AQA A Level Biology Water
Describe what happens when water decreases in temperature - ANS-Water molecules much
less able to hydrolyse the hydrogen bonds as they have less kinetic strength.
Semi-crystalline shape is shaped, which holds the water molecules apart, making ice less
dense than water for this reason it floats.
This method that it insulates the water below, allowing organisms within the liquid water to
live on
Explain another impact at the plant as a result of the evaporation of water from its leaves -
ANS-1. Cools leaves
2. Evaporation uses heat from leaves
Explain the which means of the terms Hydrophilic and Hydrophobic and provide one
example for every - ANS-Hydrophillic: Will mix/dissolve in water
instance: Any named ion (calcium/sodium) any named gas
Hydrophobic: Will now not mix with/dissolve in water instance: Lipid
Explain why water may be used as a medium for chemical reactions produced via
respiratory and photosynthesis - ANS-Water is a superb solvent
Water is liquid over a wide range of temperatures
Explain why water is a superb solvent for different polar molecules (Such as ammonia and
ethanol) and ionic substances - ANS-Polar:
Cant have interaction with the charged areas and dissolve the substance
Ionic:
Water molecules cluster across the ions and separate them, dissolving the substance
Explain why water is considered so critical for life to occur (6 marks) - ANS-1. Life (thought
to have) evolved in water
2. Water presents support for bodies of organisms
3. Water is a prime factor of the cytoplasm
four. Water is a general solvent
five. Water is a metabolite in metabolic reactions (condensation, hydrolysis)
6. Water stabilises outside temperatures
7. Water critical in cooling internal temperature of organisms
Give residences of water which might be essential in Biology - ANS-Polar molecules:
Dissolves charged debris/ Acts as an general solvent
Metabolite: Involved in metabolic reactions which include condensation and hydrolysis
Water molecules stick collectively, cohesive bonds among water molecules: Provides floor
tension/ prevents columns of water breaking
High particular warmth capability: Reduces fluctuations in temperature (of water bodies)
High latent warmth of evaporation: Evaporation of small amount if water cools an organism
Give the importance of hydrogen bonds in water - ANS-1. Gives it high balance
2. Large quantity of energy had to raise the temperature of the water.
3. Oceans and lakes provide a solid environment in which organisms can live in
four. Large quantity of heat is required to evaporate water so it's far very beneficial for
cooling
E.G Organisms sweat to calm down
Describe what happens when water decreases in temperature - ANS-Water molecules much
less able to hydrolyse the hydrogen bonds as they have less kinetic strength.
Semi-crystalline shape is shaped, which holds the water molecules apart, making ice less
dense than water for this reason it floats.
This method that it insulates the water below, allowing organisms within the liquid water to
live on
Explain another impact at the plant as a result of the evaporation of water from its leaves -
ANS-1. Cools leaves
2. Evaporation uses heat from leaves
Explain the which means of the terms Hydrophilic and Hydrophobic and provide one
example for every - ANS-Hydrophillic: Will mix/dissolve in water
instance: Any named ion (calcium/sodium) any named gas
Hydrophobic: Will now not mix with/dissolve in water instance: Lipid
Explain why water may be used as a medium for chemical reactions produced via
respiratory and photosynthesis - ANS-Water is a superb solvent
Water is liquid over a wide range of temperatures
Explain why water is a superb solvent for different polar molecules (Such as ammonia and
ethanol) and ionic substances - ANS-Polar:
Cant have interaction with the charged areas and dissolve the substance
Ionic:
Water molecules cluster across the ions and separate them, dissolving the substance
Explain why water is considered so critical for life to occur (6 marks) - ANS-1. Life (thought
to have) evolved in water
2. Water presents support for bodies of organisms
3. Water is a prime factor of the cytoplasm
four. Water is a general solvent
five. Water is a metabolite in metabolic reactions (condensation, hydrolysis)
6. Water stabilises outside temperatures
7. Water critical in cooling internal temperature of organisms
Give residences of water which might be essential in Biology - ANS-Polar molecules:
Dissolves charged debris/ Acts as an general solvent
Metabolite: Involved in metabolic reactions which include condensation and hydrolysis
Water molecules stick collectively, cohesive bonds among water molecules: Provides floor
tension/ prevents columns of water breaking
High particular warmth capability: Reduces fluctuations in temperature (of water bodies)
High latent warmth of evaporation: Evaporation of small amount if water cools an organism
Give the importance of hydrogen bonds in water - ANS-1. Gives it high balance
2. Large quantity of energy had to raise the temperature of the water.
3. Oceans and lakes provide a solid environment in which organisms can live in
four. Large quantity of heat is required to evaporate water so it's far very beneficial for
cooling
E.G Organisms sweat to calm down
