WorksheetsIB DP Biology - A1.1 Water Review
Total questions: 29
Worksheet time: 15mins
What type of bond holds the hydrogen and oxygen atoms together within a single water molecule?
Ionic bond
Covalent bond
Hydrogen bond
Peptide bond
The ability of water molecules to form hydrogen bonds is due to:
The symmetrical shape of the molecule
The high molecular weight of water
The partial positive and negative charges on hydrogen and oxygen
The presence of free electrons on oxygen
What type of bond forms between separate water molecules?
Covalent bond
Ionic bond
Hydrogen bond
Van der Waals interactions
Cohesion in water is primarily due to:
Covalent bonds between molecules
Hydrogen bonding between molecules
Adhesion to other surfaces
The presence of dissolved ions
Which of the following best explains why water has a high surface tension?
Water has low molecular weight
Hydrogen bonding pulls molecules tightly at the surface
Water has a high heat capacity
Water molecules have weak intermolecular forces
Water is an excellent solvent because:
It can dissolve all substances
It forms hydrogen bonds with nonpolar molecules
Its polarity allows it to dissolve ionic and polar substances
It has low molecular mass
Why does water have a high specific heat capacity?
Water is a small molecule
Hydrogen bonds absorb heat before breaking
Water has a high molecular mass
Water is nonpolar
Why is sweating an effective cooling mechanism in humans?
It increases body heat production
It releases excess carbon dioxide
Water has a high latent heat of vaporization, allowing heat loss
It reduces energy use in cells
Why does ice float on water?
Ice is denser than liquid water
Ice contains more oxygen atoms
Ice has a lower density than liquid water due to hydrogen bonding
Ice has higher kinetic energy than water
What would happen if ice were denser than liquid water?
Ice would float more easily
Aquatic ecosystems would be unaffected
Ice would sink, potentially freezing entire bodies of water
Water would evaporate more slowly
Which property of water allows it to act as a universal solvent?
Low specific heat capacity
Polarity and hydrogen bonding
High surface tension
High viscosity
Which of the following best explains why water is cohesive?
Water molecules form covalent bonds with each other
Hydrogen bonds between water molecules create cohesion
Water molecules repel each other due to polarity
Water has a high molecular mass
How does water’s high specific heat capacity benefit organisms?
It allows rapid changes in body temperature
It decreases enzyme activity
It increases the rate of gas exchange
It stabilizes internal and external environmental temperatures
Which of the following best describes the structure of a water molecule?
Two hydrogen atoms covalently bonded to an oxygen atom, forming a linear molecule
Two hydrogen atoms covalently bonded to an oxygen atom, forming a bent molecule
Two hydrogen atoms ionically bonded to an oxygen atom, forming a bent molecule
One hydrogen atom covalently bonded to two oxygen atoms, forming a linear molecule
Why is water considered a polar molecule?
It contains ionic bonds between hydrogen and oxygen
The oxygen atom is more electronegative, creating partial charges on the molecule
The hydrogen atoms share electrons equally with the oxygen atom
It can dissolve nonpolar substances easily
What type of bond forms between water molecules, creating many of its unique properties?
Covalent bonds
Ionic bonds
Hydrogen bonds
Metallic bonds
What makes water an excellent solvent for ionic and polar substances?
Its nonpolar nature and high density
Its ability to form hydrogen bonds and polarity
Its high boiling point and low freezing point
Its ability to freeze and expand
Which property of water allows insects to walk on its surface?
High specific heat capacity
Cohesion and surface tension
Adhesion and capillary action
Solvent properties
How does water’s high specific heat capacity benefit living organisms?
It provides a medium for chemical reactions
It allows water to dissolve ionic substances
It helps regulate temperature in the environment and organisms
It enables ice to float on liquid water
Why does ice float on water?
Hydrogen bonds are stronger in ice, making it denser
Ice contains fewer hydrogen bonds, reducing its density
Hydrogen bonds form a crystalline lattice that spaces water molecules apart
Water molecules in ice are heavier than in liquid water
What property/properties of water enables it to move against gravity in plant xylem?
Adhesion and cohesion
Surface tension only
High latent heat of vaporization
Solvent properties
Which of the following biological processes relies on water's high latent heat of vaporization?
Photosynthesis in plants
Temperature regulation through sweating
Transport of nutrients in blood
Formation of hydrogen bonds in proteins
Which property of water allows the black-throated loon to dive efficiently while reducing drag in water?
High specific heat capacity
Cohesion and surface tension
Universal solvent properties
Low latent heat of vaporization
Why does ice floating on water benefit the ringed seal in Arctic environments?
It provides an insulating layer, preventing the entire water body from freezing
It increases water density, making swimming more energy efficient.
It enhances the seal’s ability to find food near the ocean surface
It allows for better camouflage against predators.
Which property of water helps the black-throated loon maintain body temperature in cold environments?
Adhesion
Low boiling point
High specific heat capacity
Low heat of vaporization
How does water’s high latent heat of vaporization aid in the thermoregulation of black-throated loons?
It allows them to cool down efficiently through evaporation.
It reduces the risk of dehydration in cold environments.
It enables them to maintain stable internal salt concentrations.
It helps reduce ice formation in their feathers.
What role does cohesion and adhesion play in the ability of the black-throated loon to hunt underwater?
They help increase buoyancy, aiding in floating.
They prevent water loss from the loon’s body.
They allow water to stick to prey, making them easier to capture.
They reduce energy loss by minimizing water resistance.
Why does the high heat capacity of water benefit ecosystems where the black-throated loon and ringed seal live?
It increases the oxygen-carrying capacity of water.
It prevents rapid temperature fluctuations, stabilizing aquatic life.
It keeps the ice from melting too quickly in the summer.
It prevents water from evaporating in cold temperatures.
How does water’s solvent properties benefit the black-throated loon’s food web?
It allows essential nutrients to dissolve, supporting aquatic life.
It enables loons to excrete excess salts more efficiently.
It reduces water loss in cold environments.
It prevents toxic chemicals from accumulating in fish.
