Elang adalah hewan berdarah panas, mempunyai sayap dan tubuh diselubungi bulu pelepah sebagai burung. Elang memakan tikus, tupai, kadal, ikan, ular dan ayam. Elang juga memakan serangga. Elang bereproduksi dengan cara bertelur. Pertumbuhan elang adalah dari telur menjadi bayi elang dan menjadi elang yang dewasa. Elang dapat terbang 65 km per jam.
How much do you like sports? My students, boys and girls do like them so much. They are fond of playing football after school. Well, boys and girls play together (grin). Therefore, our school arranges sport clubs for our students to fulfill their passion in sports specifically in football and badminton which are done every Saturday. These clubs are also aimed to develop their talents and skills and to teach them sportsmanship.
Valerian is one of our talented students who has made a nice progress in badminton club. He absorbs the lessons and techniques taught by the coach very well. Indeed, his coach said that he has gained good skills.
Well, I hardly know the skills in badminton (grin). You may directly check it out in this video.
We have known that asthma becomes one of the long term health risks of smoking.
What is asthma?
Asthma is a common condition that affects your airways and causes
difficulty with breathing. Most people with asthma who take the
appropriate treatment can live normal lives, but left untreated, asthma
can cause permanent damage to your airways. Very rarely, a severe asthma
attack can be fatal.
If you have asthma, your airways become irritated and inflamed. As a result, they:
become narrower
produce extra mucus
This makes it more difficult for air to flow in and out of your lungs.
Symptoms of asthma
Asthma symptoms may be mild, moderate or severe. They may include:
coughing
wheezing
shortness of breath
tightness in your chest
These symptoms tend to be variable – not everyone gets all the
symptoms and they may stop and start. They are often worse at night or
in the early morning.
Causes of asthma
The causes of asthma are not always clear. However, there are
often triggers that can result in a flare-up of symptoms. Common
triggers include:
respiratory infection – such as a cold or flu
irritants – such as dust, cigarette smoke and fumes
chemicals (and other substances) found in your workplace – this is called occupational asthma
allergies to pollen, medicines, animals, house dust mites or certain foods
exercise – especially in cold, dry air
emotions – laughing or crying very hard can trigger symptoms, as can stress
changes in the weather – especially changes in temperature
medicines – certain medicines can trigger
asthma. Most medicines are safe, but, if you have moderate to severe
asthma, it’s best not to take the painkillers aspirin and ibuprofen.
Beta-blockers, used to treat high blood pressure or angina, may make
asthma worse
In children, asthma is more common in boys than in girls but in
adults, women are more likely to have asthma. Asthma may run in
families.
If you smoke during pregnancy, your baby is more likely to get
asthma. If you smoke and have young children, they are more likely to
get asthma. Premature or low birth weight babies are also more likely to
develop asthma.
How an asthma attack occurs?
Watch the video below to see how an asthma attack occurs.
Every cook needs ingredients to make a meal. Consider a simple sandwich:
cheese, tomato, and all the ingredients that go into the bread: flour,
water, salt and yeast. Oh, and don’t forget the pickle. But if you’re a
plant, you’ll make your meal through photosynthesis—and all you’ll need
is a little light, water, and carbon dioxide.
Animals (including us!) need energy to grow and thrive. We get
that energy from eating food. Plants need energy, too, in order to grow
and reproduce. But plants make their own food through a process called photosynthesis.
The word photosynthesis contains clues to its meaning: the prefix photo comes from a Greek word meaning “light.” The root synthesis comes from another Greek word meaning “to put together.”
Through photosynthesis, plants use the energy of light to put a meal
together using water and carbon dioxide. To absorb the light, the plants
use chlorophyll, the pigment that makes leaves green.
The diagrams beside show how photosynthesis works.
A food web consists of all the food chains in a single ecosystem. Each living thing in an ecosystem is part of multiple food chains. Each food chain is one possible path that energy and nutrients
may take as they move through the ecosystem. All of the interconnected
and overlapping food chains in an ecosystem make up a food web.
Trophic Levels
Organisms in food webs are grouped into categories called trophic levels. Roughly speaking, these levels are divided into producers (first trophic level), consumers, and decomposers (last trophic level).
Producers Producers make up the first trophic level. Producers, also known as autotrophs, make their own food and do not depend on any other organism for nutrition. Most autotrophs use a process called photosynthesis to create food (a nutrient called glucose) from sunlight, carbon dioxide, and water.
Plants are the most familiar type of autotroph, but there are many other kinds. Algae, whose larger forms are known as seaweed, are autotrophic. Phytoplankton, tiny organisms that live in the ocean, are also autotrophs. Some types of bacteria are autotrophs. For example, bacteria living in active volcanoes use sulfur, not carbon dioxide, to produce their own food. This process is called chemosynthesis.
Consumers The next trophic levels are made up of animals that eat producers. These organisms are called consumers.
Primary consumers are herbivores. Herbivores eat plants, algae, and other producers. They are at the second trophic level. In a grassland ecosystem, deer, mice, and even elephants are herbivores. They eat grasses, shrubs, and trees. In a desert ecosystem, a mouse that eats seeds and fruits is a primary consumer.
In an ocean ecosystem, many types of fish and turtles are herbivores that eat algae and seagrass. In kelp forests, seaweeds known as giant kelp provide shelter and food for an entire ecosystem. Sea urchins
are powerful primary consumers in kelp forests. These small herbivores
eat dozens of kilograms (pounds) of giant kelp every day.
Secondary consumers
eat herbivores. They are at the third trophic level. In a desert
ecosystem, a secondary consumer may be a snake that eats a mouse. In the
kelp forest, sea otters are secondary consumers that hunt sea urchins
as prey.
Tertiary consumers
eat the secondary consumers. They are at the fourth trophic level. In
the desert ecosystem, an owl or eagle may prey on the snake.
There may be more levels of consumers before a chain finally reaches its top predator. Top predators, also called apex predators,
eat other consumers. They may be at the fourth or fifth trophic level.
They have no natural enemies except people. Lions are apex predators in
the grassland ecosystem. In the ocean, fish such as the great white
shark are apex predators. In the desert, bobcats and mountain lions are
top predators.
Consumers can be carnivores (animals that eat other animals) or omnivores (animals that eat both plants and animals). Omnivores, like people, consume many types of foods. People eat plants, such as vegetables and fruits. We also eat animals and animal products, such as meat, milk, and eggs. We eat fungi, such as mushrooms. We also eat algae, in edible seaweeds like nori (used to wrap sushi rolls) and sea lettuce (used in salads). Bears are omnivores, too. They eat berries and mushrooms, as well as animals such as salmon and deer.
Detritivores and Decomposers Detritivores and decomposers make up the last part of food chains. Detritivores are organisms that eat nonliving plant and animal remains. For example, scavengers such as vultures eat dead animals. Dung beetles eat animal feces.
Decomposers, like fungi and bacteria, complete the food chain. Decomposers turn organic wastes, such as decaying
plants, into inorganic materials, such as nutrient-rich soil. They
complete the cycle of life, returning nutrients to the soil or oceans
for use by autotrophs. This starts a whole new series of food chains.
Food Chains
Food
webs connect many different food chains, and many different trophic
levels. Food webs can support food chains that are long and complicated,
or very short.
For example, grass in a forest clearing produces
its own food through photosynthesis. A rabbit eats the grass. A fox eats
the rabbit. When the fox dies, decomposers such as worms and mushrooms
break down its body, returning it to the soil where it provides
nutrients for plants like grass.
This short food chain is one
part of the forests food web. Another food chain in the same ecosystem
might involve completely different organisms. A caterpillar may eat the
leaves of a tree in the forest. A bird such as a sparrow may eat the
caterpillar. A snake may then prey on the sparrow. An eagle, an apex
predator, may prey on the snake. A hawk, another apex predator, may prey
on the eagle. Yet another bird, a vulture, consumes the body of the
dead hawk. Finally, bacteria in the soil decompose the remains.
In
a desert ecosystem, an autotroph such as a cactus produces fruit.
Herbivorous insects, such as flies, consume the cactus fruit. Birds such
as the roadrunner consume these insects. Detritivores such as termites
eat the roadrunner after it dies. Bacteria and fungi help decompose the
remaining bones of the roadrunner. The carbon in the bones enriches the desert soil, helping plants like cactuses develop.
Algae and plankton are the main producers in marine ecosystems. Tiny shrimp called krill
eat the microscopic plankton. The largest animal on Earth, the blue
whale, preys on thousands of tons of krill every day. Apex predators
such as orcas prey on blue whales. As the bodies of large animals such
as whales sink to the seafloor, detritivores such as worms break down
the material. The nutrients released by the decaying flesh provide
chemicals for algae and plankton to start a new series of food chains.
Biomass
Food webs are defined by their biomass.
Biomass is the energy in living organisms. Autotrophs, the producers in
a food web, convert the suns energy into biomass. Biomass decreases
with each trophic level. There is always more biomass in lower trophic
levels than in higher ones.
Because biomass decreases with each
trophic level, there are always more autotrophs than herbivores in a
healthy food web. There are more herbivores than carnivores. An
ecosystem cannot support a large number of omnivores without supporting
an even larger number of herbivores, and an even larger number of
autotrophs.
A healthy food web has an abundance of autotrophs, many herbivores, and few carnivores and omnivores. This balance helps the ecosystem maintain and recycle biomass.
Animals get energy and nutrients by eating other animals or plants.
For example
caterpillars eat leaves
mice eat caterpillars
owls eat mice
These links between animals and plants are called food chains.
The arrow means 'is eaten by'.
Nearly all food chains start with a green plant.
Most animals and plants are part of more than one food chain.
Changes to food chains
If
one part of a food chain alters, the whole food chain is affected. For
example, if a disease suddenly wiped out caterpillars, it would affect
mice, owls and many other animals.
A FOOD CHAIN shows how each
living thing gets food, and how nutrients and energy are passed on from
creature to creature. Below is a basic example of a food chain.
The SUN is usually seen as the beginning of most food chains.
Nearly all of the energy used by living things on earth to survive originally came from the sun.
PRODUCERS, which are plants, produce their own food from sun, water, air (carbon dioxide), and soil through a process of photosynthesis.
CONSUMERS
, which are usually animals, consume other plants and animals.
An HERBIVORE only eats plants.
A CARNIVORE only eats meat.
An OMNIVORE eats both plants and animals.
DECOMPOSERS
, which include fungi, bacteria, and worms, eat
decaying plants and animals, and decompose them back into soil. The soil
can then be used by plants to grow.
Remember that many FOOD CHAINS make up a FOOD WEB.
Below is one example.
See how many different food chains can make up a food web?
Passive smoking is when smoke is breathed in by someone other than the
smoker. Passive smoking carries all the same health risks as smoking,
and it’s particularly dangerous for children.
Why is it so dangerous?
Tobacco smoke contains more than 4,000 harmful and addictive
chemicals, including nicotine, carbon monoxide and formaldehyde.
Second-hand smoke (also known as environmental tobacco smoke) is smoke
that comes from the burning cigarette (side-stream smoke) combined with
the smoke breathed out by the smoker (mainstream smoke). Side-stream
smoke makes up the majority of second-hand smoke and is more toxic than
mainstream smoke.
If you smoke indoors, it’s not enough to just open a window. This is
because the poisonous chemicals in smoke can stay in the air even after
you have finished your cigarette. And don’t think that hanging out of
the window will help – it won’t, and some research has shown that
second-hand smoke lingers on clothes, carpets, furnishings and walls.
This makes it almost impossible to keep second-hand smoke away from
other people.
What effects can passive smoking have on non-smokers?
Short-term effects
Being exposed to second-hand smoke is generally pretty unpleasant –
it may give you a headache, cough or sore throat. It can also irritate
your eyes and make you feel sick or dizzy. If you have asthma,
being in a smoky place may make your symptoms worse. And of course,
although the smell of smoke on your clothes and hair may be less serious health-wise, it’s often more irritating.
Long-term effects
If you're regularly exposed to second-hand smoke, your risk of
developing smoking-related diseases substantially increases. The World
Health Organization (WHO) estimates that second-hand smoke increases
your risk of heart disease and lung cancer by up to a third. Not only that, you’re more likely to develop chronic obstructive pulmonary disease, which causes problems with breathing.
Effects on children
Children who are exposed to second-hand smoke are at an increased risk of a number of serious conditions, including:
There is also some evidence to suggest that being exposed to
second-hand smoke may make existing conditions worse, decrease
children’s ability to smell and reduce mental development.
If you’re exposed to second-hand smoke while you’re pregnant, it can
lead to your baby having a low birth weight and he or she may not
develop properly before birth. Smoking during pregnancy also increases
the risk of cot death,
as does smoking near your baby after he or she is born. In addition,
women who breathe in second-hand smoke during pregnancy may have an
increased risk of still birth.
Your child is also three times more likely to start smoking if he or
she is exposed to second-hand smoke as a result of you smoking at home.
Produced by Polly Kerr, Bupa Health Information Team, October 2012.
This presentation is obviously simple but understandable. Do you agree? ;)
Well, you may also watch how she presents it. Play the video below to find out.
Here is another presentation!
THE LIFE CYCLE OF FROG by Nathaniel Situmorang.
He could make a quite different presentation from what I had made. He was really appreciated for that. ^^
So now we know that alcohol is a drug. But what exactly does it do to our body?
You must know this!
Short term effects
Right after someone has had a few drinks, alcohol can:
Make you feel sleepy, less coordinated, and slower to react to things
Cause your brain to feel foggy, and make you think and see differently
That's because alcohol is a type of drug known as a depressant that slows down your central nervous system.
You might see in movies or hear stories about people throwing up after
drinking a lot of alcohol. That happens when a person drinks more
alcohol at one time than his or her body can process, and because
alcohol has toxins in it that make us
feel sick (and usually, that sickness lasts until the next day,
otherwise known as a "hangover"). Sometimes, if a person drinks alcohol
while he's taking certain kinds of medication, he can have a bad
reaction and get physically ill.
Over the long haul
Years of drinking too much alcohol can really hurt your body. For instance:
Stomach and intestine problems
Liver damage
Weight gain
Nerve and muscle damage
Heart problems
Brain damage. Alcohol is very bad for your brain, and can cause
everything from blackouts to permanent loss of brain functions and
memory.
Cancer. Long term drinking has been linked to cancer of the throat, mouth, liver, esophagus and larynx.
Drinking alcohol can also lead to emotional and psychological problems
like sadness, depression, and even hallucinations (seeing and hearing
things that are not real).
More negative effects of drinking
Fetal Alcohol Syndrome. If a pregnant woman drinks too much alcohol,
it can seriously hurt her unborn baby and lead to birth defects.
Alcohol poisoning. Drinking a large amount of alcohol at one time can cause coma and death.
Alcohol and driving. Drinking alcohol makes it unsafe to
drive a car. Drinking and driving killed over 16,000 Americans in 2004,
and almost half of all car crashes involve drunk drivers.
There's a lot of information about alcohol out
there, and it can be really confusing. But here's an easy way to look
at the big questions and answers:
What is alcohol?
The simple answer: Alcohol is a drug.
The longer answer: Alcohol is a drug made when yeast (that stuff that makes bread rise) meets sugar (found in fruit or grains).
Yeast plus grapes equals wine
Yeast plus barley (a grain) equals beer
Yeast plus just about any plant containing sugar equals liquor (whiskey, vodka, rum, etc.)
What does alcohol do?
The simple answer: Alcohol makes you drunk.
The longer answer: Alcohol, like any other drug, has lots of effects on
the brain and body. One of the most obvious effects of alcohol is called
"intoxication," which is a fancy word for "being drunk." When you are
intoxicated:
Hello! Welcome back to our blog. It has been more than a month I post nothing here. My students keep asking me about that. (grin)I am so sorry, my kiddos. (bow)
Well, we are now in the second term. Let's begin this term with our activity in Science lesson. In the beginning of this term, students learned the life cycle of animals such as cat, fish, chicken, butterfly, frog and cockroach. I introduced the life cycle of frog to students through powerpoint presentation. By any chance, they liked it very much. They showed great enthusiasms as I assigned them to create a powerpoint presentation about the life cycle of an animal. Below is my presentation.
And, here you are...presented only to you, THE LIFE CYCLE OF ALLIGATOR by Valerian L. Tedja. What came to my mind about his presentation was that it is simple and quite attractive. Hope you agree with me. ^^
Have a happy learning!
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.
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.
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.
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)
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.
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.
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. Tedjadan 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.
Weekend is coming again. What do you do in the weekend most of the time? Hmm, let me guess. Some of you may go swimming, having lunch or dinner out with your family, going to movies, shopping at malls, etc. But, how many of you spend time reading in the weekend? Do you love reading? Or, you find reading is such a boring activity?
Well, visit our blog then you'll find reading is fun.
Read more to know more.
P.S : Remember to give your reaction - funny, interesting or cool.
Can you recognize the animals above?
Yup! chameleon (1) and salamander (2).
Which of the animal above is classified as an amphibian?; and
Which of the animal is classified as a reptile?
Can you discern the differences between amphibians and reptiles?
Find it difficult to discern?
Well, take a look to my students' journals to find.^ ^
I'm sure you'll find it easy to classify the animals above after that.
My student, Nathanael did.
He asked me that question during our discussion about reptile in Science lesson.
So, I searched it on internet and found this video.
The brain then works out what you are hearing.
