y11 AQA using resources

What is the first step of preliminary wastewater treatment, which removes large items such as plastic wrappers and sticks?

• screening - employs the use of a "bar screen"

• sedimentation

• aeration

• disinfection

The cleaning process of putting water through several screens

• coagulation
• sedimentation
• filtration
• aeration

How long should you boil water for to make it potable?

• 2 hours

• 1 minute

• 5-10 minutes

• 30-40 minutes

Waste water and solid waste is called

• sludge

• sewage

• floc

What does chlorination do to the water?

• Removes microorganisms
• Cleans the water
• Makes the water taste nice
• Removes twigs and sediment

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Salt dissolved in water.  
What method would you use to separate this mixture?

• sorting by hand
• distillation
• chromatography

What does "potable" mean?

• Safe to drink

• Frozen

• Liquid water

• Dirty water

Why is distilling sea water to make drinking water expensive?

• uses a lot of chemicals
• it's slow
• needs expensive equipment
• takes lots of time
• takes a lot of energy

Which is a method of water treatment?

• Anaerobic digestion
• Cracking
• Electrolysis
• Phytomining
• Desalination

Name the process that uses plants to absorb metal compounds. 
The plants are then burned and the ash contains the copper compounds.

• Bioleaching
• Electrolysis
• Phytomining
• Fractional distillation