2-1~2-2

2.1 What is science?
Scientists collect data and develop theories, models, and laws about how nature works
Science is a Search for Order in Nature
have you ever seen an area in a forest where all the trees were cut down? if so. you might wonder about the effects of cutting down all those trees. You might wonder how it affected the animals and people Living in that area and how it affected the land itself.
2.1什麼是科學？
科學家收集數據並且開發理論、模型和法律關於怎樣自然運作
科學是一自然基本的本質
您看了一個區域在森林裡，所有樹被砍伐光？ 如果如此。 您也許對砍樹感到所帶來的副作用。 您也許想知道怎麼它影響了居住在那個區域的動物和人民，并且他怎麼影響了土地。



2.2 What is matter?
Matter consists of elements and compounds. which are n turn made up of atoms, ions, molecules.
Matter Consists of Elements and Compounds
To begin our study of environmental science, we start at the most basic level, looking at the stuff that makes up Life and its environment—matter. Matter is any thing that has mass and takes up space. it is found In two chemical forms. One Is elements: the distinctive building blocks of matter that make up every material substance. For example, gold is an element that cannot be broken down Into any other substance. Some matter consists of one element, but most matter consists of compounds combinations of two or more different elements held together In fixed proportions. For example. water is a compound made of the elements hydrogen and oxygen, which have chemically combined
2.2什麼是問題？
問題包括元素和化合物。哪些是由原子，離子，分子製成。
問題包括元素和化合物
要開始我們的環境科學的研究，我們以最基本的水平開始，看組成生活和它的環境的材料。 問題是有大量并且佔去空間的所有事。 它以化學形式被找到。元素： 組成每種物質的基本元素。 例如，金子是不可能為其他物質被劃分的元素。 某一問題包括一個元素，但多數問題包括在固定的比例相連的兩個或多個不同的元素的化合物組合。 例如。 水的化合物被做元素氫和氧氣，



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