Sunday, May 9, 2010 ; Effects of Oil Spill
Effects of Oil Spill
Basically, it affects fishes, turtles and mammals (whales and dolphins) through their digestive system (damaged organs) as they take in oil in terms of oil vapour or eat oil-coated preys.
It affects their young too as mammals take in milk from their parent.
For mammals with obvious fur like otter and seal, it affects their ability to swim as their fur gets "sticky". For otter's case, it's worse as they are low in body fats and rely on air between fur to keep warm (air is a poor conductor of heat).
For birds, oil stick to their feathers and affect their flight abilities as well as their abilities to keep warm as feathers trap air between and keep birds warm.
Generally for SA1, you're not dealing with pollution full scale. You only need to know water pollution brings harm to marine lifeforms and promote bacterial or algae growth (dumping of industrial waste and erosion of fertiliser and pesticide).
Hope this helps.
posted by Allan at
10:42 PM
1 Comments:
Water is a special liquid which is actually lighter (less dense) when it is in solid state. For most objects, their solid state is heavier (denser) than liquid.
For a solid to be floating on its liquid state, it means the solid has a lower density. It also means that ice has higher volume than water, at about 8.6% more than the volume of water.
The mass of ice remains the same as water. Only volume increases.
But remember this only applies on water and very few other objects. Most objects become heavier (denser) when they become solid. In those cases, their volume decreases.
As for metallic containers called thermo flask. Thermo flask keeps water or food warm as it has a thin lining of air in between two pieces of steel. Some even has vacuum (space without air) in between. Air is a bad conductor of heat, so thermo flask can keep things both warm and cold in it.
So this is what Mr Wan wrote about the volumes of ice and water. Just FYI
Post a Comment
Subscribe to Post Comments [Atom]
<< Home