Properties of Water
What is capillary action?
"Capillary action occurs when a liquid rises in a thin tube because the adhesive forces between the tube and the liquid are stronger than the cohesive forces between liquid's molecules.
Refer to the picture of water sticking to a lilypad; this is occurring because of what?
Adhesion
What is cohesion?
Attraction between molecules of the same substance (water on penny); water sticks to water; this produces surface tension
How does capillary action affect plants?
Capillary action is one of the forces that draws water out of the roots of a plant and up into its stems and leaves.
What causes the meniscus in measuring? a) Cohesion b) polarity c) I don't know d) None of the above
Cohesion
How is cohesion different from adhesion?
Cohesion attracts its own molecules while adhesion attracts it to other things.
When water molecules solidify it ______________.
Crystallizes
Which of the following is not an example of capillary action? a) a paper towel soaking up spilled milk b)A tree moving water up to its highest leaves c)The convex surface of mercury in a narrow glass tube d) Water climbing higher in a straw than in the glass in which it sits
D
Water properties
High heat capacity; polar; molecules of water cling together; a great solvent; liquid at room temp; frozen water is less dense then liquid water.
What two elements make up water?
Hydrogen and Oxygen (H2O)
Why does water take a long time to freeze and boil?
Hydrogen bonds must form to allow changes
How does ice insulate bodies of water?
It allows the water underneath it not to freeze and turn solid.
What are the two things water doesn't like?
Oils and Fats
Which of the 5 properties of water do you think is the most important? answer in a well developed paragraph
Opinion based
Why doesn't water in lakes and ponds of temperate climates freeze solid during the winter and kill nearly all the living things it contains?
Water resist temperature changes
What is polarity?
a molecule in which the charges are unevenly distributed
Is water denser as a liquid or a solid?
liquid
How does ice float?
solid molecules are further apart which makes ice less dense than water causing ice to be able to float
Water molecules _____________ and break apart
surround
What is hydrogen bonding?
the intermolecular force in which a hydrogen atom that is bonded to a highly electronegative atom is attracted to an unshared pair of electrons of an electronegative atom in a nearby molecule
Because water is a polar molecule
water is able to form multiple hydrogen bonds, which its known as a Universal property.