A1.1 Water Flashcards
Explain a polar covalent bond is formed
A difference in the electronegativity between 2 atoms
Explain the polarity of water
- oxygen is slightly negative
- hydrogen is slightly positive
What is cohesion
A property in which water molecules are attracted to each other by hydrogen bonding, allowing the molecules to move together
What is specific heat capacity
Amount of energy needed to heat 1kg of liquid by 1 degree
What is buoyancy?
A force that counteracts the force of gravity
What is viscosity?
Resistance to flow and is related to how much energy is needed to change the shape of a liquid
What is thermal conductivity?
Ability of a substance to transfer heat when there is a temperature difference
How is water retained on Earth?
- moderate temperature
- gravity
How did most of the water end up on Earth?
Asteroids
What is the ‘Goldilocks zone’ ?
The orbital distance from a star that will result in liquid water
