What two elements make up water?
Hydrogen and Oxygen
When a molecule has an opposite electrical charge on each end, it is known as what?
A polar molecule
What word describes when water is attracted to other substances?
Adhesion
When water molecules stick easily to other water molecules, this is called what?
Cohesion
Water is a universal solvent because it...
Dissolves most substances
Water beads up on the surface of a penny because of what property?
High Surface Tension
Large bodies of water do not quickly fluctuate in temperature. Why?
Water has a high heat capacity.
Why does ice float?
As water freezes, it expands and its density decreases.
Why does water move from the roots to the leaves of plants?
Capillary action pulls the water molecules like a chain
What is the only substance with a neutral pH of 7?
Water
How much of Earth's water is salt water?
97%
The scale of temperature at which water freezes at 0 and boils at 100.
Celsius Scale
A student is heating a pan of water. What happens to the molecules as the temperature of the water gets hotter?
The molecules move faster
The part of a solution that does the 'dissolving'
Solvent
Water is able to dissolve almost all substances on Earth except for
Oils and fats
The charge of oxygen in a water molecule is
Negative
