2-3~2-5

2.3 how can matter change?
When matter undergoes a physical or chemical cat change, no atoms are created or destroyed the Law of conservation of matter
2-4 What is energy and how can It change its form?
When energy is converted from one form to another in a physical or chemical change, no energy is created or destroyed first law of thermodynamics
2.5 How can we use matter and energy more sustainably?
The processes of life must conform to the law of conservation of matter and the two laws of thermodynamics

2.3問題怎麼改變？
當問題進行物理或化工貓變動時，原子沒有被創造也沒有毀壞物質守恆定律
2-4什麼是能量和怎麼它改變它的形式？
當能量從一個形式被轉換到另一個在物理或化學變化時，能量沒有被創造或被毀壞的熱力學第一定律
2.5我們怎麼可以使用問題和能量更加能承受？
生活的過程必須依照物質守恆定律和二個熱力學定律