Question 1
[Maximum number: 1]
Which characteristic of the ringed seal (Pusa hispida) is a consequence of the viscosity of water?
A
Streamlined body
B
Sharp teeth
C
Claws
D
Lungs
IB Biology HL A1.1 Water Question Bank
A1.1 Water
- A1.1.1—Water as the medium for life
- A1.1.2—Hydrogen bonds in water
- A1.1.3—Cohesion of water molecules
- A1.1.4—Adhesion of water
- A1.1.5—Solvent properties of water
- A1.1.6—Physical properties of water for aquatic animals
- A1.1.7 (HL)—Extraplanetary origin of water on Earth
- A1.1.8 (HL)—Search for extraterrestrial life and water
Question 1
[Maximum number: 1]
What property of water leads to aquatic environments having low fluctuations of temperature throughout the year?
A
High specific heat capacity because covalent bonding restricts molecular motion
B
Low specific heat capacity because covalent bonding restricts molecular motion
C
Low specific heat capacity because hydrogen bonding restricts molecular motion
D
High specific heat capacity because hydrogen bonding restricts molecular motion
Question 2
[Maximum number: 1]
It has been hypothesized that asteroids were the primary source of Earth's water. What has caused the retention of water on Earth?
A
The gases of the early atmosphere absorbed water vapour.
B
High atmospheric pressure prevented water vapour from escaping.
C
Temperatures on Earth allowed condensation of water.
D
Water was trapped in the pores of newly formed rocks.
Question 2
[Maximum number: 1]
Which planet in the table falls within the "Goldilocks zone" and may be capable of sustaining extraterrestrial life?
Planet
Temperature
Atmosphere
Gravity / g
Kepler-22b
-11 to 16
unknown
2.4
WASP-39b
750
hydrogen, helium and
other elements
25.0
Gliese 876d
50 to 80
high levels of toxic gases
20.0
Kepler-16b
-100
unknown
0.9
Question 5
[Maximum number: 1]
Where do hydrogen bonds form?
A
Between the slight negative charge of hydrogen and slight positive charge of oxygen within a water molecule
B
Between the slight positive charge of hydrogen and slight negative charge of oxygen within a water molecule
C
Between the slight positive charge of hydrogen and slight negative charge of oxygen in different water molecules
D
Between the slight negative charge of hydrogen and slight positive charge of oxygen in different water molecules
Question 6
[Maximum number: 1]
Which properties explain the ability of water to dissolve solutes?
I. Polarity of water molecules
II. High specific heat capacity of water
III. Hydrogen bonding
A
I and II only
B
I and III only
C
II and III only
D
I, II and III
Question 7
[Maximum number: 1]
Which can be explained by the solvent properties of water?
A
Sodium chloride is transported as and in blood.
B
Movement of water occurs under tension in the xylem.
C
Water is the coolant in sweat.
D
Ice floats on liquid water.
Question 2
[Maximum number: 4]
Water is the medium in which most processes of life occur.
Question 2(a)
(a)
Distinguish between the physical properties of water and air.
The ringed seal (Pusa hispida) can be found in the Arctic and sub-Arctic regions of the Pacific, Atlantic and Arctic Oceans.
[ 2 ]
Question 2(b)
(b)
Describe two physical adaptations of the ringed seal to live in water.
Ringed seals belong to more than one trophic level as they feed on zooplankton and fish. They are secondary consumers when they feed on zooplankton.
[ 2 ]
Question 3
[Maximum number: 5]
The figure represents a water molecule.
Question 3(a)
(a)
Draw a second water molecule to show how bonds can form between water molecules, including the name of the bond.
[ 2 ]
Question 3(b)
(b)
Water has important solvent properties. Explain these properties using an example to illustrate your answer.
[ 3 ]
Question 4
[Maximum number: 3]
The diagram shows water molecules as they might be arranged in liquid water and the interactions between them.
Question 4(a)
Question 4(a)(ii)
(a)
(i)
Identify the interactions that are shown between the water molecules.
[ 1 ]
Question 4(b)
Question 4(b)(i)
(b)
(i)
With reference to the diagram, explain how water in sweat evaporates.
[ 2 ]