Water treatment system

When dirty water sits for a few minutes, most of the dirt will...

• float to the top

• fall to the bottom

• stop moving

• move faster

When dirt falls to the bottom of a still container, it is called...

• filtration

• sedimentation

• flocculation

• water treatment process

When water moves downwards through gravel, sand and anthracite, it is called...

• sedimentation

• filtration

• flocculation

• water treatment process

Sedimentation gets rid of _____ participles and filtration gets rid of _____ particles.

• larger, smaller

• smaller, larger

• darker, lighter

• lighter, darker

Why do we add chemicals at the beginning of the water treatment process?

• to protect our teeth

• to make the water cleaner

• to help small particles stick together

• to help the particles in filtration

Where is the water before it enters the water treatment process?

• Dongjiang

• clouds

• reservoirs

• filtration tank

Tags

NGSS.MS-ESS2-4

What is the function of chlorine in the water treatment process?

• flocculate particles

• kill bacteria in the water

• raise pH level of water

• make the water treatment process faster

Why do we need a water treatment system?

• so we can water plants

• to help the water cycle go faster

• to make water safe to drink

• to help the fish in the ocean

Which of the following will make the best filter?

• gravel and sand

• gravel and anthracite

• anthracite and sand

• gravel, anthracite and sand

What are the 2 main processes in water purification?

• flocculation

• sedimentation

• filtration

• storage