1.1. AGUA (NM y NS) BI Tema A1.1 | WATER (SL/HL) IB Biology - YouTube

Under the IB Biology curriculum, which specific topic designation corresponds to the study of Water (Agua) for Standard Level (NM) and Higher Level (NS)?

Topic A1.1 (Tema A1.1).

What are the six vital processes outlined in Probiología's Topic A1.1 lecture that depend directly on water?

Metabolism (metabolismo), nutrition (nutrición), transport (transporte), reproduction (reproducción), excretion (excreción), and homeostasis (homeostasis).

What type of intramolecular chemical bonds hold the hydrogen and oxygen atoms together within a water molecule?

Polar covalent bonds (enlaces covalentes polares).

How are the unequal charge distributions represented in a polar water dipole?

As partial positive ($\delta+$) and partial negative ($\delta-$) charges.

What type of intermolecular bonds form between neighboring water molecules due to their polarity?

Hydrogen bonds (puentes de hidrógeno).

How is the property of 'cohesion' (cohesión) defined in the context of water molecules?

The property whereby water molecules are attracted to each other (moléculas de agua se atraen entre sí).

Which property of water at liquid surfaces is directly generated by the cohesive forces between water molecules?

Surface tension (tensión superficial).

What key physiological process in plants relies directly on water's cohesive and adhesive properties?

Water transport in plants through the xylem (transporte de agua en plantas a través del xilema).

What term describes the combined action of cohesion and adhesion that allows water to move through narrow tubes or spaces?

Capillarity or capillary action (capilaridad / acción capilar).

Why is water referred to as the 'universal solvent' in living systems?

Because it dissolves a wide range of substances, serving as the essential medium for metabolic reactions, nutrition, and biological transport.

Into what two primary categories are chemical substances divided based on their affinity for or repulsion by water?

Hydrophilic substances (sustancias hidrofílicas) and hydrophobic substances (sustancias hidrofóbicas).

What is the density anomaly of water compared to nearly all other substances?

Water is the only substance whose solid phase (ice) is less dense than its liquid phase, allowing ice to float.

At the molecular level, why does ice have a lower density than liquid water?

Hydrogen bonds lock the molecules into an ordered, open crystal lattice structure that holds water molecules further apart than in liquid form.

How is the physical property of 'viscosity' (viscosidad) defined in relation to water?

The internal resistance of water to flow (resistencia del agua a fluir).

Which physical property measures water's ability to conduct or transfer heat?

Thermal conductivity (conductividad térmica).

Which thermal property of water requires large amounts of energy to change its temperature, thereby assisting in thermoregulation?

High specific heat capacity (calor específico).

Which two animals are compared in IBMaster's video to illustrate physical adaptations to water's density and thermal properties?

The Ringed seal (Foca Anillada) and the Arctic loon (Colimbo Ártico).

According to the Higher Level (NS/HL) syllabus of Topic A1.1, from what extraterrestrial bodies is water proposed to have arrived on Earth?

Asteroids (asteroides).

What astronomical concept, exclusive to the NS/HL level, explains the orbital zone around a star that enables liquid water to persist on Earth?

The Goldilocks Zone (Zona Ricitos de Oro).

What is the official title of Block 1 in Probiología's 2025 IB Biology syllabus?

Block 1: Molecules: the bases of life (Bloque 1: Moléculas: las bases de la vida / 1. Molecules (SL & HL)).

What is the topic title and number that immediately follows Topic A1.1 Water in the Block 1 curriculum?

Topic A1.2: Nucleic Acids (1.2. Ácidos Nucleicos / La Información Genética).

Under what syllabus code is 'Hydric Potential' (Potencial Hídrico) taught in the Probiología IB course series?

Topic D2.3 (Tema D2.3).

Which two solutes are explicitly used in the Topic D2.3 curriculum to illustrate the chemical process of solvation in water?

Sodium chloride (cloruro sódico / $NaCl$) and glucose (glucosa).

What osmotic cellular outcomes are analyzed for red blood cells and plant cells, respectively, in the hydric potential module?

Crenation and hemolysis/lysis in red blood cells; plasmolysis and turgor pressure in plant cells.

Who is the instructor specializing in the International Baccalaureate (IB) who created the Probiología series?

Adrián.