An increase in the volume of a substance when the temperature increases is called ___________________________________.

当温度升高时，物质体积的增加称为___________________________________。

Warm air rises and the cool air sinks demonstrates this type of heat transfer. 

暖空气上升，冷空气下沉，表明这种类型的热传递。

A group of friends gather around a fire to stay warm. This is an example of:

一群朋友围着火堆取暖。这是一个示例：

Walking on the warm sand sand with your bare feet demonstrates this type of heat transfer. 

赤脚走在温暖的沙地上，展示了这种类型的热传递。

In heat transfer, heat always flows from the _______________ substance to the _______________ substance.

在传热中，热量总是从_______________物质流向_______________物质。

What is the term for the weight of air molecules pushing down on Earth?

空气分子压在地球上的重量的术语是什么？

Cool air molecules move ...

冷空气分子在低温下运动速度...

Cool air molecules take up...

冷空气分子间的间距。。。

Warm air molecules move...

热空气分子在高温上运动速度。。。

Warm air molecules take up...

热空气分子间的间距。。。

When you increase your depth under water, the water pressure on your body

当您增加水下深度时，您身体上的水压会。。。

Air spreads out in all ___________________ taking the shape of its container.

空气以容器的形状向所有___________________扩散。

A balloon or rubber gloves _______________________ as more and more air is put in it.

气球或橡胶手套会随着越来越多的空气进入其中而_______________________。