InteResTing sciEnce FaCt$

1. If you could drive your car straight up you would arrive in space in just over an hour.
hmm... to KK is like 2 hours plus man...
2. Each person sheds 40lbs of skin in his or her lifetime.
how v do it?
3. Every hour the Universe expands by a billion miles in all directions.
that sounds scary...
4. 3 billion of the world’s 6 billion population are under the age of 25.
hmm.. young ppl dominating the world huh..
5. Traffic lights with red and green gas lights were first introduced in London in 1868. Unfortunately, they exploded and killed a policeman. The first successful system was installed in Cleveland, Ohio in 1914.
Luckily our trafic lights these days r safe enough hehe...

PMR Excel I

How was it? Any thing u would like to say about it? U can talk about the questions, perhaps some tips and etc....

Blood circulation

here, it's a little complicated because we are dealing with HEART.. a very complex organ..
u must be able to label the structure of a heart.. most importantly.. Ventricle, atrium, valves, vena cava, aorta, pulmonary arthery and pulmonary vein...

Next how does this blood flow in our body?
Oxygenated blood from heart to all parts of body tru left ventricle and atrium.. via aorta... then oxygen is absorbed by cells and carbon dioxide is released. now, deoxygenated blood is carried into lung via pulmonary vein n out tru vena cava to lungs.... in lungs, carbon dioxide is release and oxygen is absorbed... alevolus plays its role here....

alveolus has 3 main characteristics.. what r they?

blood group.. blood donation

lastly, transpiration... guard cell, stomata...

Respiration...

what u should know here?

what happens when v inhale?
diaphragm? rib cage? intercostal muscle? torasic cavity?

exhale will be a total opposite of it...

smoking a cigarette... harmful? what's the content? what type of illnesses caused?

matter

Definition of matter: has mass & occupies space

solid, liquid & gas...

density?

the process of matter conversion...
example, Solid to liquid is melting... it is a process where heat is absorbed...

any prob?

How is our science class?

Boys & Girls....
Any problem so far? Whenever u feel like talking.. just drop in a few words here okay!!!
Cheers!