MdmRiza came back to go through with us about transport in humans before our exams.So this is my 3.2.1 reflection of the lesson.
3 Things I Learnt
I learnt that our blood is made up of mainly four substances:red blood cells,white blood cells,platelets and plasma.The red blood cells carry oxygen around the body while the white blood cells kills germs and bacteria in our blood cells.The platelets in our body clot up cuts in our skin so that we do not lose excessive blood and the plasma carries waste materials and carbon dioxide.
2 Questions
I'm wondering how do the white blood cells kills germs.Do they release a substance to kill them?Another question is that how is our heart able to pump blood without stopping?Our other muscles will get tired after some time of exercising and such but how does our heart continue?
1 Useful Application
One useful application is that now I know what is in my blood and what are the uses and functions of my circulatory system and this helps understand my body more
Tuesday, May 17, 2011
14 April 2010
On that day,my class learnt about diffusion and osmosis.so here is my 3.2.1 reflection on it :)
3 Things I Learnt
I learnt that diffusion takes place in all three states of matter while osmosis only occurs in liquids and when an partially permeable membrane is present.I also learnt that diffusion is a part of osmosis,since both processes have a higher concentration of a substance moving to a lower concentration.Another thing I learnt is that osmosis occurs in plants such as when water is absorbed by the root cells.
2 Questions
One question is that why do substances diffuse?Another question is that is water able to go into our body through osmosis of the skin cells?
1 Useful Application
One useful application is air sprays.The spray will diffuse from the can into the surrounding air as the concentration of the spray is lower in the surroundings.This is why we can smell it even if we're away from the can.
3 Things I Learnt
I learnt that diffusion takes place in all three states of matter while osmosis only occurs in liquids and when an partially permeable membrane is present.I also learnt that diffusion is a part of osmosis,since both processes have a higher concentration of a substance moving to a lower concentration.Another thing I learnt is that osmosis occurs in plants such as when water is absorbed by the root cells.
2 Questions
One question is that why do substances diffuse?Another question is that is water able to go into our body through osmosis of the skin cells?
1 Useful Application
One useful application is air sprays.The spray will diffuse from the can into the surrounding air as the concentration of the spray is lower in the surroundings.This is why we can smell it even if we're away from the can.
January 18 2010
3 Things I Learnt
I learnt that particles of a matter have different amounts of forces of attraction in different states.I also know the particles of solids have the strongest attraction of the three states and particles of gases have the weakest attraction.I also know that the particles of gas and liquid do not have fixed positions
2 Questions
I wonder how ae the particles of a substance thats sublimes skip the liquid stage when changing from solid to gas.Another question is whether the subtances that sublimes can change into solid from a gas without changing into a liquid.
1 Useful Application
I can apply ths into my daily life as now I know why mothballs seems to 'dissapear' after a period of time.
I learnt that particles of a matter have different amounts of forces of attraction in different states.I also know the particles of solids have the strongest attraction of the three states and particles of gases have the weakest attraction.I also know that the particles of gas and liquid do not have fixed positions
2 Questions
I wonder how ae the particles of a substance thats sublimes skip the liquid stage when changing from solid to gas.Another question is whether the subtances that sublimes can change into solid from a gas without changing into a liquid.
1 Useful Application
I can apply ths into my daily life as now I know why mothballs seems to 'dissapear' after a period of time.
Wednesday, October 13, 2010
15/09/10 Life Science Infusion - Cells Biology
On the fifteenth of September,we were tasked to do a résumé.Before that,we were introduced to the topic of Cells.We learnt about the basic cell organelles and their functions,for example the nucleus.Its the control tower of the everything that happens in the cell,like our brain.
After the introduction,we were briefed about our task.MdmRiza gave us each a different cell organelle to explore and write a résumé on ourselves to apply for a job.It seems like a tough job at first,but it was real simple in the end.
That day we learnt about cells in a more detailed view thus we are able to understand more of its functions.
After the introduction,we were briefed about our task.MdmRiza gave us each a different cell organelle to explore and write a résumé on ourselves to apply for a job.It seems like a tough job at first,but it was real simple in the end.
That day we learnt about cells in a more detailed view thus we are able to understand more of its functions.
Thursday, July 22, 2010
22/07/10 =D
Hmm...today Mdm Riza showed us a video of what happen when certain metals were dropped into water.you might think that metals just sink and rust in water...but thats only for iron and metals like it...there is a wide variety of metals so why not thinking of other metals?
so yea..the video started off with a metal moving around in a large bowl of water and giving off nitrogen in the form of a white gas.that was the reaction of the metal.then another metal was dropped.that metal has a higher atomic number.so since it has more atoms in it,the metal give off nitrogen at a faster rate.
then the third metal was dropped.the atomic number of the metal increases as the number of metal dropped increases.so this time the release of nitrogen was so fast that the nitrogen caught fire.then the following metals exploded upon contact with the water...the last few were so large that the camera crew had to put protective glass in front of them...so yea..
so yea..the video started off with a metal moving around in a large bowl of water and giving off nitrogen in the form of a white gas.that was the reaction of the metal.then another metal was dropped.that metal has a higher atomic number.so since it has more atoms in it,the metal give off nitrogen at a faster rate.
then the third metal was dropped.the atomic number of the metal increases as the number of metal dropped increases.so this time the release of nitrogen was so fast that the nitrogen caught fire.then the following metals exploded upon contact with the water...the last few were so large that the camera crew had to put protective glass in front of them...so yea..
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