Celebrating 1000 blog hits! B)

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Birthday Shoutout!!!

Have you seen today's Google doodle? It is made to a German physicist, Heinrich Rudolf Hertz who was born on February 22, 1857. So HAPPY 155TH BIRTHDAY, HERTZ!

For those who have never heard of Hertz before, here's a biography on him taken from http://www.ideafinder.com/history/inventors/hertz.htm

"Heinrich Rudolf Hertz, German physicist, born in Hamburg, and educated at the University of Berlin.  From 1885 to 1889 he was a professor of physics at the technical school in Karlsruhe and after 1889 a professor of physics at the University in Bonn.  Hertz clarified and expanded the electromagnetic theory of light that had been put forth by the British physicist James Clerk Maxwell in 1884.  Hertz proved that electricity can be transmitted in electromagnetic waves, which travel at the speed of light and which possess many other properties of light.  His experiments with these electromagnetic waves led to the development of the wireless telegraph and the radio. 

His name also became the term used for radio and electrical frequencies: hertz (Hz), as in kilohertz (kHz) or megahertz (MHz). The hertz designation has been an official part of the international metric system since 1933. Before Hertz gained professorships in Karlsruhe and Bonn, he had studied under the famous scientist Hermann von Helmholtz in Bonn, and it was Helmholtz who encouraged Hertz to attempt to win the science prize that led to some of Hertz's most important discoveries. From 1885 to 1889 Hertz became the first person to broadcast and receive radio waves, and to establish the fact that light was a form of electromagnetic radiation. (The Italian Marconi didn't begin his own wireless experiments until 1894, based on the earlier work of Hertz, Maxwell, and others.) Hertz probably would have gone on to make many more scientific contributions, but he died quite young, less than a month before his 37th birthday." 

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Photo of the Day!

Hi there! I decided to post something different today. A photo to share with you in regards to the previous post.

I asked my students to revise their notes on "Food and Its Importance" this morning as they will be having their assessment this coming Thursday. As I go around the class, these drawings made by one of the boys caught my attention. LOL! I find it amusing but somehow, I like it cause I do find it helpful for him to remember. I must say this is creatively smart of him to do this during my lesson. I must give him credit for that :)  BUT PLEASE DON'T TAKE THIS THE WRONG WAY STUDENTS! I don't want you to scribble something irrelevant to the topic I teach you at class! As I've suggested you during class, I want you start learning to take useful notes during my lesson in addition to the handouts I gave you cause it'll help you learn better.

So anyways, here's the photo that I took from this morning (with his permission)...

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"Yummy , yummy, yummy, I got love in my tummy~"

*stomach growl* Are you hungry? Wanna go grab something to eat now? Wait...what's your diet like? Are you eating the right foods? Today’s lesson is on “Food and Its Importance” as requested by one of my student. I hope he’ll be reading this post :) Alright, let’s just get right to it.

So the amount and type of food that we eat on a daily basis is very important to both health and performance. Food provides us the energy we need to do work, for growth, to build and repair damaged tissues, to keep us warm and helps our bodies to stay healthy. Not getting enough nutrients can lead to a variety of illnesses which shall be discussed later on.

The process of taking food into the body and using it for the living parts of the body is known as nutrition. There are 7 classes of food i.e. 

1) Carbohydrates     2) Proteins     3) Fats     4)Fibre (Roughage)    

5)Vitamins   6)Minerals    7)Water

1

 All of the above food groups with the exception of water are nutrients.

1)  Carbohydrates

Carbohydrates are the body’s main source of energy. We need energy for growth, movement and to keep us warm.

Carbohydrates can be classified into two types i.e. (i) Sugar (simple carbohydrate) and (ii) Starch (complex carbohydrate).

Simple carbohydrates or simple sugars can be found in foods such as fruits, chocolates, cakes, fizzy drinks and milks. They can provide a lot of energy for immediate use, but does not contain other useful nutrients like in a lollipop.

Complex carbohydrates or starches include rice, bread, potatoes, biscuits, pasta and cereals are good sources of energy. The body can easily store energy from carbohydrates for rapid use by the muscles. Starchy foods often also contain lots of useful vitamins, minerals and fibre.

However, eating too much carbohydrate can cause the excess glucose turns into fatty acids and be stored as body fat.

2)   Proteins

Proteins are needed for growth and the repair of body tissues. They are also needed for the formation of enzymes, hormones, haemoglobin and antibodies.

Examples of foods rich in proteins are egg white, meat, fish, nuts and beans.

Lack of proteins in your diet can cause kwashiorkor. The physical examination may show an enlarged liver and abdomen. To prevent kwashiorkor, make sure your  diet has enough carbohydrates, fat and protein.

3)   Fats

Fats are also used for energy, but only when stores of carbohydrate run low. Fat contains more than twice as much energy as carbohydrates. 

Fats are usually solids (e.g. butter, margarine and cheese). When the fat is liquid at room temperature, it is called oil. (e.g. cooking oil) 

Eating too much fat may lead to obesity, which is unhealthy.

4)   Fibre (roughage)

Fibre is also known as roughage which is made up of cellulose from plant cell walls. Fibre cannot be digested in our body. It holds a lot of water so that our faeces remains soft and can pass from our body easily. 

Fibre helps to prevent constipation which is a difficulty in passing out faeces from our body as a result of lack in fibre which causes the faeces to become hard and dry.

Examples of dietary fibre are whole wheat and grain products, fruits and vegetables.

5)   Vitamins

Vitamins are organic compounds needed in small amounts by our body for health and growth. A deficiency (lack) of vitamins will lead to certain diseases.

6)   Minerals

Minerals are inorganic substances needed in small amounts by our body in order to stay healthy.

7)   Water

Water makes up 70% of our body. It is the main components of our blood and body fluids. It is vitally important that you drink enough water.

Water carries substances around the body and helps to remove wastes. It is the medium for chemical reactions within the body.

Fluids include fresh water and all other liquids like fruit juice, soft drinks, coffee, tea, milk and soup. 

Milk is a mixture of nutrients with water. A mother’s milk is the most suitable food for the new born babies. Mother’s milk contains all the necessary nutrients to feed the baby properly and it is rich in antibodies, which protect the baby against diseases.

 Balanced diet

 

Everyone should try to eat a healthy, balanced diet. A balanced diet must contain all the 7 classes of foods (carbohydrate, protein, fat, fibre, vitamins, minerals and water) in the correct proportions. Each nutrient is needed for the proper functioning of the human body. The effects of not having a balanced diet can prove to be harmful to the body.

 

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