WATER AND SOLUTION (PART 1)

Water is a ...........................

• mixture

• element

• compound

Water is made up of two different elements which are ...................... and ...........................

• 1 molecule of hydrogen, 2 molecules of oxygen

• 2 molecules of hydrogen, 1 molecule of oxygen

• 1 carbon, 1 hydrogen and 1 oxygen

Choose ALL the correct physical characteristics of water.

• Colourless

• Odourless

• Tasteless

• Liquid in room temperature

• No density

The melting point of pure water is .................  $\degree$ C

• -2

• 0

• 2

• 100

The boiling point of pure water is ..............  $\degree$ C

• 100

• 102

• 0

• -2

The process of ice cube changes into water is know as ...................

• melting

• condensation

• boiling

• sublimation

The process of water changes into water vapour is known as .......................... and .............................

• evaporation

• condensation

• boiling

• melting

The process of water vapour changes into water is known as .............................

• sublimation

• boiling

• condensation

• freezing

This process involved the release of high amount of heat energy from water and makes the water molecules to become closer to each other in fixed position.

• Melting

• Freezing

• Boiling

• Condensation

The process involved in the changes of ice cube into water vapour or vice verse.

• Condensation

• Sublimation

• Freezing

• Melting