Can You Classify Matter as Solid,Liquid,or Gas?

河南郑州市惠济区实验小学 李 颖 编译

Solid,liquid,and gas are states of matter.Matter is anything that takes up space.Matter can come in different states,or forms.

固态、液态和气态是物质的状态。物质是占据空间的任何东西。物质可以有不同的状态或形式。

When matter is a solid,it has a definite volume and a definite shape.So,a solid has a size and shape of its own.Some solids can be easily folded,bent or broken.Such as,a piece of paper is a solid.Also,some solids are very tiny.For example,a grain of sand is a solid.

当物体是固体时，它有一定的体积和形状。所以，固体有自己的大小和形状。一些固体容易折叠、弯曲或打破。比如，一张纸是固体。此外，一些固体非常细小。比如，一粒沙子是固体。

When matter is a liquid,it has a definite volume but not a definite shape.So,a liquid has a size of its own,but it does not have a shape of its own.Think about pouring juice from a bottle into a cup.The juice still takes up the same amount of space.However,it doesn’t take the shape of the bottle,but takes the shape of the cup.Some liquids do not pour as easily as others.For example,honey and milk,but pouring honey takes more time than pouring milk.

当物体是液体时，它有一定的体积，但没有一定的形状。所以，液体有自己的大小，但没有自己的形状。想象一下，把瓶子里的果汁倒进茶杯里，果汁仍然占据相同的空间。然而，它却不是瓶子的形状，而是茶杯的形状。有些液体不像其他液体那样容易倒出，比如，蜂蜜和牛奶，但是，倒蜂蜜比倒牛奶要花更多的时间。

When matter is a gas,it does not have a definite volume or a definite shape.A gas’ volume expands,or gets bigger,until it completely fills a space.A gas’ volume can also get smaller if it is squeezed into a smaller space.Many gases are invisible.For example,air is a gas.

当物体是气体时，它没有确定的体积或形状。气体会发生体积膨胀，或体积增大，直到完全充满空间。如果气体被压缩到更小的空间中，它的体积也会变得更小。许多气体是看不见的。例如，空气是一种气体。

All the matters can be classified to be solid,liquid and gas.For example,wood is a solid,water is a liquid,and oxygen is a gas.You can find that different matters have different states.

所有物体可分为固体、液体和气体。例如，木头是固体，水是液体，氧气是气体。你会发现，不同的物质有不同的状态。

However,sometimes some solid can be changed into liquid.Such as,ice is a solid.It turns into liquid when it’s heated.Water is a liquid.It changes into gas when it’s heated.In winter,when the temperature is below 0℃,water becomes ice,which is a solid.

然而，有时一些固体可以变成液体。例如，冰是固体，它受热后会变成液体。水是一种液体，它受热后会变成气体。在冬天，当温度低于0℃时，水会变成冰，而这是一种固体。

Can you classify matter as solid,liquid,or gas? Have a try.

你会区分物质的固态、液态或气态吗？试一试吧。

1.Is rain a solid,a liquid,or a gas?

2.Is the water from a faucet a solid,a liquid,or a gas?

3.Is a tortoise shell a solid,a liquid,or a gas?

4.Is a handsaw a solid,a liquid,or a gas?

5.Is the air inside a soccer ball a solid,a liquid,or a gas?

6.Is wet glue a solid,a liquid,or a gas?

7.Is the air moving through a trumpet a solid,a liquid,or a gas?

8.Is a baseball glove a solid,a liquid,or a gas?

9.Is a piece of rope a solid,a liquid,or a gas?

10.Is a piece of glass a solid,a liquid,or a gas?

(参考答案见本期第73 页)