1-6~2-4

1-6
what are four scientific principles of sustainability?
永續性的四項科學原則是..？
ans:
1.reliance on solar energe對太陽能量的依賴
2.biodiversity 生物多樣性
3.population control 人口的控制
4.nutrient cycling 養分的循環


2-1
what is science
科學是什麼

ans:
science is an endeavor to discover how nature works and to
use that knowledge to make predictions about what is likely
to happen in nature
科學是研究且去發現大自然任何活動，利用知識定律是預測未來
自然中可能的發生
2-2
what is matter
物質是什麼
ans:
matter is anything that has mass takes up space
物質佔有空間具有質量
由原素組成，形成化合物等等

2-3
how can matter change
物質如何轉換﹝改變﹞

ans:
matter undergoes physical,chemical,and nuclear changes

物質經由物理變化化學變化轉換
我們不可能製造或消滅任何物質，物質遵守量守恆定律，
不過只有在核反應等等例外

2-4
what is energy and how can it change
能量是什麼以及它如何轉換﹝改變﹞

ans:
moving energy:運動能量，物質能量中有速度產生
例如：風.流動的水.電的產生
熱：溫度由高溫向低溫流動

stored energy:potential energy位能


energy changes are governed by two scientific laws
能量的轉換須遵守兩個科學定律

1.law of conservation of energy,[first law of thermodynamics]熱力學第一定律
when energy is converted from one to another in a physical or chemical change, no energy is created or destroyed.
能量在物理或化學變化轉換時，能量不會被創造或被毀壞

2.second law of thermodynamics熱力學第二定律
when energy is changes from one to another,we always end up with lower quality or less usable
energy than we started with.
能量轉換的過程中，些微能量會以熱消失