CBSE Class 8 - Science - REACHING THE AGE OF ADOLESCENCE

REACHING THE AGE OF ADOLESCENCE

Q & A Based NCERT Class 8 Science Chapter


Q 1: List the changes occur during adolescent age.

Answer:
CHANGES OCCUR AT ADOLESCENT AGE:
1) INCREASE IN HEIGHT
2) DEVELOPMENT OF HAIR
3) SEXUAL FEELING
4) VOICE CHANGES
5) CHANGE IN BODY SHAPE
6) CHANGE IN BEHAVIOUR AND ATTITUDES
7) ACTIVITY OF SWEAT AND OIL GLANDS


Q 2: What is the function of endocrine system? What is it made up of?

Answer: There are a number of other slower processes that go on in the body, such as growth such processes are primarily controlled by the endocrine system.

The endocrine system consist of a number of ductless glands that secrete hormones.


Q3: What is Adam's apple?

Answer: Adam's apple: The protruding part of the throat is called Adam’s apple. It is the enlarged voice box or larynx which gets enlarged and visible from outside in boys at the onset of puberty. This makes the voice of boys hoarse.


Q 4: Name four body processes that hormones control?

Answer: Growth behavior, development and reproduction are controlled by hormones.

CBSE Open Text Based Assessment (OTBA) for classes IX & XI, 2017 is Available

Open Text Based Assessment (OTBA) 

For classes 

IX & XI  2017

Available Now

OTBA Material for Class 9 and Class 11 for this session (2016-2017) is available at CBSE website. Here are the links to download the pdfs.

Open Text Material for Class IX

Subject- English
Subject- Hindi
Mathematics - English - Hindi
Science - English - Hindi
Social Science - English - Hindi

CBSE Class 7 - Hindi - नीलकंठ - प्रश्न - उत्तर (भाग -१ )

नीलकंठ 

प्रश्न - उत्तर

(भाग -१ )

प्र.1 “जब मैंने वह पिंजड़ा कार में रखा तब मानो वह जाली के चौखटे का चित्र जीवित हो गया।”- इस पंक्ति का अर्थ स्पष्ट करें ।

उत्तर – पिंजड़े की संकीर्णता के कारण मोर-शावकों का हिलना-डुलना भी मुश्किल था। वे उसमें तार के गोल फ्रेम में जुड़ी तस्वीर की तरह स्थिर दिखाई देते थे, परन्तु कार में पिंजड़ा रखे जाने के बाद जब उनकी हलचल शुरू हुई तो ऐसा लगा जैसे जालीदार पिंजड़े का चित्र सजीव हो गया ।


प्र.2 लेखिका ने मोर के विकास को चमत्कारिक क्यों कहा है?

उत्तर- लेखिका ने मोर के विकास को चमत्कारिक कहा है क्योंकि मोर के सिर की कलगी घनी, लम्बी, और चमकीली हो गई थी| चोंच नुकीली और  पैनी हो गयी थी। आँखों में  नीली चमक आ गयी थी और लम्बी नीली-हरी गर्दन में धुपछाँही तरंगे दिखने लगी थीं।


प्र.3 मोर-मोरनी का नामकरण किस आधार पर किया गया?

उत्तर- नीलाभ  ग्रीवा के कारण मोर का नाम नीलकंठ रखा गया और मोरनी सदा मोर की छाया के समान रहती थी इसलिए राधा कहलाई ।


प्र.4 ‘मंथर’ , ‘छाया’, मंद,  'उष्णता'  शब्दों के विपरीतार्थक शब्द लिखिए ।

उत्तर- शब्द  विलोम
मंथर  द्रुत (तेज )
छाया  धूप
          मंद  उच्च,तीव्र
         उष्णता शीतलता

CBSE Class 10/9/8 - English Grammar - Types of Prepositions

Types of Prepositions

I n the earlier post you have learned about forms of preposition. As we know a Preposition is a word place before a Noun (or Pronoun) to show in what relation the person or thing denoted by the Noun stands to something else.

Prepositions are mainly of five types:

① Preposition of Place

② Preposition of Time

③ Preposition of Direction

④ Preposition of Movement

⑤ Preposition of Position

① Preposition of Place: There are three prepositions of places:

⒜ At - used for a point of place (for small towns, villages or less important or small places)

e.g.

At home

At the exit/entrance

At work

He lives at Meharauli in Delhi.

At school

⒝ In - Used for spaces, for large places, countries, large towns, state of rest or position inside anything.

e.g.

He lives in Delhi.

In the mall

He is in his room.

He lives at Panji in Goa.

Class 12 - Business Studies - Different Types of Plan

Different Types of Plan

Question: What is a business plan?

Answer: A detailed written statement that describes the nature of the business, the target market, the advantages the business will have in relation to competition, and the resources and qualifications of the owner(s).It is a document that outlines how goals are going to be met.

Different Types of Plan:

Plans are made based on Strategic planning, tactical planning, operational planning and contingency planning.

CBSE Class 9 - Hindi (B) - अग्निपथ - कविता का सारांश

अग्निपथ

हरिवंशराय बच्चन (१९०७-२००३)

वृक्ष हो भले खडे,

हों घने, हों बडे,
एक पत्र छाहं भी,
मांग मत, मांग मत, मांग मत,
अग्निपथ, अग्निपथ, अग्निपथ |

तू न थकेगा कभी,
तू न थमेगा कभी,
तू न मुडेगा कभी,
कर शपथ, कर शपथ, कर शपथ,
अग्निपथ, अग्निपथ, अग्निपथ |

यह महान दृश्य है,
चल रहा मनुष्य है,
अश्रु, स्वेद, रक्त से,
लथपथ, लथपथ, लथपथ,
अग्निपथ, अग्निपथ, अग्निपथ |

कविता का सारांश

CBSE Class 10 - Maths - Arithmetic Progressions ( Questions and Answers)

Arithmetic Progressions

Class 10 NCERT Exemplar Chapter Solutions

Q 1(MCQ): In an AP, if d=-4,a_n=7 and a_n=4, then a is equal to

(a) 6

(b) 7

(c) 20

(d) 28

Answer: (d) In an AP, a_n=a+(n-1)d
⇒ 4=a+(7-1) (-4)
⇒ 4=a+6(-4)
⇒ 4+24=a
∴ a=28


Q 2(mcq): In an AP, if a=3.5,d=0 and n=101, then a_n will be
(a) 0

(b) 3.5

(c) 103.5

(d) 104.5

Answer: (b) 3.5
For an AP, a_n =a+(n-1)d=3.5+(101-1)×0
∴ =3.5


Q 3(mcq): The list of numbers are -10,-6,-2,2,.... is

(a) an AP with d=-16

(b) an AP with d=4

(c) an AP with d=-4

(d) not an AP

Answer: (b) The given numbers are -10,-6,-2,2...is
Here, a₁ = -10,
          a₂ = -6,
          a₃ = -2
    and a₄ =2...

Since, a₂ - a₁ = -6-(-10)

           = -6+10=4

   a₃-a₂= -2-(-6)

           =-2+6=4

   a₄-a₃=2-(-2)
            =2+2=4
Each successive term of given list has the same difference i.e.,4.
So, the given list forms an AP with common difference, d=4.


Q 4(mcq): The first four terms of an AP whose first term is -2 and the common difference is -2 are

(a) -2,0,2,4

(b) -2,4,-8,16

(c) -2,-4,-6,-8

(d) -2,-4,-8,-16

Answer: (c) -2,-4,-6,-8
Let the first four terms of an AP are a,a+d,a+2d and a+3d.
Given, that first term, a=-2 and common difference, d=-2, then we have an AP as follows
     -2,-2,-2,-2+2(-2),-2+3(-2)
= -2,-4,-6,-8