 
2.  Benalu dan tumbuhan inang (tumbuhan yang ditumpanginya). Benalu hidup menempel pada tumbuhan inang uuntuk menggambil air dan mineral dari dalam tubuh inangnyamenggunakan akar isap (haustonum). -Valerian dan Felicia-
3. Rafflesia dan tumbuhan inang. Tumbuhan ini tidak memiliki akar, batang dan daun, tetapi mempunyai tabung-tabung yang dapat yang dapat menembus jaringan pada tumbuhan inangnya. Dengan perantaraan tabung-tabung itu , Rafflesia sp. menyerap zat-zat makanan yang dibutuhkan dari tumbuhan inangnya. -Karina dan Clarissa-
4. Tali putri dan tumbuhan inang. Tali putri mendapat tempat hidup dan menyerap sari makanan dari tumbuhan inangnya. Andrea dan Daniel-  

Simbiosis Komensalisme:

1. Bakteri pembusuk dan usus manusia. Bakteri pembusuk yang hidup pada usus besar manusia menyerap zat-zat makanan yang sudah tidak dapat dicerna oleh tubuh kita. Bakteri tersebut mendapat keuntungan tetapi tidak merugikan manusia yang ditumpanginya. -Nathanael dan Alma-
2. Ikan remora dan ikan hiu. Ikan remora melekatkan tubuhnya pada tubuh ikan pari dengan menggunakan sirip punggung yang telah berubah menjadi alat penghisap. Ketika ikan hiu memperoleh mangsa, ikan remora akan mendapat sisa-sisa dari mangsa ikan hiu tersebut. Di samping itu, karena melekat pada tubuh ikan hiu, ikan remora akan aman manakala ada ikan lain yang akan memangsanya. -Euodia dan Poggy.
3. Anggrek dan pohon inang. Anggrek biasanya menempel pada bagian atas batang pohon agar cahaya mendapatkan cahaya matahari yang cukup untuk melakukan fotosintesis. -Andrea dan Daniel-

Termasuk simbiosis apakah yang terjadi antara ikan badut dan anemon laut?

Ikan badut hidup secara simbiosis mutualisme dengan anemon. Simbiosis mutualisme artinya cara hidup bersama antara dua makhluk hidup secara saling memberikan manfaat satu sama lain. Anemon adalah jenis tumbuhan laut yang memiliki tentakel beracun. Tumbuhan ini adalah karnivora (pemakan hewan) yang melumpuhkan ikan dengan racun pada tentakelnya. Ikan badut dapat mengatasi racun anemon dengan membuat dirinya tidak dikenal sebagai makhluk asing. Saat pertama kali menempati suatu spesies anemon beracun ikan badut akan berusaha menyesuaikan diri dengan tentakel dengan mengikuti gerakan tentakel dan kemudian membiasakan diri menyentuh tentakel. Hanya beberapa spesies anemon tertentu yang akan ditempati oleh ikan badut. Ikan badut mendapatkan manfaat dari anemon berupa makanan dan perlindungan dari predator yang tidak akan mengejarnya di dekat anemon, sedangkan anemon mendapatkan pembersih tubuh dari sisa makanan dan tentakel yang sudah mati.   

Semoga bermanfaat..(^-^)
Sumber : www.google.com

Perayaan HUT Indonesia ke-68 Ala SD SWASTA BATARI

Beragam kegiatan/perayaan pun kerap dilakukan untuk memeriahkan ulang tahun kemerderkaan Indonesia. Tak terkecuali kegiatan-kegiatan serta perlombaan- perlombaan yang dilakukan di sekolah kami SD SWASTA BATARI. Kegiatan wajib yang dilakukan adalah upacara penaikan bendera. Nathaniel Situmorang, siswa kelas 4 menjadi pemimpin upacara untuk kali kedua. Sementara pasukan pengibar bendera adalah oleh siswa-siswi kelas 2. Meski mereka masih duduk di kelas 2 tapi usaha mereka patut diacungkan jempol. Kegiatan upacara penaikan bendera ini pun diisi dengan kegiatan-kegiatan pendukung lainnya seperti drum band oleh siswa-siswi kelas 5, pianika oleh siswa- siswi kelas 4 dan angklung oleh siswa-siswi kelas 3 yang mengiringi paduan suara oleh siswa-siswi kelas 1. Beberapa perlombaan masih sama seperti tahun sebelumnya seperti lomba makan kerupuk, lomba kelereng, lomba tarik tambang dan yang tak ketingggalan adalah lomba menghias kelas. Tahun lalu, kelas saya meraih peringkat pertama tapi tahun ini saya dan murid- murid sangat puas dengan peringkat kedua. Ada perlombaan yang baru di perayaan tahun ini yaitu lomba membuat bendera (untuk siswa-siswi kelas 1 dan 2) dan membuat puisi ber-tema-kan kemerdekaan (untuk siswa-siswi kelas 3, 4 dan 5). Pada kesempatan ini, saya ingin mengekspresikan rasa bangga saya pada salah satu siswi saya yang bernama Claudia Niken Barito atas keberhasilannya meraih peringkat pertama dalam lomba membuat puisi. Selain Claudia, ada beberapa siswa-siswi kelas 4 yang menulis puisi dengan sangat bagus di antaranya adalah puisi-puisi karya Karina Saniya Jusuf, Valerian L. Tedja dan Euodia Graceia Saragi. Puisi-puisi tersebut merupakan karya asli mereka. Besar harapan kami melalui kegiatan-kegiatan seperti ini akan menumbuh-kembangkan patriotisme dan rasa nasionalisme dari generasi-generasi penerus bangsa seperti mereka.

KARYA : CLAUDIA NIKEN BARITO

KARYA : KARINA SANIYA JUSUF

KARYA : EUODIA G. SARAGI

KARYA : VALERIAN L. TEDJA

PIANIKA (KELAS 4)

JUARA 2

Salam Merdeka!

Kelas 4
SD SWASTA BATARI

Dirgahayu Indonesiaku ke-68!

Bulan Agustus merupakan bulan yang sangat bersejarah bagi bangsa Indonesia. Kenapa begitu? Ada yang tahu? Yup..di bulan Agustus tepatnya tanggal 17 Agustus 1945, bangsa Indonesia memperoleh kemerdekaannya.

Indonesia mengukir kisah perjuangan yang panjang dalam perjalanannya. Kemerdekaan yang kita dapatkan sekarang bukanlah semudah membalikkan telapak tangan. Bangsa Indonesia dulu dijajah oleh negara lain. Di antaranya adalah Belanda dan Jepang. Perlu kita ketahui bahwa penjajahan Belanda di Indonesia jauh lebih lama dibandingkan penjajahan Jepang. Belanda menjajah Indonesia selama lebih kurang 3,5 abad atau 350 tahun. Setelah penjajahan Belanda berakhir, Indonesia pun kembali dijajah oleh bangsa Jepang selama 3 tahun. Kita semua pasti bisa bayangkan betapa mencekamnya kehidupan bangsa kita pada saat itu.

Tidak terasa sudah 68 tahun bangsa dan negeri kita tercinta ini merdeka, bebas dari belenggu penjajahan. Nah, sudah sepatutnya kita sebagai anak-anak bangsa mengisi kemerdekaan dengan cara belajar yang giat dan semangat dan melakukan hal-hal positif.

DIRGAHAYU REPUBLIK INDONESIA KE-68!!

Salam Merdeka

Kelas 4
SD SWASTA BATARI

Have you ever made a water cycle model? If no, you may try this activity. After that, take the quiz to see how much you know about water cycle.

Good Luck!! ^^

Water Cycle Activity

Water Cycle Quiz   credit : http://www.abcwua.org/education/WaterActivities.html

The Water Cycle

Visit the link below to learn the water cycle visually:

http://www.epa.gov/safewater/kids/flash/flash_watercycle.html

Enjoy it!! ^^

The blood vessels

The blood vessels found in human heart.

Credit : AsapSCIENCE

Your Amazing Brain

You carry around a three-pound mass of wrinkly material in your head that controls every single thing you will ever do. From enabling you to think, learn, create, and feel emotions to controlling every blink, breath, and heartbeat—this fantastic control center is your brain. It is a structure so amazing that a famous scientist once called it "the most complex thing we have yet discovered in our universe."

Human Brain Diagram

Our brain controls everything we do. 

Your brain is faster and more powerful than a supercomputer.

Your kitten is on the kitchen counter. She's about to step onto a hot stove. You have only seconds to act. Accessing the signals coming from your eyes, your brain quickly calculates when, where, and at what speed you will need to dive to intercept her. Then it orders your muscles to do so. Your timing is perfect and she's safe. No computer can come close to your brain's awesome ability to download, process, and react to the flood of information coming from your eyes, ears, and other sensory organs.

Your brain generates enough electricity to power a lightbulb.
 
Your brain contains about 100 billion microscopic cells called neurons—so many it would take you over 3,000 years to count them all. Whenever you dream, laugh, think, see, or move, it’s because tiny chemical and electrical signals are racing between these neurons along billions of tiny neuron highways. Believe it or not, the activity in your brain never stops. Countless messages zip around inside it every second like a supercharged pinball machine. Your neurons create and send more messages than all the phones in the entire world. And while a single neuron generates only a tiny amount of electricity, all your neurons together can generate enough electricity to power a low-wattage bulb.

Neurons send information to your brain at more than 150 miles (241 kilometers) per hour.
 
A bee lands on your bare foot. Sensory neurons in your skin relay this information to your spinal cord and brain at a speed of more than 150 miles (241 kilometers) per hour. Your brain then uses motor neurons to transmit the message back through your spinal cord to your foot to shake the bee off quickly. Motor neurons can relay this information at more than 200 miles (322 kilometers) per hour.

When you learn, you change the structure of your brain.

Riding a bike seems impossible at first. But soon you master it. How? As you practice, your brain sends "bike riding" messages along certain pathways of neurons over and over, forming new connections. In fact, the structure of your brain changes every time you learn, as well as whenever you have a new thought or memory.

Exercise helps make you smarter.
 
It is well known that any exercise that makes your heart beat faster, like running or playing basketball, is great for your body and can even help improve your mood. But scientists have recently learned that for a period of time after you've exercised, your body produces a chemical that makes your brain more receptive to learning. So if you're stuck on a homework problem, go out and play a game of soccer, then try the problem again. You just might discover that you're able to solve it.

Source: http://kids.nationalgeographic.com/kids/stories/spacescience/brain/

Put your thinking cap on and see how many questions about brain you can answer.
Take the Quiz on:
http://kids.nationalgeographic.com/kids/games/puzzlesquizzes/quizyournoodle-the-brain/

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The Water Cycle

Note for Fantastic 4

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Get yourself fascinated by visiting the link below:

http://www.nationalgeographic.com


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