Exponents and Powers for Class VIII Mathematics

KENDRIYA VIDYALAYA SANGATHAN

CCT TEST ITEMS
CLASS VII: CHAPTER 13: EXPONENTS AND POWERS

S. NO. TITLE OF TEST ITEM
1. CELLS OF BLOOD
2. DESERTS OF WORLD
3. DISTRIBUTION OF MONEY
4. GRAVITATIONAL FORCE
5. GREEDY TRADER
6. GROWTH OF BACTERIA
7. HALF LIFE EXPONENTIAL DECAY
8. HOW FAR AWAY IS THE SUN?
9. MILKY WAY
10. SIZE OF VIRUSES AND BACTERIA

, Domain: Theme/ Topic: Class: VII
Mathematical Literacy Exponents and Powers Expected Time: 10 Minutes
Total Credits: 08
Learning Outcomes:
To develop an interest in students to study Mathematics as discipline.
To develop positive attitude to think, analyze and articulate logically.
Compassion of values (Evaluate).
Applicability of exponents and power in daily life. (Interpret & Formulate).

UNIT 1 - CELLS OF BLOOD
When a person gets infected or become sick, Doctor advises him for blood test. Pathologist finds the number
of cells in per cubic millimeter of blood. His blood report shows the following values -
Red blood cells count (RBC). --. 4.45 x 106 per mm3
White blood cells count (WBC) --. 8.9 x 103per mm3
(Leucocytes)
Platelets count --. 3.02 x 105 per mm3
Hemoglobin --. 12.8 GM%

Question (1)- The ratio between RBCs and WBCs is
(a) 500 : 1
(b) 1 : 500
(c) 550 : 1
(d) 1 : 100

Question (2) - What is the total number of RBCs and Platelets.


Question (3) - in the sample, which are more WBCs or Platelets?


Question (4) - A microscope helps to see the cell. It has an objective lens and an eyepiece. The objective lens
can magnify an object 103 times and the eyepiece can further magnify an object 10 2 times. What is the
maximum magnification on the microscope?


Credit Pattern:
Full Credit 02
Partial Credit 01
No Credit Nil

Description of Answer Key and Credits:
Q No Answer Credits
1 (a) For right answer full credit, otherwise no credit
2 4.752 x 106 per mm3 For right answer full credit, otherwise no credit
3 Platelets are more.
4 105 times For right answer full credit, otherwise no credit


Name of the teacher / item writer B N Bhalla
Designation TGT Maths
Email
Phone Number 9058575676
Name of the Vidyalaya KV NO.1, AFS, AGRA
KVS Region Agra

, Domain: Theme/ Topic: Class: VII
Mathematical Literacy Exponents and Powers Expected Time: 8 Minutes
Total Credits: 08
Learning Outcomes:
To develop an interest in students to study Mathematics as discipline.
To develop positive attitude to think, analyze and articulate logically.
Compassion of values (Evaluate).
Applicability of exponents and power in daily life. (Interpret & Formulate).

UNIT 2 - DESERTS OF WORLD
On our Planet Earth approximately 71% is covered with water and 29% is land, out of this some area is covered
by deserts in different continents. The deserts of world are given in the following table.

S. No. Deserts of World Area ( Square Km.)
1 Kalahari, South Africa 932400
2 Thar, India 199430
3 Gibson, Australia 155400
4 Great Victoria, Australia 647500
5 Sahara, North Africa 8598800

Question (1)- Write the area of Sahara desert in standard form.


Question (2)-After writing in standard form, Arrange these values in ascending order.


Question (3)-Using the data in given table, findthe total desert area in Africa in standard form.


Question (4)-The ratio of area of Kalahari and Gibson desert is
(a) 1 : 4
(b) 3 : 2
(c) 6 : 1
(d) 1: 2

Credit Pattern:
Full Credit 02
Partial Credit 01
No Credit Nil

Description of Answer Key and Credits:
Q No Answer Credits
1 8.5988 x 106 sq.km For right answer full credit, otherwise no credit
2 1.554 x105<1.9943 x105 < 6.475 x105 < 9.324 For right answer full credit, otherwise no credit
x105 < 8.5988x106
3 9.5312 x 106 For right answer full credit, otherwise no credit
4 (c) For right answer full credit, otherwise no credit

Name of the teacher / item writer B N Bhalla
Designation TGTMaths
Email
Phone Number 9058575676
Name of the Vidyalaya KV NO.1, AFS, AGRA
KVS Region Agra