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Water circulating through pipes is often used to cool engines that produce large amounts of heat. Why is circulating water an effective method of cooling?
Water is a polar molecule, and its cohesiveness causes high surface tension.
polar ice caps
The high specific heat of water allows it to absorb a lot of heat before it increases in temperature
100°C
Water molecules have a positive charge on one end and a negative charge on the other.
Cohesion causes the water molecules to be attracted to one another.
97%
A substance with a lower density than water.
Approximately 70% of Earth's surface is covered with water. What percentage of this water is salt water contained in oceans?
Water is a polar molecule, and its cohesiveness causes high surface tension.
polar ice caps
The high specific heat of water allows it to absorb a lot of heat before it increases in temperature
100°C
Water molecules have a positive charge on one end and a negative charge on the other.
Cohesion causes the water molecules to be attracted to one another.
97%
A substance with a lower density than water.
If you pour water on to a sheet of wax paper, the water forms drops that are flat on the bottom and round on top. Why does the water arrange itself in this shape?
Water is a polar molecule, and its cohesiveness causes high surface tension.
polar ice caps
The high specific heat of water allows it to absorb a lot of heat before it increases in temperature
100°C
Water molecules have a positive charge on one end and a negative charge on the other.
Cohesion causes the water molecules to be attracted to one another.
97%
A substance with a lower density than water.
What do scientists mean when they say that water is a polar molecule?
Water is a polar molecule, and its cohesiveness causes high surface tension.
polar ice caps
The high specific heat of water allows it to absorb a lot of heat before it increases in temperature
100°C
Water molecules have a positive charge on one end and a negative charge on the other.
Cohesion causes the water molecules to be attracted to one another.
97%
A substance with a lower density than water.
Where is the majority of Earth’s freshwater located?
Water is a polar molecule, and its cohesiveness causes high surface tension.
polar ice caps
The high specific heat of water allows it to absorb a lot of heat before it increases in temperature
100°C
Water molecules have a positive charge on one end and a negative charge on the other.
Cohesion causes the water molecules to be attracted to one another.
97%
A substance with a lower density than water.
Which type of substance can float in water?
Water is a polar molecule, and its cohesiveness causes high surface tension.
polar ice caps
The high specific heat of water allows it to absorb a lot of heat before it increases in temperature
100°C
Water molecules have a positive charge on one end and a negative charge on the other.
Cohesion causes the water molecules to be attracted to one another.
97%
A substance with a lower density than water.
Which statement best explains the reason some insects can walk across the surface of a lake?
Water is a polar molecule, and its cohesiveness causes high surface tension.
polar ice caps
The high specific heat of water allows it to absorb a lot of heat before it increases in temperature
100°C
Water molecules have a positive charge on one end and a negative charge on the other.
Cohesion causes the water molecules to be attracted to one another.
97%
A substance with a lower density than water.
A beaker with 100 mL of water is placed on a hot plate and heated. The water boils at 100°C. At what temperature would 90 mL of water boil?
Water is a polar molecule, and its cohesiveness causes high surface tension.
polar ice caps
The high specific heat of water allows it to absorb a lot of heat before it increases in temperature
100°C
Water molecules have a positive charge on one end and a negative charge on the other.
Cohesion causes the water molecules to be attracted to one another.
97%
A substance with a lower density than water.
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