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WorksheetsMrs Disney Y10 - Chemistry Clean water
Total questions: 30
Worksheet time: 21mins
Name
Class
Date
1.
people need clean water for raising crops and animals needed for food and for
a)
drinking
b)
washing
c)
whistling
d)
both a and b
2.
runoff carries chemicals form road ways in to
a)
lakes
b)
rivers
c)
oceans
d)
all of the above
3.
local clean-up programs can help stop water pollution by removing rubbish from
a)
lakeshore
b)
river banks
c)
streets
d)
both a and b
4.
you can save water in the bathroom by making sure toilets and sinks
a)
run all night
b)
do not leak
c)
drip constantly
d)
freeze
5.
Which of these effect the water quality of a river?
a)
the type of fish that swim in the river
b)
the number of people that live near the river
c)
the type of boats that travel on the river
d)
all of the above
6.
Turning the water off while you brush your teeth is an example of
a)
water conservation
b)
water clarity
c)
water purification
d)
water filtration
7.
How could pesticides get into lakes and streams?
a)
too much could be used
b)
it could be sprayed too close to a stream
c)
rain could wash pesticides into a stream
d)
all of the above
8.
What is the main reason why water is not desalinated?
a)
don't know how
b)
too expensive
c)
difficult to transport
d)
inaccessible
9.
Most freshwater is ________________.
a)
in aquifers
b)
frozen in ice caps and glaciers
c)
in the atmosphere as water vapor
d)
found in lakes
10.
Water with a pH from ____ to ____is considered safe.
a)
1 to 4
b)
4 to 6
c)
6.5 to 8
d)
9 to 12
11.
What is a neutral pH level?
a)
5
b)
6
c)
7
d)
8
12.
What is an example of agricultural runoff?
a)
fertilizers and pesticides draining into water source
b)
oil and gasoline draining into water source
13.
What is the first step in the water treatment process?
a)
coagulation
b)
filtration
c)
flocs
d)
concentation
14.
Boiling water and collecting steam to isolate fresh water from salt water is best known as...
a)
water purification
b)
water pollution
c)
groundwater recharging
d)
desalination
15.
Why is filtration an important part of water treatment?
a)
Filtration guarantees a clear coloring in water.
b)
Filtration removes small particles from the water.
c)
Filtration adds chlorine to water to kill microorganisms.
d)
Filtration adds vitamins and minerals to drinking water.
16.
What word means the solid particles that have settled out during the sedimentation process.
a)
sediment
b)
solubility
c)
settlement
d)
solidifying
17.
This process kills germs and bacteria and makes water safe to drink
a)
Sedimentation
b)
Chlorination
c)
Carbonation
d)
Filtration
18.
This process allows us to drink ocean water.
a)
filtration
b)
coagulation
c)
desalination
d)
sewage
19.
These are tiny particles
a)
alum
b)
floc
c)
sludge
20.
What is the purpose of chlorine?
a)
make water smell clean
b)
disinfect
c)
create floc
d)
make water clear
21.
The cleaning process of putting water through several screens
a)
coagulation
b)
sedimentation
c)
filtration
d)
aeration
22.
Waste water and solid waste
a)
sludge
b)
sewage
c)
floc
23.
What is all the water that runs off the surface of the land and washes into rivers, streams, and other waterways called?
a)
Runoff
b)
Storm Drain
c)
Surface Water
d)
Tributary
24.
Eutrophication is caused by
a)
runoff of excessive fertilizer and nutrients
b)
cleaning up waterways
c)
using nuclear energy
d)
using solar energy
25.
Which of the following is a way to save water?
a)
Water the lawn at high noon
b)
washing half loads of dishes
c)
taking shorter showers
d)
running the water while brushing your teeth
26.
Bacteria, viruses, and parasitic worms are considered ________ and must be removed from water.
a)
heavy metals
b)
solid waste
c)
pathogens
d)
poisons
27.
Chlorine is added to water during treatment. Why?
a)
to remove large debris
b)
to kill pathogens
c)
to remove heavy metals
d)
to improve tooth health
28.
When something is made dirty or harmful, it is _____________.
a)
invisible
b)
polluted
c)
solid
d)
important
29.
Having a pH of 4 means that the liquid is more ____________
a)
acidic
b)
basic
30.
What is the first step in the water treatment process?
a)
coagulation
b)
filtration
c)
flocs
d)
concentation
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