8 Physical Science Matter and How It Changes

CHANGING MATTER Have you ever wondered how water turns into ice? When you fill up a tray with water and put it into the freezer... ...the water changes from a liquid into a solid.

你有没有想过水是如何变成冰的？ 当你把托盘装满水放进冰箱时…… ．．．水从液体变成固体。

This is just one of many ways that matter can change. But what, you may ask, is matter? Oh... Where are my manners? I'm MATTER. Everything in the world is made of me!

这只是物质可以改变的众多方式之一。 但是，你可能会问，物质是什么？ 哦……我的礼貌哪儿去了？ 我事。世界上的一切都是我造的！

WHAT IS MATTER MADE OF? Before we can look at ways that matter can change, we need to know what matter is made of. LIGHTS! Thank you. First slide please... If you look inside, you'll see that I am made of tiny particles called atoms.

物质是由什么构成的？在我们研究物质变化的方式之前，我们需要知道物质是由什么组成的。 灯!谢谢你！请放第一张幻灯片…… 如果你看里面，你会发现我是由叫做原子的微小粒子组成的。

Atoms are the basic units of matter. When atoms bond together, they form molecules. LIGHTS, PLEASE! Let's take a closer look at ice. It's made of molecules of two hydrogen atoms and one oxygen atom, just like liquid water. So how come it's frozen solid and not a liquid? Simple! Matter can change states, or forms.

原子是物质的基本单位。 当原子结合在一起时，它们形成分子。 灯,谢谢!让我们仔细看看冰。 它由两个氢原子和一个氧原子组成，就像液态水一样。 那为什么它是固态而不是液态呢？ 简单!物质可以改变状态或形态。

STATES OF MATTER There are three basic states of matter: solids, liquids, and gases. The molecules in a SOLID vibrate. They are arranged in a repeating pattern, like soldiers marching together. The molecules in a LIQUID move more freely, like people walking in a large group.

物质有三种基本状态：固体、液体和气体。 固体中的分子会振动。 它们以重复的模式排列，就像士兵一起行军一样。 液体中的分子移动更加自由，就像一大群人一起行走一样。