CBSE Class 9 - Biology - CH 7 Diversity In Living Organisms - Very Short Questions and Answers

Diversity In Living Organisms

Very Short Question Answers

Q1: Who introduced the system of scientific nomenclature of organisms?

Answer: Carolus Linnaeus


Q2: In which Kingdom, an organism does not have a well defined nucleus and organelles?

Answer: Monera



Q3: In the hierarchy of classification, which group will have the largest number of organisms?

Answer: Kingdom


Q4: Which in your opinion is more basic characteristic for classifying organism. The place where they live in or the kind of cells they are made of?

Answer: Cell Design (Kinds of cells make an organism.)


Q5: Give examples of the organisms that have cilia and flagellum for moving around.

Answer: Paramecium (Cilia) and Euglena (Flagellum)

CBSE Class 9 - Science- SA1- Sample Question Paper (2016)

CBSE Class 9 - Science- SA1- Sample Question Paper (2016) 

CBSE Class 9 - Science - SA1 - IMPROVEMENT IN FOOD RESOURCES - BEE KEEPING (Q and A)

IMPROVEMENT IN FOOD RESOURCES
BEE KEEPING

Q & A

image courtesy: openclipart

Q1: Name the insect which produces food eaten by man?

Answer: Honey bee is the only insect that produces food eaten by man. It generates honey which has medicinal, nutritional and cosmetic value.


Q2(CBSE 2012): What are the common names of Apis dorsata, Apis Florae and Apis cerena Indica?

Answer: A. dorsata : Rock bee
A. Flora   : Little bee
A. cerena Indica: Indian bee


Q 3(CBSE 2012): Name the talian bee variety imported to India for honey? State the reasons for this?

Answer: Apis mellifera: Italian bee variety has also been brought in to increase yield of honey for the following reasons:
1. These bees have high honey collecting capacity
2. They sting less
3. Stay in beehive for longer periods.
4. Breeds very well.


Q4: Define 'Apiculture'  or 'Bee Keeping'.

Answer: The scientific method of rearing honeybees for honey and wax is called ‘Apiculture’ or ‘Bee keeping’.


Q5: Are bees social insects?

Answer: Yes. They live in colonies (bee hive), exhibit team work and have division of labour.

CBSE Class 9 - Chemistry - CH2 - Is Matter Around Us Pure? (Short Q and A)

Is Matter Around us pure?

Short Q & A

Simple Distillation Technique.
Can you name the labelled parts? See answer at wikimedia

Q1: Who was the first scientist to use the term 'element'?

Answer: Robert Boyle was the first scientist to use the term element in 1661.


Q2: Name the chemist who for the first time, defined an element as a basic form of matter that cannot be broken down into simpler substances by chemical reactions.

Answer: Antoine Laurent Lavoisier (1743-94), a French chemist


Q3: Who is known as the father of Modern Chemistry?

Answer: Antoine Laurent Lavoisier (1743-94), a French chemist


Q4: Do physical changes alter the identity of a substance?

Answer: No.

CBSE Class 9: Biology - Chapter - Fundamental Unit of Life - Quiz on Cell Organelles

Quiz on Cell Organelles

Identify the labelled parts of cell and name them.
Answer given below.
Image Attribution: By Kelvinsong (Own work) [CC0], via Wikimedia Commons

Read the following questions. Each question gives you a hint about a cell organelle, identify and write down its name.


Q1: Jelly like substance containing particles and other organelles. What is it?

Q2: A partially permeable layer prevents cell contents from escaping controls what substances enter and leave the cell. Identify?

Q3: A fluid-filled space surrounded by a membrane. Generally contains salts and sugars in plants.

Q4: Contains green colour pigment, traps light energy. Present in some plant cells.

Q5: Appear brown dots either present freely in cell or bound to a membrane and make proteins.

CBSE Class 9 - Cell - Fundamental Unit of Life - Question Bank

Question Bank - Cell - Fundamental Unit of Life

Plant Cell

Q1: Who observed the cells first time?

Q2: Define Cell

Q3: Who proposed the cell theory?

Q4: Who expanded cell theory by suggesting that all cells arise from pre-existing cells?

Q5: In which year electron microscope was invented?

Q6: Name the book in which Robert Hooke published his observations about cork cells.

Q7: Who discovered nucleus in the cell?

Q8: Name the two postulates of the cell theory.

Q9: Who coined the term 'protoplasm'?

Q10: Name the largest cell?

Q11: Name the world's smallest cell.

Q12: Name the smallest cell in human body.

CBSE Class 9 - Science- SA2- Sample Question Paper (2016)-Set-2

CBSE Class 9 - Science- SA2- Sample Question Paper (2016)-Set-2 

CBSE Class 9 - Science - SA2 - Sample Question Paper (2016)

CBSE Class 9 - Science- SA2- Sample Question Paper (2016) 

Class 9 - Biology - Diversity In Living Organisms (MCQs)

Diversity In Living Organisms

MCQs

Q1: Circulatory system in cockroach is _____

(a) open

(b) closed 

(c) semi-open

(d) none of these

Q2: Amphibians usually have _____ legs/feet.

(a) 2

(b) 4

(c) 6

(d) more than 6

Q3: Common name for Ascaris is

(a) shipworm

(b) round worm

(c) tape worm

(d) pin worm

Q4: Pseudocoelom is present in 

(a) Annelids

(b) Platyhelminthes

(c) Nematoda

(d) Protozoa

Q5: Which of the following is not an amphibian?

(a) Salamander

(b) Frog

(c) Newt

(d) Lizard

CBSE Class 9 - Science - Work, Energy and Power - Numerical Problems

Work, Energy and Power

Numerical Problems based on Class 9 Physics NCERT Chapter

Q1(CBSE 2012): State the relation between the commercial unit of energy and joules.

Answer: Kilowatt hour (kWh)
        1 kwh - 3.6 x 10⁶ joules


Q2: How much work is done on a body of mass 1kg whirling on a circular path of radius 5m?

Answer: Zero


Q3: A body of mass 15 kg undergoes downward displacement of 40m under the effect of gravitational force. How much work is done? (take g = 10 m/s²)

Answer:
Given
acceleration (a) = g = 10 m/s²
mass (m) = 15 kg
displacement (s) = 40 m

Work W = F × s
  = m × a × s = 15 × 10 × 40 = 6000 J
Since gravitational force and displacement are in the same direction, work is said to be positive and done on the body.



Q4: A body of mass 120 g is taken vertically upwards to reach the height of 5m.  Calculate work done. (Take g = 10 m/s²)

Answer: Given,
      a = g = - 10 m/s²
      m = 120g = 0.120 kg
      s = 5m
      Work W = F × s
 = m × g × s = 0.12 × -10 × 5 = -6 J

       Since Force and displacement act in opposite directions, work is negative. Here work is considered to be done by the body against the applied force.

Q5: A momentum of the body is increased by 20%. What is the percentage increase in its kinetic energy?

CBSE Class 9 - Science - CH2 - Is Matter Around Us Pure? (MCQs)

Is Matter Around Us Pure?

MCQs Based on Class 9 Science NCERT Book Chapter 2

Q1: Which of the following is NOT true about colloids?

(a) Particles in a colloid can pass through filter paper.
(b) A colloid is a homogeneous solution.
(c) Colloidal particles exhibit Brownian motion.
(d) Colloidal particles exhibit electrophoresis.



Q2: Which of the following is a heterogeneous mixture?

(a) air
(b) brass
(c) sugar dissolved in water
(d) lime water



Q3: How can we separate cream from milk?

(a) Centrifugation
(b) Chromatography
(c) Sublimation
(d) Distillation

CBSE Class 9 - Biology - CH6 - Tissues (MCQs)

Tissues

MCQs based on NCERT Chapter 6 Tissues

Q1: In plants which of the following have the capability of cell division?

(a) Parenchyma
(b) Sclerenchyma
(c) Xylem
(d) Apical Meristem



Q2: The growth is plants are

(a) limited to certain regions
(b) uniform in all parts
(c) limited to the top region
(d) limited to roots only.



Q3: Intercalary meristems are found 

(a) at internodes and base of leaves
(b) at growing tips of roots
(c) beneath the bark
(d) at the tips of the stem



Q4: Cells of the tissue have dense cytoplasm, thin cellulose walls and prominent vacuoles. Identify the tissue.

(a) Collenchyma
(b) Sclerenchyma
(c) Meristem
(d) Parenchyma

CBSE Class 9 - CH 12 - Sound (Study Points)

Sound

Visual Representation of Sound Waveform
(image courtsey: openclipart)

Study Points

1. Sound travels from one point to another in the form of waves.

2. Sound is produced due to vibration of different objects.

3. Sound waves are longitudinal in nature.

4. Sound travels as a longitudinal wave through a material medium.

5. Sound travels as successive compressions and rarefactions in the medium.

6. In sound propagation, it is the energy of the sound that travels and not the particles of the medium.

7. Sound cannot travel in vacuum.

8. Sound waves cannot be polarised.

9. The change in density from one maximum value to the minimum value and again to the maximum value makes one complete oscillation.

10. The part or region of a longitudinal wave in which the density of the particles of the medium is higher than the normal density is known as compression.

11. The part or region of a longitudinal wave in which the density of the particles of the medium is lesser than the normal density is called a rarefaction.

12. The distance between two consecutive compressions or two consecutive rarefactions is called the wavelength, λ.

CBSE Class 6-12 - Science - Fathers in Biology

℉α⊥нεяṧ ◎ḟ Ⅴαґḯøü﹩ ℬґαηḉℌ℮ṧ їη ℬїøł☺ℊ¥

Fathers of Various Branches in Biology

Aristotle - Father of Biology
credits: wikipedia

Num.	Branch of Biology	Name
1	Father of Biology	Aristotle
2	Father of Zoology	Aristotle
3	Father of Botany	Theophrastus
4	Father of Taxonomy	Carl Linnaeus
5	Father of Plant Physiology	Stephen Hales
6	Father of Bacteriology	Louis Pastuer
7	Father of Microbiology	Leeuwenhoek
8	Father of Immunology	Edward Jenner
9	Father of Cytology	Robert Hooke
10	Father of Mycology	Micheli
11	Father of Genetics	G J Mendel
12	Father of Experimental Genetics	T. H. Morgan
13	Father of Bryology	Johann Hedwig
14	Father of Eugenics	Francis Galton
15	Father of Microscopy	Marcello Malphigi
16	Father of Bio-diversity	E.O. Wilson
17	Father of Medicine	Hippocrates
18	Father of modern Anatomy	Andreas Vesalius
19	Father of Radiation Genetics	H. J. Muller

CBSE Class 9 Science - Diversity in Living Organisms (Important Differences)

Diversity in Living Organisms

Evolutionary Tree
credits: wikipedia

Important Differences

Five classes of vertebrates are Pisces, Amphibia, Reptilia, Aves and Mammalia

	Pisces	Amphibia	Reptilia	Aves	Mammalia
Habitat	Aquatic	Both land and water	Some terrestrial, others aquatic	Terrestrial (aerial)	Usually terrestrial, few aquatic.
Skin	Covered with scales/plates	Smooth skin with mucus glands and lacking scales	Waterproof skin with scales	Mostly covered with feathers	Covered with hair and contains sweat and oil glands.
Body Temperature Control	Cold blooded	Cold blooded	Cold blooded	Warm blooded	Warm blooded
No. of heart chambers	2	3	3 (except crocodiles)	4	4
Respiration	Gills	Gills, lungs or skin	Lungs	Lungs	Lungs
Mode of Reproduction	Oviparous (egg laying)	Oviparous	Oviparous	Oviparous	Viviparous
Locomotion	Tail and fins	Limbs	Limbs	Wings	Limbs
Examples	Rohu, shark, sea-horse, sting ray	Frog, Toad salamander,	Crocodile, snake, turtle, lizard	Pigeon, ostrich, hen, duck	Human, whale, bat, lion

CBSE Class 9 - Science - Gist on Work, Energy and Power

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Study Points

1. Work is said to be done if a force is applied on the object and it is displaced from its original position.

2. Three things are necessary for the performance of work:

• There must be an applied force F.
• There must be a displacement x.
• The force must have a component along the displacement
  

3. The work done W by a force F on an object is
    W = Fd cos θ
    where d is the displacement of an object.
    θ is the angle between the force and the displacement.

4. If displacement is along the direction of work i.e. θ = 0°
    W = Fd


5. If displacement is opposite to the force i.e. θ = 180°
    W = -Fd

6. if the displacement is perpendicular to the force (i.e. θ = 90°), then work done is zero.

7. Work done on an object by a force would be zero if the displacement of the object is zero.

8. Work is a scalar quantity.

9. Unit of work is Joule (J).

10.  1 Joule = 1 newton × 1 metre = 1 Nm
11. One Joule of work is to be done on an object when a force of one newton displaces it by one metre along the time of action of the force.

CBSE Class 9: Science - CH3 - Gist on Atoms, Molecules and Ions

Atoms, Molecules and Ions

Study Points

1. The law of conservation of mass states that there is no detectable loss or gain in total mass of the substances in a chemical reaction.

2. Law of Conservation of mass was proposed by the French chemist Antoine Lavoisier (1774)

3. The Law of constant proportion or definite proportions states that all pure specimens of the same compound contain the same elements combined together in the same proportion by weight.

4. Law of definite proportion was proposed by Louis Proust (1799).

5. An atom is the smallest particle of the element which can take part in chemical change and it can exist independently and retain all its chemical properties.

6. The smallest particle of matter made up of two or more atoms, which can exist in free state, is called a molecule.

7. Law of definite proportion does not hold good when the compound is obtained by using different isotopes of the combining elements .

8. Each atom of an element shows all the properties of the element.

CBSE Class 9 - Science - CH4 - Gist on Structure of The Atom

Structure of The Atom

Study Points

1. Democritus, Greek Philosopher in 400 BC named the smallest piece of matter “ATOMOS ,” meaning “not to be cut.”
2. Dalton's theory (1803) was based on the premise that the atoms of different elements could be distinguished by differences in their weights.
3. WIth the invention of Scanning Tunneling Microscope we can see atoms.
4. Electrons, protons and neutrons are the fundamental particles of an atom.
5. Electrons were discovered by JJ Thomson in discharge tube experiments as cathode rays.
6. Cathode rays are streams of negatively charged particles.
7. They are deflected by electric and magnetic fields.
8. The specific charge of electron was determined by J. J. Thomson
9. The charge of the electron is 1.602 x 10-19 coulombs.
10. The absolute mass of electron is 9.108 x 10-28 g or 9.108 x 10-31kg
11. Protons are positive rays that were discovered by Goldstein in the discharge tube experiments when perforated metal cathode was used.

CBSE Class 9 - SA1 - Science - Sample Question Paper (2014-15)

SUMMATIVE ASSESSMENT - I 2014

SCIENCE - Class - IX

Time Allowed : 3 hours -                                              Maximum Marks : 90

General Instructions:

1. The question paper comprises of two Sections, A and B. You are to attempt both the sections.

2. All questions are compulsory

3. All questions of Section-A and all questions of Section-B are to be attempted separately.

4. Question numbers 1 to 3 in Section-A are one mark questions. These are to be answered in one word or in one sentence

5. Question numbers 4 to 6 in Sections-A are two marks questions. These are to be answered in about 30 words each.

6. Question numbers 7 to 18 in Section-A are three marks quesrons. These are to be answered in about 50 words each

7. Question numbers 19 to 24 in Section-A are five marks questions. These are to be answered in about 70 words each.

8. Question numbers 25 to 33 in Section-B are multiple choice questions based on practical skills. Each question is a one mark question. You are to select one most appropriate response out of the four provided to you.

9. Question numbers 34 to 36 in Section-B are questions based on practical skills are two marks questions.

	SECTION-A
Q1.	Which micro-organism lacks any kind of membrane ?	1
Q2.	An ant travels from P to Q .and then moves from Q toR (as shown in the diagram). Show its resultant displacement in the diagram.	1
Q3.	Write the value of acceleration produced in a freely falling body.	1
Q4.	State the principle used to separate two immiscible liquids of a mixture. Draw a neat and labelled diagram of the apparatus used.	2
Q5.	What is the function of s$xe tube cells and how are they designed to carry out their function ?	2
Q6.	State reason for the following: (i) Road accidents occurring due to high speeds are much worse than accidents due to low speeds of vehicles. (ii) When a motor car makes a sharp turn at a high speed passengers tend to get thrown to one side.

CBSE Class 9 - DAV Panvel - SA 1 Practice Test Papers (2014)

Class 9 SA 1 Practice Test Papers

Credits: The SA1 Practice Test Papers designed by DAV (Panvel) teachers.

SA1 English Sample Question Paper (2014)

SA1 Hindi Sample Question Paper (2014)

SA1 Mathematics Sample Question Paper (2014)