Google Doodle 02-07-2013: Mary Leakey

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Mary Leakey was a British archaeologist and anthropologist, who discovered the first fossilized Proconsul skull, an extinct ape now believed to be ancestral to humans, and also discovered the robust Zinjanthropus skull at Olduvai Gorge.

Source: Wiki

2011 International Year for Chemistry

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And I just learned about it too. Thanks to our office newsletter which I seldom read.

I have this blog to share my love for Science particularly on Chemistry. And to share that it is also simple, interesting and fun. I can’t get enough of the vast knowledge Science has to offer. With that I am always on the look-out for new things to learn. We must instill that passion to our kids and youngsters.

I’ll share some items on the American Chemistry Society (ACS) booklet called “Celebrating Chemistry”.

Science: Tree of Knowledge

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When we say branches, the first thing in our mind is a tree. From one trunk sprouts branches, twigs then leaves.

So when we say Science it is one big tree of knowledge with the different fields as its branches.

Here I listed the major branches or divisions of Science as Pure and Applied Sciences, further comes other smaller branches or twigs like Physical Science, Life Science, etc. Down comes the leaves with Physics, Chemistry, Botany and the like.


Pure Sciences

1. Physical Science
-Physics
-Chemistry
-Astronomy

2. Life Science
-Botany
-Zoology
-Genetics

3. Earth Science
-Geology
-Seismology
-Oceanography

Applied Sciences

1. Mathematical Science
-Algebra
-Geometry
-Calculus

2. Social Sciences
-Anthropology
-Political Science
-Economics

3. Engineering
-Chemical Engineering
-Mechanical Engineering
-Electrical Engineering



I'll discuss those different Sciences (or maybe discussed some already) along the way.

Hazard Identification

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Read the label, make it a habit!

Whether you’re buying foods, medicine, insecticide, chemicals – it’s always better to be safe than sorry.

For foods and medicine be wary of the expiration dates, and if you’re health conscious also the sugars, carbs, salt in it, etc







For chemicals, look for the hazard label, code, logo or picture. It will give you the proper warning on how to use, handle, dispose, etc.

How can we apply these knowledge?

Pls read the email I received a few days ago...

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This is a Home Safety incident that happened on 13th May 2011 in Pune, India ..
Incident:
A housewife died due to burns sustained in the kitchen. Her husband too hospitalized for injury/burn while trying to rescue her.
What happened:
The gas stove was on, cooking under process. The housewife observed some cockroaches near the sink and grabbed a can of insect repellent and sprayed it near the gas stove, which was on/burning.
As a result, an explosion happened and in no time the housewife was covered in flames, sustained 65% burns. Her husband rushed in, tried to extinguish the flames and his clothes too caught fire. The husband is still being hospitalized in the burns ward and still unaware that his wife has succumbed, dead on arrival.
Let us Learn:
Insect repellent and other pressurized cans contain Flammable Material.
Did the poor lady realise the hazard involved? Apparently not!

Density

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It’s not a misspell, it is indeed Density and not Destiny because you are on my Science blog eh.

Okay, Density is defined as the mass per unit volume.

There was a running question (or joke - but not really funny), which is heavier 1 Kg of cotton or 1Kg of nail?

The obvious answer is- it both has the same weight.

But the correct question should be which is more dense?

And the correct answer is the nail.

Why?

Because although they have the same weight or mass (which is 1 Kg), the volume occupied by the cotton is more than the volume of the nail.

So let’s assume, the volume of cotton is 2 cm3 and nail is 0.5 cm3, the density of cotton and nail can be computed using the formula:

Density = mass/ volume

Density of cotton = 1 Kg/ 2 cm3 = 0.5 Kg/cm3

Density of nail = 1 Kg/ 0.5 cm3 = 2.0 Kg/cm3

Therefore, nail is more dense than cotton.

But I’ll give you a shorter way to determine which is more or which is less without the computation perse.

If you will submerge it with water, which one will sink and which one will float?

Of course the nail will sink and the cotton will float.

There goes the same answer, the nail is more dense while the cotton is less dense.

Why?

Because density of water is always 1 and used as THE standard.

So things (liquid or solid) with density more than 1 will sink,

While things (liquid or solid) with density less than 1 will float.

I always encourage people even myself to ask, because that’s how you learn things.

Gets?

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And while we’re on the topic, some use the word ‘dense’ to describe persons who cannot grasp things (like if your crush doesn’t understand your pa-cute ways)…

So when people call you dense don’t be happy about it because it means you’re less than 1 (the standard).

Gets?

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It’s been a whole year since my last post…

my apologies to my blog and my readers (if any)…

pH Care

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Since I’m still high on my new job, I’ll let you peek on one of the test and machine I am using.

Tada! The one on the center is a pH Meter, and that goes to show it measures the pH of a solution.

What do you know about pH?

pH is the measure of acidity or alkalinity of a solution. Or the measure of hydrogen ions (H+). The pH scale is from 0 to 14 with 0 as most acidic and 14 as most basic. Of course 7 is the median with pure water as the best example.

pH scale from staff.jccc.net

I’m sure you don’t care about those things, but I am to cite a more common example. We are aware of the many genitalia products in the market all claiming to be the best because it is either pH 4 or 5 and so on. They are correct, pH balance is a fundamental component of vaginal health (to read more visit sweetspotlab.com). We have to maintain the natural pH of 4 to 5 (generally acidic), and using soap with pH of 8 to 10 (generally basic) would disrupt the balance.

But hey nowadays, lower pH soaps are available so just check out the labels.

Science is great huh? Everything has an explanation. That's why I love it!

Life and Science

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I find science very fascinating!

Imagine the whole universe conniving and constantly on the go 24/7.

The planets revolving, and yet never bump with each other. (Astronomy)

The tiny egg and sperm cells joining together, how it develops into a baby and all these actions happened in the womb of a mother! (Biology)

The formation of water from hydrogen and oxygen atoms. (Chemistry)

But above all, I am more enthralled with the one who created the minute details of this and that, God, He is definitely omnipotent! All the glory should be yours, now and forever!