Property of water

What is the chemical symbol of water?

• H2O

• CO2

• O2

• N2

Tags

NGSS.MS-PS1-1

Blood functions as a transport mechanism to take nutrients and oxygen to all cells in the body. What property of water allows for this to occur?

• Expansion Upon Freezing

• Universal Solvent

• Cohesive Behavior

• Ability to Moderate Temperature

Describe the movement of the water molecules at cold temperatures.

• They join together and move slowly

• They move very fast and erratically (疯狂的)

Tags

NGSS.MS-PS1-4

Describe the movement of the water molecules at hot temperatures.

• They join together and move slowly.

• They move very fast and erratically (疯狂的).

Tags

NGSS.MS-PS1-4

Water is a universal solvent because it...

• It can be found anywhere

• It freezes when it gets cold

• floats when frozen 冻结时会漂浮

• Dissolves most substances

Which of the following is LEAST likely to dissolve in water?

以下哪个最不可能溶于水？

• fats and oils

• sugar molecules

• salt

• all of the substances will dissolve easily in water

Water has high specific heat. Meaning, it takes _____ time to warm up a large amount of water. 水的比热容高，也就是说，加热水需要的时间长/短

• long

• short

Tags

NGSS.MS-PS3-4

What two elements make up water? 哪两个元素组成了水？

• Helium and oxygen

• Hydrogen and oxygen

• helium and carbon

• oxygen and carbon

Tags

NGSS.MS-PS1-1

Large bodies of water, such as lakes and oceans, do not quickly fluctuate in temperature （湖水和海洋温度波动不大）. What is the reason for this phenomenon?

• Water is an acid 水是一种酸.

• Water is a versatile solvent 水易挥发.

• Water is able to moderate temperature.

What property of water causes these tablets to dissolve?

• universal solvent

• expansion Upon Freezing

• cohesive Behavior

• ability to moderate temperature