Page 308 - ICSE Math 8

PLAYING WITH NUMBERS
Integrated with Chemistry
The modern periodic table organizes elements into a grid based on their atomic number. Given below is a
portion from the periodic table. Find the elements whose atomic number is divisible by 2, 3 and 4 using the
divisibility rules.

104 105 106 107 108 109 110 111 112 113 114 115 116 117 118
Rf Db Sg Bh Hs Mt Ds Rg Cn Uut Fl Uup Lv Uus Uuo

SET THEORY
Integrated with Computers
Create a PowerPoint presentation based on your knowledge of set theory. Insert the related images and videos
to make the concept interesting. You may use any other presentation software also.

PERCENTAGE
Integrated with Chemistry
The term ‘percentage error’ is used in science to find the difference between the experimental
and accepted values.
You are given a brick of pure copper. The experimental density of copper comes out to be
3
3
8.78 grams/cm . The accepted density of copper is 8.96 g/cm . What is the percentage error?
Experimental value – Accepted value × 100%
Hint: Per cent error =
Accepted value
RATIO AND PROPORTION

Integrated with Home Science
Let’s cook-up some magic!
The following ingredients are used to bake 3 dozen cookies.
1 1
• 1 cup flour • tsp. baking soda • tsp. salt
2 2
1 1 1
• cup butter • cup brown sugar • cup sugar
2 3 3
1
• 1 egg • tsp. vanilla • 1 cup chocolate chips
2
If you want to make 9 dozen cookies, how will the amount of ingredients change?.

DIRECT AND INVERSE VARIATIONS
Integrated with Biology
The population of a certain species of bacteria varies directly with the temperature.
When the temperature is 35⁰, there are 7 million bacteria. How many millions of
bacteria will be there when the temperature increases to 38⁰? Assume that all the
other factors remain constant.

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