Water Flashcards
Cohesive Forces
Forces within a substance by which particles of the same molecule stick together
How do Cohesive& Adhesive; Forces effect Water?
The Cohesive and Adhesive Properties of water allow for the efficient transport of nutrients and waste within plants and animals
What Cause Cohesive Forces in Water?
Cohesive forces are strong in water due to hydrogen bonds
Adhesive Forces
The force through which one substance sticks to another
What Causes Adhesive Forces in Water?
Adhesive Forces are present in water because it is a Polar Molecule, allowing it to cling to other polar surfaces. E.g water on a leaf.
What is surface tension
The unbalance of forces acting on surface molecules. The stronger intermolecular bonding of H Bonds in the water means it has high surface tension than most liquids
What causes Surface Tension in water?
The water molecules at the surface have strong cohesive forces, they are more attracted to each other than the air above.
What does Surface Tension allow for?
Allows for water striding animals to walk on water and escape preditors
How is water a Universal Solvent
Many ionic and polar substance can dissolve in water due to its polarity and hydrogen bonding. It cannot dissolve non-polar substances
What does Waters property of being a universal solvent allow for?
The forming of electrolyte solutions in our bodies.
What is mensicus
The curved surface of a liquid.
When measuring water measure from the _______ of the menicus
When measuring water measure from the Bottom of the meniscus
If the ________ forces are stronger the meniscus will be convex
If the COHESIVE forces are stronger the meniscus will be convex
If the ________ forces are stronger the meniscus will be concave
If the ADHESIVE forces are stronger the meniscus will be concave
What causes waters high capacity for heat?
The hydrogen bonds that link water molecules and let it absorb a large amount of head without changing state.
Applications of Waters High Heat Capacity
Helps stabilize large bodies of water
Help organisms maintain homeostasis. The temperature of water rises and falls slowly allowing organisms to maintain their normal internal temperatures.
When is water most dense
4 degress
Why is ice less dense than water?
When water freezes it expands, making it less dense. this is due to the ring structure.
How does ice being less dense that water effect the world
Bodies of water freeze from the top down.
The ice on the surface acts as an insulator to protect the water below. This protects aquatic organisms so that they can survive the winter
