hydrosphere 1

Water is a very important _________ for our planet.

Water is in living and

non-living things and has specific ____.

Liquid water doesn’t have _____

• a colour, a flavour or a property

• a colour, a flavour or an odour

• a colour, a melting point or an odour

• a colour, a solvent or an odour

The melting point is...

• is the

  temperature when solid water

  (ice) starts to change into liquid.

• is the

  temperature when bubbles of

  water vapour start to form inside

  the liquid water.

The boiling point is...

• is the

  temperature when solid water

  (ice) starts to change into liquid.

• is the

  temperature when bubbles of

  water vapour start to form inside

  the liquid water.

The melting point...

• This occurs at 0 °C.

• This occurs at 100 °C.

• This occurs at 1 °C.

• This occurs at 4 °C.

The boiling point...

• This occurs at 0 °C.

• This occurs at 100 °C.

• This occurs at 1 °C.

• This occurs at 4 °C.

Why is water called a universal solvent ?

• Because solid

  water is less dense than liquid

  water.

• Because water molecules join together

  with other water molecules and with different molecules.

• because it can dissolve more

  substances than any other liquid.

• Because water needs a

  lot of energy to increase its temperature by 1 °C.

Why can ice float?

• Because solid

  water is less dense than liquid

  water.

• Because water molecules join together

  with other water molecules and with different molecules.

• because it can dissolve more

  substances than any other liquid.

• Because water needs a

  lot of energy to increase its temperature by 1 °C.

Small animals can stand on the surface of water

• true

• false