Umiejętności z tego działu sprawdza 21 zadań wzorowanych na arkuszach IB z lat 2022–2026. Dział pojawia się w 17 z 54 arkuszy w bazie.
A sea otter loses body heat more rapidly when immersed than when resting in air at the same temperature. Which difference between the two surroundings best explains the need for dense insulating fur? A. Water transfers thermal energy away from the body more…
A small insect rests on a pond with its feet making slight depressions in the surface. Which molecular interaction primarily supports the surface film? A. Covalent bonds form between the water and the insect cuticle B. Hydrogen bonds attract neighbouring water…
Which model correctly places the partial charges within an isolated water molecule? A. Model A B. Model B C. Model C D. Model D
A model of liquid water uses a label on each oxygen atom to show the charge caused by unequal sharing of bonding electrons. Which label is appropriate? A. A full positive charge, + B. A partial negative charge, δ− C. A full negative charge, − D. No…
Compared with nearby land, a deep lake changes temperature slowly when the same amount of energy is supplied per kilogram. Which explanation accounts for this thermal stability? A. Breaking covalent O–H bonds gives water a low heat capacity B. Hydrogen bonds…
A small water-strider rests on the surface of a still freshwater pool without breaking through it. Which property directly supports its weight? A. Surface tension B. Transparency C. High specific heat capacity D. Adhesion to mineral surfaces
A survey compares four rocky worlds with atmospheres capable of retaining surface pressure. Which world has the temperature conditions most compatible with persistent liquid surface water? World | Typical surface range / °C | Atmospheric information P | −155…
Distinguish two physical properties of water from those of air.
Describe two physical adaptations that help a harbour seal live in water.
Water influences the operation of organisms and the stability of their environments. (a) Outline how cohesion between water molecules benefits organisms. (b) Describe ecological consequences of ice loss and altered ocean circulation. (c) Explain how hormones…
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