7307723
Description
Mind Map by Emma Lloyd, updated more than 1 year ago
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Created by Emma Lloyd
almost 8 years ago
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Water
- Polarity
- Covalent bonds occur when atoms
share electrons
- Electrons are not always shared equally - sometimes,
there can be more negative charges closer to one atom in
the bond than the other. This makes a molecule POLAR
- The atom with the greater
amount of negative ions is slightly
negative compared to the other
atom in the bond, which is slightly
positive
- The atom with the greater
amount of negative ions is slightly
negative compared to the other
atom in the bond, which is slightly
positive
- Electrons are negatively charged
- Electrons are not always shared equally - sometimes,
there can be more negative charges closer to one atom in
the bond than the other. This makes a molecule POLAR
- Covalent bonds occur when atoms
share electrons
- Structure of Water
- Water Molecules can interact with
each other due to hydrogen bonding
- Hydrogen bonds are relatively weak. They are constantly breaking and
reforming as water flows and moves around. However, because they occur in
such large numbers, they give water its unique properties
- Hydrogen bonds are relatively weak. They are constantly breaking and
reforming as water flows and moves around. However, because they occur in
such large numbers, they give water its unique properties
- Properties of Water
- Water has an unusually high boiling point. The
hydrogen bonds mean that it takes a large
amount of energy to raise the temperature of it
by 1 degree.
- When water freezes it is known as ice, a solid. With most substances, their solid
state is more dense than their liquid state. However, with water, the solid state
is less dense than liquid water. This is due to cool temperatures freezing the
hydrogen bonds further apart than in the average liquid makeup. This
produces a large, open, rigid structure. So, ice floats.
- Ice provides a habitat for a variety of living species
- Ice provides a habitat for a variety of living species
- Water is cohesive (sticks to itself) as all
of the molecules are bonding together.
This is how we can drunk through a
straw or how water moves up a plant
- It is also adhesive
(sticks to other
materials), allowing us
to wash our hands
without water
running instantly off
- It is also adhesive
(sticks to other
materials), allowing us
to wash our hands
without water
running instantly off
- Water for Life
- Water is a solvent, so lots of molecules can dissolve into it being as it is
polar, like other solutes. Hence, it can be used as a transport system in
and out of cells
- Adhesion and cohesion give water CAPILLARY ACTION which means water can flow
up a narrow tube against gravity.
- Water acts as a coolant as
it takes a lot of energy to
raise its temperature
- Water provides a stable environment. Its surface tension provides an environment for specialised insects such as pond
skaters whilst its ice provides an arctic habitat for mammals. The ice also insulates the water beneath, making the water
below suitable for fish life and some mammals. It is also a suitable habitat as the waters temperature does not fluctuate
easily. Water also lets light through for aquatic plants.
- Water acts as a coolant as
it takes a lot of energy to
raise its temperature
- Adhesion and cohesion give water CAPILLARY ACTION which means water can flow
up a narrow tube against gravity.
- Water is a solvent, so lots of molecules can dissolve into it being as it is
polar, like other solutes. Hence, it can be used as a transport system in
and out of cells
- Water has an unusually high boiling point. The
hydrogen bonds mean that it takes a large
amount of energy to raise the temperature of it
by 1 degree.
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