The boiling point of water (at sea level) is...水的沸点（在海平面上）是......
100 F
100 C
Every liquid has its own boiling/melting point.每种液体都有自己的沸点/熔点。
True.
False.
How do you water is very hot just by looking at it?你怎么看水就很热？
The water level drops. 水位下降。
Bubbles and steam. 气泡和蒸汽。
What do we measure temperature with?我们用什么来测量温度？
Thermometer. 温度计。
Pedometer. 计步器。
The temperature at which a liquid boils is called its...液体沸腾的温度称为...
Freezing point.冰点。
Boiling point.沸点。
Melting point.熔点。
When things reach boiling point, they change from a liquid to a...当物质达到沸点时，它们会从液体变成...
gas.气。
solid.固体。
The scientific name for steam is...蒸汽的学名是...
spray.喷。
water vapour.水蒸气。
Each different liquid has its own freezing point.每种不同的液体都有自己的冰点。
False
True
Water freezes at which temperature? 水在什么温度下会结冰？
0 F
0 C
When water freezes it increases in size. 当水结冰时，它的大小会增加。
True
False
When a solid becomes a liquid it is called...当固体变成液体时，它被称为......
The freezing point.冰点。
The boiling point.沸点。
The melting point .熔点。
Name 4 things that can melt.说出 4 种可以融化的东西。
ice. wax. plastic. chocolate. metal. butter. ice cream...
Which substance is liquid at 25 degrees C?哪种物质在 25 摄氏度时是液体？
Diesel 柴油
Candle wax 蜡烛蜡
Which substance is solid at 25 degrees C? 哪种物质在 25 摄氏度时是固体？
Chocolate
Water
Which substance would have to be cooled to -220 degrees to make it a liquid?哪种物质必须冷却到 -220 度才能变成液体？
Oxygen.氧。
Iron 铁
On the highest mountain in the world, water boils at 71 degrees C.在世界上最高的山上，水的沸点为71摄氏度。
False
True
