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Properties of Water-7th Grade Ohio Science Fusio ...
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Molecules of water as a solid (ice) are
close together, unable to move, and have a very organized pattern (like sitting inside the movie theater in rows, tightly packed)
Molecules of water as a liquid (water) are
fairly close together and semi-organized pattern (front lobby of the movie theater)
Molecules of water as a gas (steam) are
spread out with no organized structure (roadway in front of the movie theater)
When water freezes, it...
expands
The top of a trampoline demonstrates
high surface tension
Water freezes from the...
top down.
Pure water is...
tasteless, colorless, and odorless
Water dissolves a substance until the water becomes saturated and can't dissolve any more of the substance. How much of a substance can be dissolved before the solution is saturated?
It all depends upon the temperature of the water...the higher the temperature of the water, the more substance can be dissolved
Large bodies of water help to keep nearby climates from being too hot or too cold because they...
absorb heat in the summer and slowly release that heat in the winter
Why does water have high cohesion?
Its molecules are polar so the oppositely charged ends of the molecules are attracted to one another..."opposites attract"
Attractions between water molecules are called what?
Hydrogen bonds
The reason the water balloon did NOT pop while held over a flame is water's _________.
high specific heat capacity.
Which part of a water molecule has a positive charge?
hydrogen
Which of the following is the CORRECT list of water's properties?
adhesion, cohesion, high specific heat, universal solvent
Your body sweats to help prevent you from overheating. How does water regulate temperature?
It absorbs a lot of heat, but only increases a little in temperature
Water has a much higher specific heat than most other covalent compounds. What do you predict might happen if water had a low specific heat instead?
Organisms that are sensitive to changes in temperature would die
Water can be found in three states. What are they?
Solid, liquid, and gas
Why does water have a high specific heat index?
It requires a great amount of energy for water to become hot.
The charge of oxygen in a water molecule is
Negative
Water is able to dissolve almost all substances on Earth except for
Oils and fats
The part of a solution that does the 'dissolving'
Solvent
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 scale of temperature at which water freezes at 0 and boils at 100.
Celsius Scale
How much of Earth's water is salt water?
97%
What is the only substance with a neutral pH of 7?
Water
Why does water move from the roots to the leaves of plants?
Capillary action pulls the water molecules like a chain
Why does ice float?
As water freezes, it expands and its density decreases.
Large bodies of water do not quickly fluctuate in temperature. Why?
Water has a high heat capacity.
Water beads up on the surface of a penny because of what property?
High Surface Tension
Water is a universal solvent because it...
Dissolves most substances
When water molecules stick easily to other water molecules, this is called what?
Cohesion
What word describes when water is attracted to other substances?
Adhesion
When a molecule has an opposite electrical charge on each end, it is known as what?
A polar molecule
What two elements make up water?
Hydrogen and Oxygen
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