We look forward to seeing the results!
Karen Morrison
GRADE
8 MATHEMATICS
INVESTIGATION
WATER USAGE
IN THE HOME
INSTRUCTIONS :
1.
You need to
use the water
account that your
parents receive each
month to answer
the questions provided.
2.
You also need
to take readings
from the water
meter located on
your parent’s
property to complete
the table provided.
3.
Answer the questions
on A4 paper
which must be
handed in with
your table and
graphs in a
flip-file or ring
file.
4.
You may type
your answers on
a computer.
Marking rubric :Presentation 5 marks
Table 5
marks
Graph 5
marks
Questions 30
marks
Effort 5
marks
___________________
TOTAL 50 marks
SOME
INTERESTING FACTS ABOUT
ABOUT WATER :
-
water covers
75% of the
earth
-
about 65% of
your body consists
of water
-
to stay
healthy you should
drink about 2
litres of water
daily
-
water is
found in 3 forms
: liquid, solid
& gas
-
we measure
water in milliliters,
litres or kilolitres
-
dirty water
contains bacteria which
may cause cholera
or diarrhea
-
water makes
up 70% of
an elephant’s body,
30% of bread
and 90% of
tomaotes
PROVISION and USAGE OF HOUSEHOLD WATER
1.
Write a paragraph
explaining who is
responsible for providing
water to your
home,
where does it
come from and
how is it
supplied. Investigate whether
it is purified,
and where and
how is this
done and why
is purification necessary.
2. How is
the water used
in your home
monitored ?
3.
In what unit
is water usage
measured ? ( look at
monthly water account)
4.
Read the water
meter at the
same time each
day for 1
week and complete
the
table
provided on a
daily basis.
5.
Why is it
important to read
the meter at
the same time
each day ?
6.
Calculate the quantity
of water used
each day
7.
What is the
charge per kilolitre
of water used ?
8.
List the uses
of water in
the home.
9.
Estimate the quantity
of water that
is used per
day for each
of the items
listed
above.
10.
Is there any
wastage of water in
the home ? Give
details of such
wastage.
11.
Why should people
use water economically ?
12.
Explain several ways you could
go about saving
water in the
home.
13.
Determine the total
quantity of water
your family used
in the 7
day period
14.
What is the
average daily rate of
consumption for the 7 day
period ?
15.
What is the
range in consumption
over the 7 days
?
16.
Draw a graph (line or bar graph) to show
the daily usage
of water over
the 7 days.
17.
On which day
did you use
the least amount
of water ? Give
possible reasons
for
this.
18.
On which day
did you use
the most amount
of water ? Give
possible reasons
for
this.
19.
What is your
water bill for
the each of
the last 3
months ?
20.
Calculate the mean amount paid
over these 3
months
TABLE
TO SHOW WATER METER READINGS :
|
Days
|
Water
meter reading at the end of each day
|
|
0 (reading on day
before investigation begins)
|
|
|
1
|
|
|
2
|
|
|
3
|
|
|
4
|
|
|
5
|
|
|
6
|
|
|
7
|
|
GRAPH TO SHOW WATER USAGE PER
DAY
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