Are you more like your mom or your dad?

It's Parents' Day!

I sat down and thought about what is it that I could share as I've been thinking about my parents and me, and my husband as parents to our children. It took me a few days to get an idea. Then something came to my mind. I was wondering why my daughters have brown eyes while my son has black eyes. I continued my investigation by asking a few of my colleagues, "Are you like your mother or your father?". Here are their answers;

Maya: "I look exactly like both of my parents, I don't know how that's possible."
Iman: "I look exactly like my mom!"

Azhar: "I can't even count how many times I have heard, "Wow! you look just like your dad!" I've heard it from my family, friends and also strangers."

Iza: "I've been told that i look like my father."

Ruby: "Apparently I look like my mom but act like my dad."

Annuar: "People say my siblings and I look alike. My eldest brother is always told he resembles our dad. My little brother looks like my mom. The other 5 of us are a mix between our dad and mom. One common feature is we all have the black hair and brown eyes."

Well, it is interesting to listen from them. Sometimes, a person looks like the mother, sometimes a person also could look just like the father and sometimes a person looks like a combination of both parents. Still trying to figure out how come a person could look nothing like either of the parents but he or she is identical to his or her great grandmother? The answer is genetics!

Many would be surprised at how random genetics actually are. Everything from our hair color to our blood type is determined by genes. A combination of our parent's genes and all of their parent's genes combine to determine traits.

A dominant gene always overpowers a recessive one. For example, my husband has brown eyes which is the dominant eye color trait and i have black eyes which is recessive. That is probably why my daughters have brown eyes.

When the parents' DNA combines, we only get one set of genes for a particular physical trait from either the mother or father. We have a fifty-fifty chance of receiving one or the other so it is completely random. We may also receive mostly our father's genes and look exactly like him. Maybe someone might receive a mixture from both and look like a cross between both parents. That is why sometimes a person doesn't look identical to his or her brothers and sisters, unless he or she is a twin. It is even possible for someone to inherit most of his or her genes from the father's mother in which case he or she will look nothing like either parent. This happened with my little daughter who could be our great grandmother's twin if they were the same age. For me, I look identical to my father.

This also means that my daughter inherited her brown eyes from my husband. She also has curly hair as it is different to my straight hair. In this case she must have got my husband's mother's hair type.

It's amazing. So if you are wondering why you look like your mother while your sibling looks like your father, it's all because of genetics.

Here you are. It's me, my husband and our children! No matter who we look like, we must appreciate our family relationship. And always remember, who and what we are now, all comes from our parents.

Posted by Ayu
Learning Specialist, Petrosains

 

Bugs for Breakfast Anyone?

Malaysians are a passionate bunch when it comes to food. We take great pride in our cuisine and meals are always much-anticipated. From the cheap and plentiful to the celebratory and occasional treat, good food gets us going, excited, and happy beyond being just fuel for our body.

By Takeaway (Own work) [CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0) or GFDL (http://www.gnu.org/copyleft/fdl.html)], via Wikimedia Commons 

When it comes to food, Malaysians delight in national staples like nasi lemak or satay, rich laksa, roti and curries, steaming char kue tiao, crunchy pisang goreng, and kuih aplenty. The list is long and seemingly endless and in our towns and cities, we are spoilt for choice with stalls, cafés and restaurants easily accessible and often open late into the night or even round the clock.

Our choice and preference for food is often influenced by geography, culture, and beliefs among other things. So it’s not surprising that what we like and enjoy may not be equally appreciated by tourists and visitors (just as not all Malaysians enjoy sashimi, spaghetti carbonara, or a tostada). Similarly, there are some food items that although common in other parts of the world (even as close as our neighbouring country Thailand), but may be viewed with disgust and revulsion if served here – such as a delicious plate of fried grasshoppers. 


By Thomas Schoch [CC-BY-SA-2.5 (http://creativecommons.org/licenses/by-sa/2.5)], via Wikimedia Commons 

The Practice of Eating Insects

We may be annoyed by ants, freaked out by cockroaches, and terrified of spiders but rarely if ever salivate over the idea of eating insects. The human consumption of insects as food is known as entomophagy and it is a fairly widespread practice in some cultures though in many others often uncommon or viewed with disgust. In a recent report by the Food and Agriculture Organisation of the United Nations¹, some interesting insect-eating facts emerge:

• Around 2 billion people consume insects in some way
• Humans consume over 1,900 different insect species
• The most commonly consumed insects are beetles, followed by caterpillars.
•  Insects are a highly nutritious and a healthy food source

Even though the benefits of entomophagy is quite established, will you consider insects for a meal as seen in this dish (below) of fried insects in Cambodia?


By Steve Baragona [Public domain], via Wikimedia Commons 

What are Insects?

If you’re still thinking about chowing down on some caterpillars, consider first what insects are. We often call all forms of creepy crawlies as insects though there is a specific definition to what an insect is. Examples of insects include beetles, flies, moths, and wasps – can you think of what they have in common?


By Bugboy52.40 (Derivative from images uploaded by Fir0002.) [CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0) or GFDL (http://www.gnu.org/copyleft/fdl.html)], via Wikimedia Commons 

Here are some necessary features that all insects share:

• Insects are invertebrates – they have no backbone.
• Insects have an exoskeleton – a hard external covering which protects their body.
• Insect bodies are made up of three segments – the head, the thorax, and the abdomen.
• Insects have 3-pairs of jointed limbs.
• Most insects have compound eyes and a pair of antennae.

Insects belong to a larger group of animals called arthropods. Other than insects, which are often differentiated by their bodies which have three segments and six legs, examples of arthropods include arachnids like spiders and scorpions, as well as crustaceans like crabs and lobsters. Centipedes and millipedes are also arthropods.

CONSIDER THIS:

We already consume many kinds of arthropods such as crabs, shrimp, and lobsters. If you think of a spider as a 'land crab', or an insect as a variation of delicious 'seafood', does it make it more appetising? Also we consume many products made by insects, most famously honey which are made by bees.

Why Eating Insects May Be Important

The report by the Food and Agriculture Organisation of the United Nations¹ offers three main reasons why we should consider eating insects:

1. For health reasons as insects are healthy and nutritious, and are good replacements to current protein sources such as meat and fish.
2. For the environment as rearing insects for food is less damaging to the planet than livestock like chicken because it requires less space, emit less greenhouse gases like methane, and requires less food to grow.
3. For the economy as it provides new job opportunities as starting an insect-rearing ‘farm’ is much less expensive and less complicated than rearing livestock.

Consumption of other arthropods specifically arachnids like spiders (shown below) and scorpions too have the same benefits as eating insects. Arachnids are just not technically insects.


By A. www.viajar24h.com (http://flickr.com/photos/soschilds/375166267/) [CC-BY-2.0 (http://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons

We Are Already Eating ‘Insects’

Even with all the goodness of entomophagy established, most people will still not choose to eat insects whether due to personal, cultural, or religious reasons. However, what people don’t often know is that in most of the foods we already consume, there are already unavoidable but small quantities of insects whether in part or whole. The Defect Levels Handbook²published by the U.S. Food and Drug Administration presents a list of food items with natural or unavoidable ‘defects’, usually referring to the addition of unwanted objects such as insects, rodent filth, or mold.

Examples are:

• Ground cinnamon: Average of 400 or more insect fragments per 50 gram²
• Chocolate: Average is 60 or more insect fragments per 100 grams²
• Curry powder: Average of 100 or more insect fragments per 25 grams²
• Canned mushrooms: Average of over 20 or more maggots of any size per 100 grams of drained mushrooms and proportionate liquid²
• Peanut butter: Average of 30 or more insect fragments per 100 grams²
• Ground pepper: Average of 475 or more insect fragments per 50 grams²

The food items however are still safe to eat, so don’t be worried!

So when you're out shopping for groceries in the future, don't be too surprised to see insects at the supermarket!

Posted by Daniel
Petrosains

¹Edible insects: Future prospects for food and feed security - http://www.fao.org/docrep/018/i3253e/i3253e00.htm

²Defect Levels Handbook, U.S. Food and Drug Administration http://www.fda.gov/Food/GuidanceRegulation/GuidanceDocumentsRegulatoryInformation/SanitationTransportation/ucm056174.htm

Congak Competition at Petrosains

As you read the title, I believe some of you might have confused 'Congak' with 'Congkak', which are really two very different things but which I myself was confused with at the beginning. Congak is a Malay word which refers to the practice of 'mental mathematics'. Perhaps you might now be wondering what mental mathematics is, so let me help you clarify. Mental mathematics or mental math for short is the ability to do arithmetic calculations accurately without using any pen, paper, calculator, computer or any electronic devices. Basically you're counting 'in your mind' and don't be surprised but excellent mental math practitioners can solve fairly difficult problems very quickly. I met a ten year old kid who could answer the question of 1435x132 accurately in just a few seconds! 

I remembered growing up how popular mental mathematics was as a learning program and the concept was even advertised on television by many different companies. It used to be thought that being good at mental math afforded many other benefits and advantages to students. I myself tried to improve my mental math back then but these days, I find it much easier just to use a calculator and with almost everyone having a mobile phone, a calculator is always on hand.

Recently, Petrosains organised a Congak Competition as the centre celebrates all things mathematical. A total of 40 participants from Standards 4 & 5 from several schools took part in the Congak Competition. They were the ones who scored highest for the Congak Math quiz during Petrosains’ on-going thematic program, the Magical Math that involved 2525 students from 38 schools. 

The competition consists of a series of challenges, the first of which was called 'Calculate It'. Participants were challenged to solve 30 arithmetic questions with only 20 seconds alotted per question. Each of them was provided with an answer sheet for them to write the answers while the mathematical problems was splashed on screen.

Participants in deep focus as they attempt the first challenge.

The second challenge was a crowd favourite. If you love board games then I am sure you would love this too. The second challenge was presented in a board game format, and the game is called 'Math Magic Challenge'. The game is easy to learn but thrilling nonetheless requiring various skills such as good calculating skills, a sound strategy, and the ability to think fast!

 

A participant making a move on the board.

Think! Think!

For the third and final challenge, only five participants with the highest scores from the first two challenges took part. The final challenge was broken up into three parts, all variations of mental math activities requiring participants to solve given problems in increasing order of difficulty.

 

The judges for the day.

Supporters, teachers and parents watching the finalists on stage.

 

After the intense but exciting finals, the Congak Competition culminated with a big win by a student from SK Bandar Baru Sri Damansara (1)! The prize giving ceremony was inaugurated by the head of Majlis Guru Besar of the Petaling Zone, Selangor. For winners, keep up the good work and for those who didn't win, don't give up and keep trying. Mental Math is all about practice, practice, practice!

 

The first place winner!

Participants of the Congak Competition.

Shared by Ruby, Intern at Petrosains

Jelajah Petrosains ke Pedalaman!

'Hidup Memerlukan Pengorbananan. Pengorbanan Memerlukan Perjuangan. Perjuangan Memerlukan Ketabahan. Ketabahan Memerlukan Keyakinan'. Inilah mutiara kata yang dipegang oleh setiap warga kerja Petrosains yang bergelar fasilitator sains kerana sanggup berkorban demi mendidik anak-anak bangsa kaum pribumi di Sabah dan Sarawak.  Siri jelajah ke kawasan pedalaman ini adalah program Petrosains-PETRONAS Science Educamp. Penjelajahan bermula dari tahun 2005 sehingga sekarang dan pastinya akan diteruskan pada masa akan datang.

Program Petrosains-PETRONAS Science Educamp ini dikhaskan untuk para pelajar di kawasan-kawasan pedalaman di negeri Sabah dan Sarawak. Di antara kawasan pedalaman yang pernah dijelajahi adalah di Mukah, Bario, Long Lama, Long Bedian, Long Napir dan banyak lagi.

Inilah gambaran perjalanan yang dilalui oleh fasilitator-fasilitator sains ke salah satu destinasi pedalaman mereka. Dari Kuala Lumpur terbang ke Sibu. Dari Sibu pergi ke Daro. Sekurang-kurangnya 3 jam lagi perjalanan menaiki pacuan empat roda di atas jalanraya yang tidak rata. Demi niat murni untuk berkongsi ilmu dengan masyarakat pribumi, perjalanan diteruskan lagi. Mereka terpaksa meredah dan menyeberangi sungai menaiki feri atau bot-bot kecil sebelum sampai ke destinasi. Namun begitu, pengisian program selama 4 hari 3 malam ini pastinya meninggalkan pelbagai kenangan manis dan pahit. Melalui program ini para pelajar dan guru-guru memperoleh manfaat daripada pembelajaran sains berasaskan 'hands-on'. Program ini selalunya boleh menampung penyertaan 100 orang pelajar sekolah rendah dan diiringi oleh 7 orang guru.

Mereka yang tinggal di kawasan pedalaman sering beranggapan sains itu sukar. Pendekatan pembelajaran melalui 'hands-on' mampu menarik minat para pelajar melalui aktiviti sains menggunakan bahan-bahan yang mudah diperolehi seperti botol plastik, kotak, penyedut minuman dan suratkhabar. Secara tidak langsung  ia juga dapat memberi idea baru kepada guru-guru untuk mengunakan bahan dan sumber yang terdapat di sekeliling di dalam bilik darjah. Dengan cara ini, ia mampu mewarnakan lagi teknik pengajaran dan pembelajaran di sekolah-sekolah. Sebagai contoh, aktiviti membina lampu suluh dengan menggunakan botol air terpakai di samping mempelajari konsep sains elektrik dan sekaligus melatih kemahiran saintifik termasuk menggalakan para pelajar untuk berfikiran kritis dan kreatif. Namun,cabaran utama ketika mengendalikan program adalah bahasa. Ini adalah kerana mereka menggunakan bahasa kaum mereka sendiri. Misalnya kaum iban bertutur dalam bahasa iban. Dengan pertolongan daripada guru-guru sebagai penterjemah bahasa, program ini mampu diteruskan.

Sudah semestinya pelbagai cabaran yang terpaksa diharungi ketika menjalankan tugas  ke kawasan-kawasan pedalaman ini. Namun, ia akan memberi rasa kepuasan apabila melihat sendiri anak-anak pribumi ini berjaya kelak. Pastinya memori indah terpahat pada kanak-kanak ini kerana mereka adalah di antara golongan yang jarang mendapat peluang untuk menonjolkan keupayaan mereka di mata dunia.

Kesan-kesan yang diperoleh melalui program ini tentunya positif. Guru-guru berkongsi maklumat  mengatakan bahawa para pelajar sudah mula meminati subjek sains. Ada yang dahulu seorang pendiam, kini sudah berani untuk mengangkat tangan di dalam bilik darjah untuk menjawab soalan. Menurut guru-guru juga,  program ini juga telah menunjukkan yang para pelajar sudah mula rajin untuk ke sekolah tanpa dipaksa. 

Sentiasa berterima kasih dengan apa yang kita ada pada hari ini kerana ada ramai lagi insan lain di luar sana yang masih berada dalam keadaan kekurangan. Pengalaman ke kawasan pedalaman ini juga sedikit sebanyak memberi iktibar kepada kita semua. Ia juga membuka mata kepada golongan yang lebih berkemampuan supaya sentiasa menghargai apa yang ada di depan mata. Petrosains dengan sokongan PETRONAS akan sentiasa menjalankan usaha-usaha ini untuk menyumbang balik kepada komuniti dalam bidang pendidikan dan pembelajaran tidak formal.





Posted by Ayu
Learning Specialist, Petrosains

The Carnivorous Pitcher Plant

HotScience │Petrosains

 

  Venus Fly Trap

The Venus fly trap has parts of the plant move to capture its prey. What about the pitcher plant?  There’s no major movement by the Venus fly trap actually - it just generate electrical charges when an object sits on it, triggering its ‘jaws’ to quickly shut.  The sneaky pitcher plant on the other hand uses its sweet smelling juice to lure its prey.  Once in the ‘belly’, the trapped prey is at the mercy of the acid that is secreted in it! 

Carnivorous Pitcher Plants

 The Pitcher Plant is actually a leaf that used to be harmless but due to its attempt to survive in unfavourable conditions, it evolved into its current form. The pitcher plants belong to two large families of monocots—the Nepenthaceae (Old World) and Sarraceniaceae (New World). The Old World pitchers live high above a tree. Because there is not much food source up there, the plant resorts to find an alternative source of nutrients.  It folds the ends of its leaves like a cup, produces sweet juices and waits for its victims.

Meanwhile the New World family members have more food source as it stays on ground. So
these pitchers actually form a whole pitcher out of its leaf.

What’s the difference between regular plants and the carnivourous pitcher plants?  Regular plants consume nutrients from the soil.  Carnivorous pitcher plants are found in nutrient-poor soil; hence they get their nutrition from insects they prey on.

Little explorers earnestly checking out the Pitcher Plant with the hand lens.

Pitcher plant discussion with Mr.Gary The Naturalist

This article is written in conjunction with Science Engagement Session by
Gary @ Khaeril Zach Abdullah (EDUTREE Services Sdn. Bhd) at
HotScience, Petrosains from 26-31 March 2013

Petrosains Visits GHKL's Pediatric Ward

In conjunction with the holy month of Ramadan and the end of Petrosains’ Monsters University Count the Monsters Contest, staff of Petrosains paid a visit to the children warded at the Pediatric Institute of General Hospital Kuala Lumpur on 15 July 2013, in a bid to bring cheer to their day by giving away presents and spending time with them.

We were warmly greeted by Nurse Norhafizah bt Samian, Head Nurse and Dr. Norzilah Haji Mohamed Zainudin, Senior Pediatric Specialist of the Pediatric Institute, who gave us a short briefing on the history and background of the Pediatric Institute.

The children were given goody bags consisting of Monsters University’s soft toys and t-shirts, plus Petrosains’ ticket vouchers and items. The soft toys were used in the Monsters University Count the Monsters Contest, in conjunction with Disney’s Monsters University movie, which ran from 18 May until 30 June 2013 at Petrosains. The toys were pledged for charity before the contest and the children at the Pediatric Ward were chosen as the recipient.

The 80 celebrated children in the ward were seen enjoying their gifts, trying out their new t-shirts and playing with the soft toys while Petrosains staff mingled and talked to them while handing out the goody bags.

We were also taken around the Institute and discovered the ‘school for patients’ - a mini school located within the premises of the Pediatric Institute. The school was developed by GHKL in collaboration with the Ministry of Education and Yayasan Nurul Yakin to facilitate learning for patients who are away from school for long periods of time undergoing treatment at the Institute.

Petrosains was incorporated to extend PETRONAS' commitment to the community in providing and nurturing meaningful informal science learning and scientific literacy.

Part 5/7: Olive Ridley Turtles