Chapter 10a Water: management and properties

Fresh water is mostly found in

• oceans.

• surface/other fresh water.

• ground water.

• glaciers and icecaps.

Sustainability goal 6 is designed to

• ensure availability and

  sustainable management of water and sanitation for all.

• conserve and sustainably use the oceans, seas and marine resources for sustainable development.

• take urgent action to combat climate change and its impacts.

• protect, restore and promote sustainable use of terrestrial ecosystems, sustainably manage forests, combat desertification, and halt and reverse land degradation and halt biodiversity loss.

Sustainability goal 13 is designed to

• ensure availability and

  sustainable management of water and sanitation for all.

• conserve and sustainably use the oceans, seas and marine resources for sustainable development.

• take urgent action to combat climate change and its impacts.

• protect, restore and promote sustainable use of terrestrial ecosystems, sustainably manage forests, combat desertification, and halt and reverse land degradation and halt biodiversity loss.

Sustainability goal 14 is designed to

• ensure availability and

  sustainable management of water and sanitation for all.

• conserve and sustainably use the oceans, seas and marine resources for sustainable development.

• take urgent action to combat climate change and its impacts.

• protect, restore and promote sustainable use of terrestrial ecosystems, sustainably manage forests, combat desertification, and halt and reverse land degradation and halt biodiversity loss.

Ocean acidification can be caused by

• CO2 dissolving in water and ionising.

• marine organisms creating acids.

• bleached coral dissolving.

• increases in global temperatures.

Water is best described as

• a polar covalent molecular substance.

• an ionic compound.

• a non-polar covalent molecular substance.

• an ionic compound that has not fully separeted into ions.

The bonding present in water is best described as

• intramolecular polar covalent and intermolecular hydrogen bonding.

• intramolecular polar covalent and intermolecular dipole-dipole bonding.

• intermolecular polar covalent and intramolecular hydrogen bonding.

• intermolecular non-polar covalent and intramolecular dipole-dipole bonding.

Ice floats in water because it has a lower density

• True

• False

The most important consequence, for living things, of ice floating on water is:

• it prevents water below the surface freezing.

• it blocks out UV rays.

• it prevents CO2 dissolving into water.

• it eventually drops the temperature to the freezing point of water.

The trends observed in this graph are explained by:

• H₂O forming hydrogen bonds while the other molecules form dipole-dipole bonds.

• H₂O forming hydrogen bonds while the other molecules form dipole-dipole bonds and the strength of dispersion forces increases from H₂S to H₂Te.

• All molecules forming hydrogen bonds and the strength of dispersion forces increases from H₂S to H₂Te.

• H₂O forms the strongest dipole-dipole bonds and the strength of dispersion forces increases from H₂S to H₂Te.